Re: [CentOS] Mount removed raid disk back on same machine as? original raid

[Bowie Bailey via CentOS]

On 3/14/2023 10:03 AM, Robert Heller wrote:

At Tue, 14 Mar 2023 09:50:33 -0400 Bowie Bailey ,? CentOS 
mailing list  wrote:


I know I will have to bring the drive online as a broken array, but I've
done that from other systems.  The only question there is can I simply
rebuild it with a different name.  I assume I can just do "mdadm -A
--run /dev/md0 /dev/sdc1" (possibly with "--force" due to the broken
array) even if sdc1 was originally part of the existing md127 array?

This should work.


Unfortunately, no.  The system would not mount the drive without some 
other changes.  Listing the process here for anyone else who comes 
across this thread.


Trying to start the array (with or without --force), fails with the message:

    mdadm: Found some drive for an array that is already active: /dev/md127
    mdadm: giving up

I found with some digging that I needed to change the UUID of the drive 
to be able to mount it separately from the existing array.  I used 
"sgdisk -G /dev/sdg1" to do this.  It worked, but gave quite a few scary 
warning messages in the process.  A better idea would have been to use 
uuidgen to generate a random uuid and then start the array like this:


    mdadm --assemble /dev/md99 --update=uuid --uuid= /dev/sdg1
(might require --force for a broken array, I'm not sure since I didn't 
actually do it this way)


Once the array is running, there is another problem.  Attempting to 
mount the array gives another error:


    mount: wrong fs type, bad option, bad superblock on /dev/md99,
        missing codepage or helper program, or other error

Useless error message.  You have to look in dmesg to see the actual problem:

    XFS (md99): Filesystem has duplicate UUID 
7e237dbd-6c24-4781-98d1-a1ae80a3ed13 - can't mount


I would assume you would have a similar issue with any other 
filesystem.  In my case, since it is XFS, I used uuidgen to generate 
another random uuid and then updated it like this:


    xfs_admin -U  /dev/md99

After that, the filesystem mounted normally.

Hopefully that is helpful for anyone else who finds themselves in this 
situation.


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Re: [CentOS] Mount removed raid disk back on same machine as original raid

[Bowie Bailey via CentOS]

On 3/8/2023 4:08 PM, Chris Adams wrote:

Once upon a time, Bowie Bailey  said:

What is going to happen when I try to mount a drive that the system
thinks is part of an existing array?

I don't _think_ anything special will happen - md RAID doesn't go
actively looking for drives like that AFAIK.  And RAID 1 means you
should be able to ignore RAID and just access the contents directly.

However, the contents could still be a problem.  If LVM was in use on
it, that will be a problem, because LVM does auto-probe and will react
when it sees the same UUID (IIRC LVM will only block access to the newly
seen drive).  I don't think any filesystems care (I know I've mounted
snapshots of ext4 and IIRC xfs on the same system, haven't touched
btrfs).


I'm not using LVM on this drive, so that won't be an issue.

My concern is that since the raid info on the drive will identify itself 
as part of the active raid, the system will try to add it to the raid 
(probably as a spare) when it comes online.  I don't think that would be 
destructive, but I would have to figure out how to separate it out if 
that happens.  I'm hoping that it won't be an issue since there are no 
missing drives in the existing raid.


I know I will have to bring the drive online as a broken array, but I've 
done that from other systems.  The only question there is can I simply 
rebuild it with a different name.  I assume I can just do "mdadm -A 
--run /dev/md0 /dev/sdc1" (possibly with "--force" due to the broken 
array) even if sdc1 was originally part of the existing md127 array?


The system in question is in a data center, so I'm trying to get ahead 
of any possible problems to avoid having to deal with unexpected issues 
while I'm there.


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[CentOS] Mount removed raid disk back on same machine as original raid

[Bowie Bailey via CentOS]

I have a Centos 7 system with an mdraid array (raid 1).  I removed a 
drive from it a couple of months ago and replaced it with a new drive.  
Now I want to recover some information from that old drive.


I know how to mount the drive, and have done so on another system to 
confirm that the information I want is there.


My question is this:

What is going to happen when I try to mount a drive that the system 
thinks is part of an existing array?


To put it another way:  I had two drives in md127.  I removed one (call 
it drive1), and replaced it with a new drive.  Some files were 
accidentally deleted from md127, so now I want to connect drive1 back to 
the same machine and mount it as a separate array from md127 so I can 
copy the files from drive1 back to md127.  What do I need to do to make 
that happen?


Thanks,

Bowie
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Re: [CentOS] Connecting an android tablet to CentOS

[Bowie Bailey via CentOS]

On 9/14/2021 2:29 PM, Scott Robbins wrote:

On Tue, Sep 14, 2021 at 11:09:34AM -0600, Frank Cox wrote:

On Tue, 14 Sep 2021 17:01:29 +
Richard wrote:


[My android device file viewer(s) wouldn't get me into the
Kindle data directory.]



There's an app I use. Cx file explorer. It will go into the kindle
directory, and from there, I can delete files. On the rare occasions I put
a book in there--for example, at times, an author makes a free ebook
available, I use jmtpfs. This is on a fairly minimal install with openbox,
I suspect that Gnome's file manager might be able to do it. (I can with
Fedora 34's live Gnome workstation).


For copying files to and from my PC (including Kindle books), I use an app called 
WIFI FTP Server.  It starts up an FTP server on your phone that you can connect to 
with Filezilla (or whatever) from your PC.  The server is only active while the app 
is running and you can set a password.  FTP is not a particularly secure protocol, 
but since I only used it when I'm on my home WIFI, it's not much of a risk.  It lets 
me move files around without worrying about cables, drivers, USB modes, etc.


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Re: [CentOS] iptables - how to block established connections with fail2ban?

[Bowie Bailey]

On 6/26/2019 2:41 AM, MRob wrote:
> I am working to a CentOS 6 server with nonstandard iptables system without 
> rule for
> ACCEPT ESTABLISHED connections. All tables and chains empty (flush by legacy 
> custom
> script) so only filter/INPUT chain has rules (also fail2ban chain):
>
> Chain INPUT (policy ACCEPT)
> target prot opt source   destination
> f2b-postfix   tcp  --  0.0.0.0/0    0.0.0.0/0
> ACCEPT all  --  192.168.0.0/16   0.0.0.0/0
> ACCEPT all  --  127.0.0.0/8  0.0.0.0/0
> ACCEPT tcp  --  0.0.0.0/0    0.0.0.0/0   tcp dpt:22
> ACCEPT tcp  --  0.0.0.0/0    0.0.0.0/0   tcp dpt:25
> ACCEPT tcp  --  0.0.0.0/0    0.0.0.0/0   tcp dpt:80
> ACCEPT tcp  --  0.0.0.0/0    0.0.0.0/0   tcp dpt:443
> ACCEPT tcp  --  0.0.0.0/0    0.0.0.0/0   tcp dpt:587
> ACCEPT tcp  --  0.0.0.0/0    0.0.0.0/0   tcp dpt:993
> ACCEPT tcp  --  0.0.0.0/0    0.0.0.0/0   tcp dpt:995
> DROP   tcp  --  0.0.0.0/0    0.0.0.0/0   tcp 
> flags:0x17/0x02
>
> Chain f2b-postfix (1 references)
> target prot opt source   destination
> REJECT all  --  200.23.235.30    0.0.0.0/0   reject-with
> icmp-port-unreachable
> REJECT all  --  177.11.167.57    0.0.0.0/0   reject-with
> icmp-port-unreachable
> RETURN all  --  0.0.0.0/0    0.0.0.0/0
>
> When fail2ban block a IP address, established connections are allowed to 
> continue,
> but with no rule to accept established connections how is that possible? Why
> doesn't f2b first rule block established connections?

The way I solved this problem was using conntrack.  I added entries to the 
fail2ban
action to delete connections where the source or destination matched the IP I 
was
trying to block.  This results in all communications from that IP being dropped
immediately.  I used a .local file to redefine the actionban.  It looks like 
this:

$ cat firewallcmd-allports.local
[Definition]
actionban = firewall-cmd --direct --add-rule ipv4 filter f2b- 0 -s  -j

    (conntrack -D -s ; exit 0)
    (conntrack -D -d ; exit 0)

You have to install the conntrack-tools package to use the conntrack command, 
but I
don't remember having to do anything else to make it work.

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Re: [CentOS] Postfix and choice of RBL

[Bowie Bailey]

On 6/17/2019 1:08 PM, Alexander Dalloz wrote:
> Am 17.06.2019 um 16:50 schrieb Bowie Bailey:
>> On 6/17/2019 6:20 AM, Nicolas Kovacs wrote:
>>> Hi,
>>>
>>> I'm managing several mail servers running CentOS 7, Postfix and Dovecot.
>>> SpamAssassin is filtering mail nicely, but I'm considering using RBL
>>> (blacklists) to take some load off the servers.
>>>
>>> General question to those of you who use RBL. Which lists do you
>>> recommend using?
>>
>> The best free blacklist that I'm aware of is zen.spamhaus.org.  I've been 
>> using it as
>> a blacklist on my server for years without any problems.
>>
>> More info: https://www.spamhaus.org/zen/
>
> Spmhaus isn't free per se.
>
> https://www.spamhaus.org/organization/dnsblusage/

Right.  I haven't looked at blacklists in a while and I'm nowhere near their 
limits
for free use, so I forgot that they charge for higher volume users.

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Re: [CentOS] Postfix and choice of RBL

[Bowie Bailey]

On 6/17/2019 6:20 AM, Nicolas Kovacs wrote:
> Hi,
>
> I'm managing several mail servers running CentOS 7, Postfix and Dovecot.
> SpamAssassin is filtering mail nicely, but I'm considering using RBL
> (blacklists) to take some load off the servers.
>
> General question to those of you who use RBL. Which lists do you
> recommend using?

The best free blacklist that I'm aware of is zen.spamhaus.org.  I've been using 
it as
a blacklist on my server for years without any problems.

More info: https://www.spamhaus.org/zen/

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Re: [CentOS] Finding memory usage

[Bowie Bailey]

On 7/27/2018 12:58 PM, mark wrote:
> Bowie Bailey wrote:
>> On 7/27/2018 11:50 AM, Warren Young wrote:
>>> On Jul 27, 2018, at 9:10 AM, Bowie Bailey  wrote:
>>>
>>>> I have a CentOS 7 server that is running out of memory
>>>>
>>> How do you know that?  Give a specific symptom.
>>>
>> This was brought to my attention because one program was killed by the
>> kernel to free memory and another program failed because it was unable to
>> allocate enough memory.
> 
> Um, wait a minute - are you saying the oom-killer was invoked? My reaction
> to that is to define the system, at that point, to be in an undefined
> state, because you don't know what some threads that were killed are.

Probably true, but the system has been rebooted since then and the
oom-killer has not been activated since then.  When I first noticed the
problem, I also found that my swap partition had been deactivated, which
is why the oom-killer got involved in the first place instead of just
having swap usage slow the system to a crawl.

I think I have identified the program that is causing the problem
(memory usage went back to normal when the process ended), but I'm still
not sure how it ended up using 10x the memory that top reported for it.

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Re: [CentOS] Finding memory usage

[Bowie Bailey]

On 7/27/2018 12:13 PM, Gordon Messmer wrote:
> On 07/27/2018 08:10 AM, Bowie Bailey wrote:
>> The problem is that I can't find 2.4G of usage.
>
>
> Are your results from "top" similar to:
>
>   ps axu | sort -nr -k +6

That looks the same.

>
> If you don't see 2.4G of use from applications, maybe the kernel is
> using a lot of memory.  Check /proc/slabinfo.  You can simplify its
> content to bytes per object type and a total:
>
>   grep -v ^# /proc/slabinfo | awk 'BEGIN {t=0;} {print $1 " " ($3 *
> $4); t=t+($3 * $4)} END {print "total " t/(1024 * 1024) " MB";}' |
> column -t

The total number from that report is about 706M. 

My available memory has now jumped up from 640M to 1.5G after one of the
processes (which was reportedly using about 100M) finished.

I'll have to wait until the problem re-occurs and see what it looks like
then, but for now I used the numbers from "ps axu" to add up a real
total and then added the 706M to it and got within 300M of the memory
currently reported used by free.

What could account for a process actually using much more memory than is
reported by ps or top?

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Re: [CentOS] Finding memory usage

[Bowie Bailey]

On 7/27/2018 11:50 AM, Warren Young wrote:
> On Jul 27, 2018, at 9:10 AM, Bowie Bailey  wrote:
>> I have a CentOS 7 server that is running out of memory
> How do you know that?  Give a specific symptom.

This was brought to my attention because one program was killed by the
kernel to free memory and another program failed because it was unable
to allocate enough memory.

>
>> Running "free -h" gives me this:
>>   totalusedfree  shared  buff/cache  
>> available
>> Mem:   3.4G2.4G123M5.9M  
> This is such a common misunderstanding that it has its own web site:
>
> https://www.linuxatemyram.com/

Right, and that website says that you should look at the "available"
number in the results from "free", which I what I was referencing.  They
say that a healthy system should have at least 20% of the memory
available.  Mine was down to 17% in what I posted in my email and it was
at about 8% when I rebooted yesterday.

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Re: [CentOS] Finding memory usage

[Bowie Bailey]

On 7/27/2018 11:14 AM, Jon Pruente wrote:
> On Fri, Jul 27, 2018, 10:10 AM Bowie Bailey  wrote:
>
>> I have a CentOS 7 server that is running out of memory and I can't
>> figure out why.
>> 
>> The problem is that I can't find 2.4G of usage.  If I look at resident
>> memory usage using "top", the top 5 processes are using a total of
>> 390M.
>>
> On a lark, what kind of file systems is the system using and how long g had
> it been up before you rebooted?

The filesystems are all XFS.  I don't know for sure how long it had been
up previously, I'd guess at least 2 weeks.  Current uptime is about 25
hours and the system has already started getting into swap.

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[CentOS] Finding memory usage

[Bowie Bailey]

I have a CentOS 7 server that is running out of memory and I can't
figure out why.

Running "free -h" gives me this:
  total    used    free  shared  buff/cache  
available
Mem:   3.4G    2.4G    123M    5.9M   
928M    626M
Swap:  1.9G    294M    1.6G

The problem is that I can't find 2.4G of usage.  If I look at resident
memory usage using "top", the top 5 processes are using a total of
390M.  The next highest process is using 8M.  For simplicity, if I
assume the other 168 processes are all using 8M (which is WAY too high),
that still only gives a total of 1.7G.  The tmpfs filesystems are only
using 18M, so that shouldn't be an issue.

Yesterday, the available memory was down around 300M when I checked it. 
After checking some things and stopping all of the major processes,
available memory was still low.  I gave up and rebooted the machine,
which brought available memory back up to 2.8G with everything running.

How can I track what is using the memory when the usage doesn't show up
in top?

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Re: [CentOS] low end file server with h/w RAID - recommendations

[Bowie Bailey]

On 11/2/2017 8:04 AM, Gary Stainburn wrote:

I'm just about to build a new server and I'm looking for recommendations on
what hardware to use.

I'm happy with either a brand name, or building my own, but would like a
hardware RAID controller to run a pair of disks as RAID1 that is actually
compatible with and manageable through Linux.

Any recommendations would be appreciated.


If you want raid 5 or 6, then you should get a hardware controller. For 
raid 1, mdadm should work just fine.  I would suggest trying it before 
buying a raid controller.  If it works for you, you save a few hundred 
dollars and you have one less piece of hardware to worry about.


I haven't looked at them in quite a few years, but last time I was in 
the market for a raid controller, Areca controllers were the way to go.


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Re: [CentOS] Transferring Thunderbird mail accounts: Windows vs. Linux

[Bowie Bailey]

On 10/26/2017 12:57 PM, Nicolas Kovacs wrote:

Hi,

One of my clients brought me his PC with Windows 7, so I can migrate it
to Linux, e. g. CentOS 7 + KDE. So far I made a backup of all the data,
but I wonder how I can migrate the existing Thunderbird account.

An operation I perform quite regularly is replace an existing Linux
system (Ubuntu, openSUSE, Fedora, whatever) by CentOS. When Thunderbird
is configured, I just backup the whole ~/.thunderbird directory and then
restore it on the new installation, which usually works perfectly. Any
idea if I do this when moving a desktop installation from Windows 7 to
CentOS?

Cheers,

Niki


Should work just fine.  I was running my computer as a dual-boot with 
Windows 7 and Linux Mint for a while.  I shared the whole Thunderbird 
profile directory with both OS's.  As I recall, the only issue was that 
the Lightning calendar add-on was OS-specific and would only work on one 
of the two unless I re-installed it for whichever OS I was on at the time.


Give it a shot.  Most likely, you'll only have to re-install an add-on 
or two for the new OS.


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Re: [CentOS] [OT] Bash help

[Bowie Bailey]

On 10/25/2017 3:34 PM, Warren Young wrote:

On Oct 25, 2017, at 11:28 AM, Mark Haney  wrote:

An associative array was the first thing I thought of, then realized BASH 
doesn't do those.

But it does: in Bash 4, only.

If you mean you must still use Bash 3 in places, then yeah, you’ve got a 
problem… one probably best solved by switching to some other language once the 
program grows beyond Bash 3’s natural scope.

I was trying to think of which languages I know well which require even more 
difficult solutions than the Bash 4 one.  It’s a pretty short list: assembly, 
C, and MS-DOS batch files.  By “C” I’m including anything of its era and 
outlook: Pascal, Fortran…

I think even Tcl beats Bash 4 on this score, and it’s notoriously minimal in 
its feature set.

Here’s a brain-bender: You could probably do it with sqlite3 with fewer lines 
of code than my Bash 4 offering. :)


I honestly expected there to be a fairly straight forward way to do it in BASH, 
but I was sadly mistaken.

Oh, I don’t know, there must be a way to do it without associative arrays, but 
you’d only get points for the masochism value in doing without.


Array N holds the names and array T holds the totals.  For each line in 
the file, you iterate through N to find the name and then add the number 
to the same index in T (or create a new entry in both arrays if you 
don't find it).  Then you just have to iterate through both arrays and 
print off the names from N and the totals from T.  It's a pain, but it's 
doable.


Sorry, I'm too lazy to write code for this...  :)

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Re: [CentOS] [OT] Bash help

[Bowie Bailey]

On 10/25/2017 12:41 PM, Mark Haney wrote:

On 10/25/2017 12:33 PM, Robert Arkiletian wrote:

here is a python solution
#!/usr/bin/python
#python 2 (did not check if it works)
f=open('yourfilename')
D={}
for line in f:
 email,num = line.split()
 if email in D:
 D[email] = D[email] + num
 else:
 D[email] = num
f.close()
for key in D:
 print key, D[key]
___
That gets me closer, I think.  It's concatenating the number of 
messages, but it's a start. Thanks.




I do this kind of thing on a fairly regular basis with a Perl one-liner:

perl -ne '($email, $num) = split; $tot{$email} += $num; END { for $email 
(keys %tot) { print "$email $tot{$email}\n" } }' < yourfile


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Re: [CentOS] Crazy thought about upgrading to new major release

[Bowie Bailey]

On 6/6/2017 5:29 PM, m.r...@5-cent.us wrote:

Jerry Geis wrote:

I have older systems out there that work fine, just for what ever reason
would be great to upgrade from a C5 -> C7 (due to no longer supported) or
C6 > C7 (for updated packages).

Sounds like the upgrade tool is not quite an option...
I was thinking...

What would be wrong with any "easy" script that did the following:

1) Removed all packages with the --justdb option.
2) Import the RPM-GPG-KEY-CentOS-7
3) install the centos-release-7.3.1611 ... rpm
4) yum -y upgrade
5) yum groupinstall "GNOME Desktop"   (for example)

and reboot of course.

Does that have any chance or working and be valid?


I know I've posted what we do here to upgrade one system from another
before, but not in a few years.

mkdir /new
mkdir /boot/new
rsync -HPavzx --exclude=/old --exclude=/var/log/wtmp
--exclude=/var/log/lastlog $machine:/. /new/.
rsync -HPavzx $machine:/boot/. /boot/new/.
rsync -HPavzx /etc/sysconfig/network-scripts/ifcfg-eth*
/new/etc/sysconfig/network-scripts
rsync -HPavzx /etc/sysconfig/hwconf /new/etc/sysconfig
rsync -HPavzx /boot/grub/device.map /boot/new/grub/
rsync -HPavzx /etc/udev/rules.d/70-persistent-net.rules
/new/etc/udev/rules.d/
find /new/var/log/ -type f -exec cp /dev/null {} \;

Fix /new/etc/fstab, ESP if you use UUID. I *strongly* prefer LABEL=
Then, any webserver stuff if the old was running it.
If this system is using Linux RAID,

  rsync -HPavx /old/etc/md.conf /etc/

If yuo want to, copy the original SSH keys:

rsync -HPavzx /etc/ssh/ssh_host* /new/etc/ssh

Don't forget /boot/grub/device.map, and for C6, /new/boot/grub/grub.conf
is right, or for C7, /new/boot/grub2/grub.conf is good.

NOTE this will work for identical machines. Otherwise, BEFORE you rotate
ou may need to run "mkinitrd" for the latest kernel if the hardware is
different between the machine you are upgrading and the machine you made
the copy.

mount --bind /dev /new/dev
mount --bind /sys /new/sys
mount --bind /proc /new/proc
mount --bind /boot/new /new/boot
chroot /new
cd /lib/modules
VER=$(ls -rt1 | tail -1)
echo $VER
mkinitrd X $VER
mv X /boot/initrd-$VER.img
exit
umount /new/dev /new/sys /new/proc /new/boot


Then rotate:

zsh
zmodload zsh/files

cd /boot
mkdir old
mv * old
mv old/lost+found .
mv old/new/* .

# Root partition.
cd /
mkdir old
mv * old
mv old/lost+found .
#mv old/root . -- WHY?
mv old/scratch .
mv old/new/* .

sync
sync

And reboot. If there are issues with grub, get it up from the grub shell,
then grub-install or grub2-install as appropriate.


Interesting process.  As far as I can tell, this keeps very little of 
the configuration from the old system.  You would still have to 
re-install and copy the configurations for any necessary packages along 
with any crontab entries that were on the old system.


Other than reducing downtime, what are the advantages of doing this 
rather than just building the new OS onto a new hard drive and then 
copying things over?


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Re: [CentOS] Missing rpms - Re: What is in a yum group

[Bowie Bailey]

On 5/25/2017 3:43 PM, Robert Moskowitz wrote:


Note that you do not have xfce-utils or leafpad.

Do you have themes?  What is your background.

I have actually gotten Xfce working.  Kindof.  I am into Xfce via 
vncserver.  It pretty much looks like Xfce on my Fedora systems. 
Backleveled a bit of course.  No sensor applet to show the cpu temp 
for example.


But no background, other than black.

Oh, and no NetworkManager on the tray.

I am going to install geany for the editor.  I use geany a lot for 
editing xml and html files so am familiar with it.  It is just a bit 
much for editing a simple text file.


Anyway, it is possible to get Xfce running on Centos7, but it is 
missing some rpms.


I don't actually use Xfce.  I was just noting that it did not give me 
any errors on my system regarding missing packages.  I have not 
attempted to install and use it.


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Re: [CentOS] Missing rpms - Re: What is in a yum group

[Bowie Bailey]

On 5/25/2017 12:07 PM, Robert Moskowitz wrote:



On 05/25/2017 11:22 AM, Bowie Bailey wrote:

On 5/25/2017 10:04 AM, Robert Moskowitz wrote:



On 05/25/2017 09:32 AM, Leon Fauster wrote:
Am 25.05.2017 um 15:27 schrieb Robert Moskowitz 
<r...@htt-consult.com>:


Thanks.  I followed this to: 
http://mirror.centos.org/centos/7/os/x86_64/Packages/


And could not find any of the following:

No package xfce-utils available.
No package NetworkManager-gnome available.
No package leafpad available.
No package xfce4-icon-theme available.
Package xfce4-mixer is obsoleted by xfce4-pulseaudio-plugin, 
trying to install xfce4-pulseaudio-plugin-0.2.4-4.el7.x86_64 instead

No package xfwm4-theme-nodoka available.

So it would appear that an Xfce desktop install is 'broken' for 
some level of brokeness for Centos7.


But interestingly, NetworkManager-gnome is not used by gnome. It 
has a bunch of other NetworkManager rpms.  I also checked Fedora 
21 and 24 and their Xfce desktop does not list 
NetworkManager-gnome when I do a group info xfce.  So there is 
something wrong in the packaging of the xfce group in Centos7-x64 
that Scott provided me...


Xfce is provided by EPEL:

https://lists.centos.org/pipermail/centos/2017-May/164858.html


I missed that your two emails pointed to different urls. Thanks. But...

Enabling epel does not provide an Xfce group.
Enabling epel does not give me the missing rpms.  It does provide 
both mixer and pulseaudio-plugin, but not the others.


So Xfce is still broken at some level of brokeness with C7.


On my rather basic C7 system with epel enabled, I don't see any 
problems.


# yum groupinstall "Xfce"
...
Install  20 Packages (+193 Dependent packages)

It did not give any errors and the install list does not mention any 
of the missing packages that you list above.  It works fine with C7.  
There must be some difference with your system.


The group is not on my system.  I am using ClearOS' version of the 
Centos repos, so not necessarily a surprise.  And all my other servers 
are Centos7-armv7hl, also with no Xfce group.  But the armv7hl repos 
have a number of build challenges that we have had to work around...


Can you please run:

yum group info Xfce

and send me the output?


Here is what the group info gives me:

Group: Xfce
 Group-Id: xfce-desktop
 Description: A lightweight desktop environment that works well on low 
end machines.

 Mandatory Packages:
   +Thunar
   +xfce-utils
   +xfce4-panel
   +xfce4-session
   +xfce4-settings
   +xfconf
   +xfdesktop
   +xfwm4
 Default Packages:
   +NetworkManager-gnome
   +gdm
   +leafpad
   +openssh-askpass
   +orage
   +polkit-gnome
   +thunar-archive-plugin
   +thunar-volman
   +tumbler
   +xfce4-appfinder
   +xfce4-icon-theme
   +xfce4-power-manager
   +xfce4-pulseaudio-plugin
   +xfce4-session-engines
   +xfce4-terminal
   +xfwm4-theme-nodoka
 Optional Packages:
   xfwm4-themes
 Conditional Packages:
   +pinentry-gtk

I don't know why that list is different from what it actually tries to 
install.  When I try to install it, I get this:


Installing for group install "Xfce":
 Thunar x86_641.6.11-1.el7 epel   1.4 M
 gdm x86_641:3.14.2-20.el7_3 updates719 k
 openssh-askpass x86_646.6.1p1-35.el7_3 updates 
74 k

 orage x86_644.12.1-3.el7 epel   1.8 M
 polkit-gnome x86_640.105-6.el7 epel82 k
 thunar-archive-plugin x86_640.3.1-6.el7 
epel69 k

 thunar-volman x86_640.8.1-2.el7 epel   175 k
 tumbler x86_640.1.31-2.el7 epel   195 k
 xfce4-appfinder x86_644.12.0-4.el7 epel   194 k
 xfce4-panel x86_644.12.0-4.el7 epel   820 k
 xfce4-power-manager x86_641.6.0-2.el7 epel   769 k
 xfce4-pulseaudio-plugin x86_640.2.5-1.el7 
epel71 k

 xfce4-session x86_644.12.1-8.el7 epel   484 k
 xfce4-session-engines x86_644.12.1-8.el7 
epel   315 k

 xfce4-settings x86_644.12.0-7.el7 epel   658 k
 xfce4-terminal x86_640.6.3-4.el7 epel   484 k
 xfconf x86_644.12.0-3.el7 epel   199 k
 xfdesktop x86_644.12.3-2.el7 epel   1.0 M
 xfwm4 x86_644.12.3-2.el7 epel   627 k
Installing:
 pinentry-gtk x86_640.8.1-17.el7 base51 k

Plus 193 dependencies.  I do not have any xfce packages installed already.

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Re: [CentOS] Missing rpms - Re: What is in a yum group

[Bowie Bailey]

On 5/25/2017 10:04 AM, Robert Moskowitz wrote:



On 05/25/2017 09:32 AM, Leon Fauster wrote:

Am 25.05.2017 um 15:27 schrieb Robert Moskowitz :

Thanks.  I followed this to: 
http://mirror.centos.org/centos/7/os/x86_64/Packages/


And could not find any of the following:

No package xfce-utils available.
No package NetworkManager-gnome available.
No package leafpad available.
No package xfce4-icon-theme available.
Package xfce4-mixer is obsoleted by xfce4-pulseaudio-plugin, trying 
to install xfce4-pulseaudio-plugin-0.2.4-4.el7.x86_64 instead

No package xfwm4-theme-nodoka available.

So it would appear that an Xfce desktop install is 'broken' for some 
level of brokeness for Centos7.


But interestingly, NetworkManager-gnome is not used by gnome. It has 
a bunch of other NetworkManager rpms.  I also checked Fedora 21 and 
24 and their Xfce desktop does not list NetworkManager-gnome when I 
do a group info xfce.  So there is something wrong in the packaging 
of the xfce group in Centos7-x64 that Scott provided me...


Xfce is provided by EPEL:

https://lists.centos.org/pipermail/centos/2017-May/164858.html


I missed that your two emails pointed to different urls.  Thanks. But...

Enabling epel does not provide an Xfce group.
Enabling epel does not give me the missing rpms.  It does provide both 
mixer and pulseaudio-plugin, but not the others.


So Xfce is still broken at some level of brokeness with C7.


On my rather basic C7 system with epel enabled, I don't see any problems.

# yum groupinstall "Xfce"
...
Install  20 Packages (+193 Dependent packages)

It did not give any errors and the install list does not mention any of 
the missing packages that you list above.  It works fine with C7.  There 
must be some difference with your system.


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Re: [CentOS] email subject length issue

[Bowie Bailey]

On 4/12/2017 4:17 PM, Jerry Geis wrote:

Oh I understand now what is happening. The subject is coming in as three
lines.

Subject: Tornado Monday, 03/27/2017 at 20:27:02. The Point BB.OBSURGRH is
  in Alarm at PRI3 with a value of 63.4 %.Informational Text: OB SURGERY
  HUMIDITY ALARM

I'm not getting the second two lines.

How "should" one correctly get the subject ???

What I did was in my .procmailrc file
SUBJECT=`cat | grep Subject:`

So this resulted in only the first line and not grabbing the additional 2
lines.

Is there a way to correctly get the subject that I have not found?


You'll need to grab the line that starts with "Subject:" and then 
continue grabbing lines until you find one that doesn't start with 
whitespace.  I don't think you can do this with grep, but you should be 
able to do it with perl, sed, or awk.


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Re: [CentOS] photos on iPhone 6

[Bowie Bailey]

On 10/20/2016 3:56 PM, J Martin Rushton wrote:

A bit of a perennial I'm afraid.  My wife has filled up her iPhone 6
with photos, and wants them moved onto my computer.  I'm running CentOS
7 patched about 30 minutes ago.  Needless to say the computer can't see
the data on the iPhone, though it does recognise the phone as an iPhone.

Any suggestions (well any that don't involve a steam roller, sledge
hammer or GBH to the whole of Apple Inc)?

$ uname -a
Linux tamar.home 3.10.0-327.36.1.el7.x86_64 #1 SMP Sun Sep 18 13:04:29
UTC 2016 x86_64 x86_64 x86_64 GNU/Linux


Don't know about iPhone, but with an Android phone, I would install an 
ftp server app and then ftp the files over to the computer. Alternately, 
start an ftp server on the computer and use an ftp client app on the 
phone to copy the files to the computer.  Of course, this is assuming 
that iOS will let you have direct access to the photo directories.


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Re: [CentOS] EPEL - Clamav update?

[Bowie Bailey]

On 4/4/2016 2:16 AM, Ned Slider wrote:



On 03/04/16 22:10, Ireneusz Piasecki wrote:

W dniu 03.04.2016 o 04:39, Rob Kampen pisze:

EPEL maintainers?
I note messages in the log about updated version 0.99.1 of CLAMAV
being available since Mar 5th.
for CentOS 6 no update is available yet.
I used to use rpmforge for this package but that languished for months
before updates became available and eventually stopped altogether.
Is there something I can do to assist in getting this package updated?
I have no idea if this is a difficult package to compile with lots of
dependancies or some otherwise complexities.
In this era of constant SPAM and so many virus / trojan attempts to do
harm to others, it is vital that we run this package to protect our
users.
Please let me know if / how I can assist.
Kind regards
Rob

Hi,

Does clamav detect anything in this floding e-mail viruses ? My clamav
instalation (with amavisd-new) in centos 5 with the current signatures
detect nothing in compare to virustotal.org antivirus - i noticed that
clamav signatures are lag behind form the top antivir in the market.

Viruses in ZIP archives goes via my e-mail gateway (amavisd-new+clamavd)
and are stopped finally by F-Secure Client Security. So, clamav is
defend from anything ?

Sorry for off topic.



That is pretty much my experience too - I've only seen the occasional 
FP hit from ClamAV on a mail server for as long as I can remember.


The latest flavour of the month seems to be .js ransomware which go 
undetected. I have long blocked all executable file types in amavisd 
as a matter of policy.


IMHO the AV vendors lost the battle a long time ago - they simply 
can't compete with the bad guys nor keep up with the volume and this 
particular layer of defence is now less effective/ineffective.


Adding the Sanesecurity signatures to ClamAV greatly increases its hit 
rate.  It also has the advantage of blocking lots of phishing and spam 
garbage in addition to the viruses and malware.


http://sanesecurity.com/usage/signatures/

There are download scripts for both Linux and Windows available on the 
Sanesecurity site to keep the signatures current.


Further discussion should probably move to the clamav-users mailing list.

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Re: [CentOS] Two WiFi routers

[Bowie Bailey]

On 11/5/2015 7:22 AM, Timothy Murphy wrote:

Gordon Messmer wrote:


As a point of clarification: The setup that you're describing isn't
multiple WiFi routers, it's multiple WiFi Access Points.

Thanks for your response, and for all the others.
I am indeed using the two routers as Access Points,
turning off dhcp on them, etc.

I did actually try what has been suggested,
but it didn't seem to work,
which made me wonder if it was possible in principle.


It is possible.  I have this setup running both at home and at the office.


However, I almost certainly made some mistake setting up
the second router/AP, which is actually an ancient Netopia router
from my ISP, whose manual says it can be used as an AP.
I see it with "arp -a" on my server,
but I've now noticed I don't see it on my Android phone,
or with "iwlist scan" on my laptop.

Apologies, I don't think this router/AP is working ...


In order for devices to be able to seamlessly switch between access 
points, they must have the EXACT same wifi security setup (SSID, 
security method, and password).  I had a problem with this at work 
trying to use an old router that would not do WPA2.


It can be confusing to figure out exactly which access point you are 
using when the SSID's are all the same.  The Wifi Analyzer app will give 
you the mac address of the router so you can be sure you're using the 
one you think you are.  It's a free app, so give it a try.  I've found 
it to be very useful for dealing with wifi routers and access points.

https://play.google.com/store/apps/details?id=com.farproc.wifi.analyzer

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Re: [CentOS] Two WiFi routers

[Bowie Bailey]

On 11/4/2015 11:45 AM, Timothy Murphy wrote:

Richard Zimmerman wrote:


Do you have them on different channels?

YES, definitely If you have the room in the spectrum, ch1, skip2, ch3,
skip 4, ch5, etc... I've actually have mine set with two empty channels
between them as the 3rd building is a machine / fabrication shop with lots
and lots of RFI going on.

So does a client laptop have to change NM setup
if passing from one router to another?

I wonder if one can specify a routers IP address to NM ?


If all of the routers are providing access to the same network, you can 
set up the same SSID, wifi password, and security type for all the 
routers and the clients should seamlessly switch between them as they 
move around.  Adjust the channels so that they aren't interfering with 
each other.  If you have an android device, there is an app called Wifi 
Analyzer that can show you a graph of all of the available wifi signals, 
their signal strength, and what channel they are on.


Just make sure there is only one device on the network providing DHCP.  
You can do it from one of the routers or elsewhere, but only one DHCP 
server per network.


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Re: [CentOS] yum does not update package list

[Bowie Bailey]

On 9/30/2015 8:15 PM, John R Pierce wrote:

On 9/30/2015 5:11 PM, Kommander Mighty Aura wrote:

Hello. I have been trying to add rpmforge as a repository, but yum does
not seem to be updating the package lists. I tried...


rpmforge is a dead repo, no longer maintained, I would not use for 
anything anymore.


rpmforge was renamed to repoforge, although they continued using the 
name rpmforge on the repos for some reason.  I use it on a few of my 
servers.


Poking around in the package lists, I can't find any that have been 
updated since July 2014.  Is repoforge now unmaintained?


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Re: [CentOS] OT: closing a port on home router

[Bowie Bailey]

On 9/12/2015 9:44 PM, Fred Smith wrote:


yes, there is port forwarding, of course. I'm forwarding a different
port to 22 on my desktop, and want to close 22 on the router so it won't
also allow access to 22 on my desktop.


If you have not set up forwarding for port 22 on the router, it is 
already closed.  You do not need to do anything.


If you want to verify this, just try to connect to port 22 from outside 
your network and see what happens.


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Re: [CentOS] BackupPC is not easy to setup

[Bowie Bailey]

On 9/18/2015 8:39 AM, Timothy Murphy wrote:

Bowie Bailey wrote:


On 9/13/2015 10:58 AM, Timothy Murphy wrote:

I take it then that there is no CLI method
of setting up and running BackupPC ?

Sure there is.  All of the configuration is stored in text config
files.  There is a main config file for global options and each host has
a config file in it's own directory.

Yes, it was pointed out to me that there are instructions in
<http://backuppc.sourceforge.net/faq/BackupPC.html>
in Step-7:-Talking-to-BackupPC.
I note that these instructions end by advising the user not to follow them,
but to set up the GUI method.

Incidentally, I've been running BackupPC on my CentOS-7 server
for about a week now, and I notice that no config file is created
in /var/lib/BackupPC/pc/helen, where helen is the host-name.
It seems the GUI method stores the config file somewhere else.


The GUI config editor is just an alternative to hand editing.  It uses 
the exact same files.


Keep in mind that the config files are stored separately from the 
backups.  On my system, the backups are under /data/BackupPC and the 
config files are under /etc/BackupPC.


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Re: [CentOS] BackupPC is not easy to setup

[Bowie Bailey]

On 9/13/2015 10:58 AM, Timothy Murphy wrote:


I take it then that there is no CLI method
of setting up and running BackupPC ?


Sure there is.  All of the configuration is stored in text config 
files.  There is a main config file for global options and each host has 
a config file in it's own directory.


Running BackupPC is simply a matter of starting the process.  There are 
various scripts available for manually starting backups and getting stats.


That said, the GUI is by far the easiest way to add new clients and look 
for failing backups or other issues.


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Re: [CentOS] rsync question

[Bowie Bailey]

On 9/11/2015 10:34 AM, Robert Moskowitz wrote:



On 09/11/2015 10:21 AM, C Linus Hicks wrote:

  On 09/10/15, Robert Moskowitz wrote:

--- Quoted text --
SSh is not parsing the port the way http does, it seems:

$ rsync -ah --stats root@192.168.129.2:613:/etc/dhcp/
/home/rgm/data/htt/httnet/homebase/new/dhcp
ssh: connect to host 192.168.129.2 port 22: No route to host
rsync: connection unexpectedly closed (0 bytes received so far) 
[Receiver]

rsync error: unexplained error (code 255) at io.c(226) [Receiver=3.1.1]

The reason why I change my SSH port is a simple way to keep port knocker
robots away. Different hosts use different ports...

-- End quote 

Oh, right, so you either need to put that in your .ssh/config file or 
use -e 'ssh -p 613' on the rsync command.


The config file should look like this:
Host 192.168.129.2
  Port 613


So we end up back needing the -e option or modifying the config file.

thanks for your time.  Really.


It's fairly common on technical lists like this for people to become 
fixated on minor problems or inefficiencies in a command or 
configuration when the actual issue is more complicated.  Try not to let 
it bother you too much.


As for your original question, I'm not sure why the files weren't copied 
as expected.  I ran your exact command with only the server names, port, 
and destination directory changed and all the files were copied.  You 
can try running the command without a destination and it should return a 
list of files found in the source directories.  If it doesn't list 
everything, there is some problem with how the source files are being 
specified or something preventing them from being read.  Selinux is 
always suspected in cases of strange permission problems.


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[CentOS] fsck mdraid root partition

[Bowie Bailey]

There are some errors on my root filesystem, so I need to fsck it. In 
order to do this while the filesystem is unmounted, I'm booting from the 
install disk.  However, since the filesystem is on an mdraid device, I'm 
not sure of the right way to get it assembled so I can check it.


If I do, mdadm --examine --scan, then I get this:

ARRAY /dev/md/2 metadata=...
(and others, but I'm only interested in md2 at this point)

It shows as /dev/md/2, while it is called /dev/md2 if I boot into the OS.

If I do this:

mdadm --assemble --scan /dev/md/2

I assume it will assemble it.  Is it going to cause and problems 
assembling it under a different name in order to run the fsck?


Should I rather force it to have the same name like this:

mdadm --assemble /dev/md2 /dev/sda1 /dev/sda2

if that will even work?

Thanks,

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Re: [CentOS] CentOS 5 grub boot problem

[Bowie Bailey]

On 8/7/2015 8:35 PM, Chris Murphy wrote:

On Fri, Aug 7, 2015 at 8:12 AM, Bowie Bailey bowie_bai...@buc.com wrote:

I tried the grub commands you gave and still got the same results. I also
have a copy of the SuperGrub disc, which is supposed to be able to fix grub
problems.  It can boot the drive, but it can't fix it.  If nothing else, I
guess I could just leave that disc in the drive and use it to boot the
system.

I'm going to do a fresh install to the new drives and see if that works.

I suppose it's worth a shot. But like I mentioned earlier, keep in
mind that CentOS 5 predates AF drives, so it will not correctly
partition these drives such that they have proper 8 sector alignment.


The fresh install will be with CentOS 6.  A quick test with a minimal 
install booted without any problems, so it looks like this is the solution.



If you haven't already, check the logic board firmware and the HBA
firmware for current updates.


I try to avoid firmware updates on established systems unless absolutely 
necessary.  Since the CentOS 6 install produces a bootable system, I'm 
going to leave it as-is.


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Re: [CentOS] CentOS 5 grub boot problem

[Bowie Bailey]

On 8/6/2015 5:11 PM, Chris Murphy wrote:

On Thu, Aug 6, 2015 at 2:57 PM, Bowie Bailey bowie_bai...@buc.com wrote:


Ok.  I'll give that a try tomorrow.  Just a couple of questions.

install --stage2=/boot/grub/stage2 /grub/stage1 d (hd0,1) /grub/stage2 p
(hd0,1)/grub/grub.conf

It looks like this mixes paths relative to root and relative to /boot.  Did
your test system have a separate /boot partition?

Yes.



The --stage2 argument is
os stage2 file according to my man page. Should this be relative to root
even with a separate /boot partition?

I think it's being treated as a directory because it's going to access
this stage2 file.


Also, why are the exact same root and install commands run twice in the log
you show?  Is that just a duplicate, or does it need to be run twice for
some reason?

I do not know. The whole thing is foreign to me. But both drives are
bootable as hd0 (the only drive connected). So it makes sense that the
configuration is treating this as an hd0 based installation of the
bootloader to both drives. The part were the stage 1 and 2 are
directed to separate drives must be the 'device (hd0) /dev/vdb'
command. Again, I don't know why it isn't either 'device (hd0) (hd1)'
or 'device /dev/vda /dev/vdb' but that's what the log sayeth.


I tried the grub commands you gave and still got the same results. I 
also have a copy of the SuperGrub disc, which is supposed to be able to 
fix grub problems.  It can boot the drive, but it can't fix it.  If 
nothing else, I guess I could just leave that disc in the drive and use 
it to boot the system.


I'm going to do a fresh install to the new drives and see if that works.

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Re: [CentOS] CentOS 5 grub boot problem

[Bowie Bailey]

On 8/6/2015 4:21 PM, Chris Murphy wrote:

On Thu, Aug 6, 2015 at 2:08 PM, Bowie Bailey bowie_bai...@buc.com wrote:


Doing a new install on the two 1TB drives is my current plan.  If that
works, I can connect the old drive, copy over all the data, and then try to
figure out what I need to do to get all the programs running again.

Sounds like a pain. I would just adapt the CentOS 6 program.log
commands for your case. That's a 2 minute test. And it ought to work.


I'm not familiar with that.  How would I go about adapting the CentOS 6 
program.log commands?



Clearly the computer finds the drive, reads the MBR and executes stage
1. The missing part is it's not loading or not executing stage 2 for
some reason. I'm just not convinced the bootloader is installed
correctly is the source of the problem with the 2nd drive. It's not
like the BIOS or HBA card firmware is going to faceplace right in
between stage 1 and stage 2 bootloaders executing. If there were a
problem there, the drive simply doesn't show up and no part of the
bootloader gets loaded.


Definitely a strange problem.  I'm hoping that doing a new install onto 
these drives rather than trying to inherit the install used on the 
smaller drives will work better.


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Re: [CentOS] CentOS 5 grub boot problem

[Bowie Bailey]

On 8/6/2015 4:55 PM, Leon Fauster wrote:

Am 06.08.2015 um 22:39 schrieb Leon Fauster leonfaus...@googlemail.com:

Am 06.08.2015 um 22:21 schrieb Chris Murphy li...@colorremedies.com:

On Thu, Aug 6, 2015 at 2:08 PM, Bowie Bailey bowie_bai...@buc.com wrote:


Doing a new install on the two 1TB drives is my current plan.  If that
works, I can connect the old drive, copy over all the data, and then try to
figure out what I need to do to get all the programs running again.

Sounds like a pain. I would just adapt the CentOS 6 program.log
commands for your case. That's a 2 minute test. And it ought to work.

Clearly the computer finds the drive, reads the MBR and executes stage
1. The missing part is it's not loading or not executing stage 2 for
some reason. I'm just not convinced the bootloader is installed
correctly is the source of the problem with the 2nd drive. It's not
like the BIOS or HBA card firmware is going to faceplace right in
between stage 1 and stage 2 bootloaders executing. If there were a
problem there, the drive simply doesn't show up and no part of the
bootloader gets loaded.


on which OS (eg. c5, c6) was the partition created?

s/partition/filesystem/


This is CentOS 5.

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Re: [CentOS] CentOS 5 grub boot problem

[Bowie Bailey]

On 8/6/2015 3:56 PM, Gordon Messmer wrote:

On 08/05/2015 08:12 AM, Bowie Bailey wrote:


This is an old system with only IDE ports.  There is an added 
Highpoint raid card which is used only for the two extra IDE ports.


Why extra?  Are there drives connected to this system other than the 
two you're discussing for the software RAID sets?


I know you said that you can't take the system down for an extended 
period of time.  Do you have enough time to connect the two 1TB drives 
and nothing else, and do a new install?  It would be useful to know if 
such an install booted, to exclude the possibility that there's some 
fundamental incompatibility between some combination of the BIOS, the 
Highpoint boot ROM, and the 1TB drives.


If it doesn't boot, you have the option of putting the bootloader, 
kernel, and initrd on some other media.  You could boot from an 
optical disc, or a USB drive, or CF.


To be honest, I don't remember why the Highpoint card was used.  It 
could be that I had originally intended to use the raid capabilities of 
the card, or maybe I just didn't want the two members of the mirror to 
be master/slave on the same IDE channel.


Doing a new install on the two 1TB drives is my current plan.  If that 
works, I can connect the old drive, copy over all the data, and then try 
to figure out what I need to do to get all the programs running again.


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Re: [CentOS] CentOS 5 grub boot problem

[Bowie Bailey]

On 8/6/2015 4:39 PM, Chris Murphy wrote:

On Thu, Aug 6, 2015 at 2:29 PM, Bowie Bailey bowie_bai...@buc.com wrote:

On 8/6/2015 4:21 PM, Chris Murphy wrote:

On Thu, Aug 6, 2015 at 2:08 PM, Bowie Bailey bowie_bai...@buc.com wrote:


Doing a new install on the two 1TB drives is my current plan.  If that
works, I can connect the old drive, copy over all the data, and then try
to
figure out what I need to do to get all the programs running again.

Sounds like a pain. I would just adapt the CentOS 6 program.log
commands for your case. That's a 2 minute test. And it ought to work.


I'm not familiar with that.  How would I go about adapting the CentOS 6
program.log commands?

I mentioned it in the last two posts yesterday on this subject.


Ok.  I'll give that a try tomorrow.  Just a couple of questions.

install --stage2=/boot/grub/stage2 /grub/stage1 d (hd0,1) /grub/stage2 p 
(hd0,1)/grub/grub.conf


It looks like this mixes paths relative to root and relative to /boot.  
Did your test system have a separate /boot partition?  The --stage2 
argument is os stage2 file according to my man page. Should this be 
relative to root even with a separate /boot partition?


Also, why are the exact same root and install commands run twice in the 
log you show?  Is that just a duplicate, or does it need to be run twice 
for some reason?


grub root (hd0,1)
grub install --stage2=/boot/grub/stage2 /grub/stage1 d (hd0,1) 
/grub/stage2 p (hd0,1)/grub/grub.conf

grub root (hd0,1)
grub install --stage2=/boot/grub/stage2 /grub/stage1 d (hd0,1) 
/grub/stage2 p (hd0,1)/grub/grub.conf


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[CentOS] CentOS 5 grub boot problem

[Bowie Bailey]

I am trying to upgrade my system from 500GB drives to 1TB.  I was able 
to partition and sync the raid devices, but I cannot get the new drive 
to boot.


This is an old system with only IDE ports.  There is an added Highpoint 
raid card which is used only for the two extra IDE ports. I have 
upgraded it with a 1TB SATA drive and an IDE-SATA adapter.  I did not 
have any problems with the system recognizing the drive or adding it to 
the mdraid.  A short SMART test shows no errors.


Partitions:
Disk /dev/hdg: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot  Start End  Blocks   Id  System
/dev/hdg1   1  25  200781   fd  Linux raid 
autodetect
/dev/hdg2  26  121537   976045140   fd  Linux raid 
autodetect
/dev/hdg3  121538  121601  514080   fd  Linux raid 
autodetect


Raid:
Personalities : [raid1]
md0 : active raid1 hdg1[1] hde1[0]
  200704 blocks [2/2] [UU]

md1 : active raid1 hdg3[1] hde3[0]
  513984 blocks [2/2] [UU]

md2 : active raid1 hdg2[1] hde2[0]
  487644928 blocks [2/2] [UU]

fstab (unrelated lines removed):
/dev/md2/   ext3 defaults1 1
/dev/md0/boot   ext3 defaults1 2
/dev/md1swapswap defaults0 0

I installed grub on the new drive:
grub device (hd0) /dev/hdg

grub root (hd0,0)
 Filesystem type is ext2fs, partition type 0xfd

grub setup (hd0)
 Checking if /boot/grub/stage1 exists... no
 Checking if /grub/stage1 exists... yes
 Checking if /grub/stage2 exists... yes
 Checking if /grub/e2fs_stage1_5 exists... yes
 Running embed /grub/e2fs_stage1_5 (hd0)...  15 sectors are embedded.
succeeded
 Running install /grub/stage1 (hd0) (hd0)1+15 p (hd0,0)/grub/stage2 
/grub/grub.conf... succeeded

Done.

But when I attempt to boot from the drive (with or without the other 
drive connected and in either IDE connector on the Highpoint card), it 
fails.  Grub attempts to boot, but the last thing I see after the bios 
is the line GRUB Loading stage 1.5, then the screen goes black, the 
system speaker beeps, and the machine reboots.  This will continue as 
long as I let it.  As soon as I switch the boot drive back to the 
original hard drive, It boots up normally.


I also tried installing grub as (hd1) with the same results.

A few Google searches haven't turned up any hits with this particular 
problem and all of the similar problems have been with Ubuntu and grub2.


Any suggestions?

Thanks,

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Re: [CentOS] CentOS 5 grub boot problem

[Bowie Bailey]

On 8/5/2015 11:27 AM, m.r...@5-cent.us wrote:

Bowie Bailey wrote:

I am trying to upgrade my system from 500GB drives to 1TB.  I was able
to partition and sync the raid devices, but I cannot get the new drive
to boot.

This is an old system with only IDE ports.  There is an added Highpoint
raid card which is used only for the two extra IDE ports. I have
upgraded it with a 1TB SATA drive and an IDE-SATA adapter.  I did not
have any problems with the system recognizing the drive or adding it to
the mdraid.  A short SMART test shows no errors.

snip
Trying to get your configuration clear in my mind - the drives are 1TB
IDE, and they're attached to the m/b, or to the Hpt RAID card?

Also, did you update the system? New kernel? If so, is the RAID card
recognized (we've got a Hpt RocketRaid card in a CentOS 6 system, and
we're *finally* replacing it with an LSI (once it comes in), because Hpt
does not care about old cards, and I had to find the source code, and then
hack it to compile it for the new kernel, and have had to recompile for
the new kernels we've installed


It was originally a pair of 500GB IDE drives in an mdraid mirror 
configuration.  Right now, I have removed one 500GB drive and replaced 
it with a 1TB SATA drive with an IDE-SATA adapter.  Both drives are 
connected to the Highpoint card and apparently working fine other than 
the boot-up problem.


I was considering adding an SATA card to the system, but I didn't want 
to deal with finding drivers for a card old enough to work with this 
system (32-bit PCI).


I have not done any updates to the system in quite some time.

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Re: [CentOS] CentOS 5 grub boot problem

[Bowie Bailey]

On 8/5/2015 11:52 AM, m.r...@5-cent.us wrote:

m.r...@5-cent.us wrote:

Bowie Bailey wrote:

I am trying to upgrade my system from 500GB drives to 1TB.  I was able
to partition and sync the raid devices, but I cannot get the new drive
to boot.

This is an old system with only IDE ports.  There is an added Highpoint
raid card which is used only for the two extra IDE ports. I have
upgraded it with a 1TB SATA drive and an IDE-SATA adapter.  I did not
have any problems with the system recognizing the drive or adding it to
the mdraid.  A short SMART test shows no errors.

snip
Trying to get your configuration clear in my mind - the drives are 1TB
IDE, and they're attached to the m/b, or to the Hpt RAID card?

Also, did you update the system? New kernel? If so, is the RAID card
recognized (we've got a Hpt RocketRaid card in a CentOS 6 system, and
we're *finally* replacing it with an LSI (once it comes in), because Hpt
does not care about old cards, and I had to find the source code, and then
hack it to compile it for the new kernel, and have had to recompile for
the new kernels we've installed


To follow myself up, I forgot one thing I'd intended to ask: is it
possible that you needed to rebuild the initrd?


It's possible, but why would that be the case?  The only thing that has 
changed from the OS point of view is the partition size on one of the 
drives.  The filesystems are still the same.


Also, as I said, it doesn't even get as far as attempting to boot 
Linux.  It fails immediately after the GRUB Loading stage 1.5 line, so 
it seems like a grub issue of some sort.


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Re: [CentOS] CentOS 5 grub boot problem

[Bowie Bailey]

On 8/5/2015 12:34 PM, Chris Murphy wrote:

On Wed, Aug 5, 2015 at 9:12 AM, Bowie Bailey bowie_bai...@buc.com wrote:

I am trying to upgrade my system from 500GB drives to 1TB.

I'm going to guess that there are no IDE drives that have 4096 byte
physical sectors, but it's worth confirming you don't have such a
drive because the current partition scheme you've posted would be
sub-optimal if it does have 4096 byte sectors.


The partition table was originally created by the installer.


  I was able to

partition and sync the raid devices, but I cannot get the new drive to boot.

This is an old system with only IDE ports.  There is an added Highpoint raid
card which is used only for the two extra IDE ports. I have upgraded it with
a 1TB SATA drive and an IDE-SATA adapter.  I did not have any problems with
the system recognizing the drive or adding it to the mdraid.  A short SMART
test shows no errors.

Partitions:
Disk /dev/hdg: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot  Start End  Blocks   Id  System
/dev/hdg1   1  25  200781   fd  Linux raid
autodetect
/dev/hdg2  26  121537   976045140   fd  Linux raid
autodetect
/dev/hdg3  121538  121601  514080   fd  Linux raid
autodetect

In the realm of totally esoteric and not likely the problem, 0xfd is
for mdadm metadata v0.9 which uses kernel autodetect. If the mdadm
metadata is 1.x then the type code ought to be 0xda but this is so
obscure that parted doesn't even support it. fdisk does but I don't
know when support was added. This uses initrd autodetect rather than
the deprecated kernel autodetect. It's fine to use 0.9 even though
it's deprecated.

You can use mdadm -E on each member device (each partition) to find
out what metadata version is being used.


Version : 0.90.00


Normally GRUB stage 1.5 is not needed, stage 1 can jump directly to
stage 2 if it's in the MBR gap. But your partition scheme doesn't have
an MBR gap, you've started the first partition at LBA 1. So that means
it'll have to use block lists...


I installed grub on the new drive:
grub device (hd0) /dev/hdg

grub root (hd0,0)
  Filesystem type is ext2fs, partition type 0xfd

grub setup (hd0)
  Checking if /boot/grub/stage1 exists... no
  Checking if /grub/stage1 exists... yes
  Checking if /grub/stage2 exists... yes
  Checking if /grub/e2fs_stage1_5 exists... yes
  Running embed /grub/e2fs_stage1_5 (hd0)...  15 sectors are embedded.
succeeded
  Running install /grub/stage1 (hd0) (hd0)1+15 p (hd0,0)/grub/stage2
/grub/grub.conf... succeeded
Done.

I'm confused. I don't know why this succeeds because the setup was
pointed to hd0, which means the entire disk, not a partition, and yet
the disk doesn't have an MBR gap. So there's no room for GRUB stage 2.


I'm not sure.  It's been so long that I don't remember what I did (if 
anything) to get grub working on the second drive of the set. The first 
drive was configured by the installer.


What I'm doing now is what I found to work for my backup system which 
gets a new drive in the raid set every month.



But when I attempt to boot from the drive (with or without the other drive
connected and in either IDE connector on the Highpoint card), it fails.
Grub attempts to boot, but the last thing I see after the bios is the line
GRUB Loading stage 1.5, then the screen goes black, the system speaker
beeps, and the machine reboots.  This will continue as long as I let it.  As
soon as I switch the boot drive back to the original hard drive, It boots up
normally.

Yeah it says it's succeeding but it really isn't, I think. The problem
is not the initrd yet, because that could be totally busted or
missing, and you should still get a GRUB menu. This is all a failure
of getting to stage 2, which then can read the file system and load
the rest of its modules.



I also tried installing grub as (hd1) with the same results.

I'm disinclined to believe that hd0 or hd1 translate into hdg, but I
forget how to list devices in GRUB legacy. I'm going to bet though
that device.map is stale and it probably needs to be recreated, and
then find out what the proper hdX is for hdg. And then I think you're
going to need to point it at a partition using hdX,Y.


I'm willing to give that a try.  The device.map looks good to me:
(hd0) /dev/hde
(hd1) /dev/hdg

It is old, but the drives are still connected to the same connectors, so 
it should still be valid.


How would I go about pointing it at the partition?

What I am currently doing is this:
device (hd0) /dev/hdg
root (hd0,0)
setup (hd0)

Would I just need to change the setup line to setup (hd0,0), or is 
there more to it than that?


Also, the partitions are mirrored, so if I install to a partition, I 
will affect the working drive as well.  I'm not sure I want to risk 
breaking the setup that still works.  I can take this machine down

Re: [CentOS] CentOS 5 grub boot problem

[Bowie Bailey]

On 8/5/2015 12:37 PM, Chris Murphy wrote:

On Wed, Aug 5, 2015 at 10:34 AM, Chris Murphy li...@colorremedies.com wrote:

On Wed, Aug 5, 2015 at 9:12 AM, Bowie Bailey bowie_bai...@buc.com wrote:

I am trying to upgrade my system from 500GB drives to 1TB.

I'm going to guess that there are no IDE drives that have 4096 byte
physical sectors, but it's worth confirming you don't have such a
drive because the current partition scheme you've posted would be
sub-optimal if it does have 4096 byte sectors.

Oops. I just reread that this is now SATA. New versions of hdparm and
smartctl can tell you if the drive is Advanced Format, and if it is,
then I recommend redoing the partition scheme so it's 4K aligned. And
so that it has an MBR gap. The current way to do this is have the 1st
partition start at LBA 2048.


I tried 'smartctl -a' and 'hdparm -I', but I don't see anything about 
Advanced Format.  What am I looking for?


I can redo the partitions, but I'm not sure how to tell fdisk to start a 
partition at LBA 2048.


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Re: [CentOS] CentOS 5 grub boot problem

[Bowie Bailey]

On 8/5/2015 1:00 PM, Chris Murphy wrote:

On Wed, Aug 5, 2015 at 10:52 AM, Bowie Bailey bowie_bai...@buc.com wrote:

How would I go about pointing it at the partition?

What I am currently doing is this:
device (hd0) /dev/hdg
root (hd0,0)
setup (hd0)


setup (hd1,0)

It's hd1 if your device map is correct and hdg is hd1. And then ,0 is
for the first partition assuming that's an ext3 boot partition.


What I am doing on my other system (where everything is working), is 
forcing grub to install to both drives as hd0.  I found that when the 
first drive dies and I remove it from the system, grub will see the 
remaining drive as hd0, regardless of what it was before.  So if I 
install grub to the second disk as hd1, then it won't boot as a single 
drive.


And to get this back to a single thread:

On 8/5/2015 1:03 PM, Chris Murphy wrote:

On Wed, Aug 5, 2015 at 10:58 AM, Bowie Bailey bowie_bai...@buc.com wrote:


I tried 'smartctl -a' and 'hdparm -I', but I don't see anything about
Advanced Format.  What am I looking for?

# smartctl -i /dev/hdg | grep -i sector
Sector Size:  512 bytes logical/physical


I don't get a Sector Size line.

smartctl version 5.38 [i686-redhat-linux-gnu] Copyright (C) 2002-8 Bruce 
Allen

Home page is http://smartmontools.sourceforge.net/

=== START OF INFORMATION SECTION ===
Device Model: WDC WD10EZEX-60M2NA0
Serial Number:WD-WCC3F6AX0119
Firmware Version: 03.01A03
User Capacity:1,000,204,886,016 bytes
Device is:Not in smartctl database [for details use: -P showall]
ATA Version is:   9
ATA Standard is:  Not recognized. Minor revision code: 0x1f
Local Time is:Wed Aug  5 13:09:16 2015 EDT
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

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Re: [CentOS] CentOS 5 grub boot problem

[Bowie Bailey]

On 8/5/2015 1:30 PM, Chris Murphy wrote:

Please, download this.
http://sourceforge.net/projects/bootinfoscript/

Run it:
http://bootinfoscript.sourceforge.net/

Post a URL to the resulting file somewhere. I suggest having the
entire computer assembled as it should be in normal use, rather than
simulating device failure by removing a device.


http://pastebin.com/sgWTYpp4

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Re: [CentOS] CentOS 5 grub boot problem

[Bowie Bailey]

On 8/5/2015 4:00 PM, Chris Murphy wrote:

- Ahh OK now I see why I was confused. The originally posted partition
map uses cylinders as units, not LBA. I missed that. Cylinder 1 is the
same as LBA 63. And that is sufficiently large for a GRUB legacy stage
2.

- OK this is screwy. Partitions 1 and 3 on both drives have the same
number of sectors, but partitions 2 differ:

/dev/hde2 401,625   975,691,709   975,290,085  fd Linux
raid autodetect
/dev/hdg2 401,625 1,952,491,904 1,952,090,280  fd Linux
raid autodetect

That can't work as these are two partitions meant to form /dev/md2 and
need to be the same size.


That's because I'm intending to increase the size of that filesystem.  
The raid should work as long as the new partition is at least as big as 
the old one.  Once I get this working, I will remove the original drive 
and add another 1TB drive so both partitions are the same (larger size) 
and extend the filesystem into the new space.



- Also, 401625 is not 8 sector aligned. So it's a double whammy and
since it has to be repartitioned anyway you might as well fix the
alignment also.

First off fail+remove hdg2 (you need to confirm I've got the devices
and commands right here):
mdadm --manage /dev/md2 -f /dev/hdg2 -r /dev/hdg2
mdadm --zero-superblock /dev/hdg2

Using fdisk delete hdg2, then make a new primary partition (partition
2) and hopefully figure out how to get it to do LBA rather than CHS
entry; or use parted which can but it's UI is totally unlike fdisk.
The start sector for hdg2 should be 401623 which is 8 sector aligned,
and the end value should be 975691717 in order to make it the same as
hde2. And change the type to 0xfd.

Now you probably have to reboot because the partition map has changed,
I'm not sure if partprobe exists on CentOS5, could be worth a shot
though and see if the kernel gets the new partition map. Check with
blkid.

And then finally add the new device.
mdadm --managed /dev/md2 -a /dev/hdg2

And now it should be resyncing...
cat /proc/mdstat


But if both hde and hdg are using 401625, then wouldn't I have to 
repartition both drives so the sizes match?


I'm still not sure that this is a partitioning problem.  I did not have 
any problems create the partitions or syncing the three raid devices.


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Re: [CentOS] CentOS 5 grub boot problem

[Bowie Bailey]

On 8/5/2015 3:59 PM, m.r...@5-cent.us wrote:

Dumb thought: I don't remember how, other than from a grub menu, but I'm
pretty sure there's a way to default boot into a grub shell. Once there,
you can see, using file completion, the drives, and where your initrd is.


Good thought.  I went into the grub.conf, commented out the hiddenmenu 
option and increased the timeout to 10 seconds.  This works if I boot 
from the original drive, but it doesn't help with the new drive.  It's 
not getting that far.


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Re: [CentOS] CentOS 5 grub boot problem

[Bowie Bailey]

On 8/5/2015 4:40 PM, Chris Murphy wrote:

On Wed, Aug 5, 2015 at 1:59 PM,  m.r...@5-cent.us wrote:

Dumb thought: I don't remember how, other than from a grub menu, but I'm
pretty sure there's a way to default boot into a grub shell. Once there,
you can see, using file completion, the drives, and where your initrd is.

It's definitely not an initrd problem. a.) the failure happens before
the GRUB menu appears so it hasn't even gone looking for an initrd,
b.) the initrd is technically on an array not a device, and as long as
the array is sync'd on both devices, it's the same, and since it works
on one device, it should work on the other and c.) it's v0.9 mdadm
metadata which is kernel autodetect so the initrd doesn't do the
assembly.

I think once the partition stuff is fixed, and synced, then it will be
more reliable to do this because GRUB is after all being pointed to
member devices, not the array.

There might be more luck using this command at command prompt:

grub-install --recheck /dev/hdg

See if that repopulates the device.map correctly. It should use /boot
(/dev/md0) automatically for stage2.


Can't risk killing the system at the moment.  I'll give it a try tomorrow.

However, I do note that the man page for grub-install has a comment 
about --recheck stating This option is unreliable and its use is 
strongly discouraged.


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Re: [CentOS] SATA adapter recommendation

[Bowie Bailey]

On 7/28/2015 12:26 PM, Bill Maltby (C4B) wrote:

On Mon, 2015-07-27 at 11:06 -0400, Bowie Bailey wrote:

I have an old computer running CentOS 5.  I need to add an SATA drive to
it, but it doesn't have any ports, so I need an add-on card.  The board
only has a 32-bit PCI slot.  Any recommendations on cards/brands that
work well with CentOS?  I don't need any raid capabilities, I just need
a couple of SATA connections.

Thanks,


Have you considered this
http://www.startech.com/HDD/Adapters/Bi-Directional-SATA-IDE-Adapter-Converter~PATA2SATA3

I'm using the PATA2SATA3 and am well pleased.

They also have a uni-directional (meaning it adapts in one direction -
data flows both ways of course) one if that meets you needs.


I considered that one, but it looks like it needs to plug directly into 
the IDE connector, and there isn't enough room to have a 2 device 
plugged in there (2U case with a horizontally-mounted IDE card).  I 
decided on one that plugs directly into the SATA drive instead.


http://www.startech.com/HDD/Adapters/25in-and-35in-40-Pin-Male-IDE-to-SATA-Adapter-Converter~IDE2SAT2

Thanks for the suggestions, everyone!

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[CentOS] SATA adapter recommendation

[Bowie Bailey]

I have an old computer running CentOS 5.  I need to add an SATA drive to 
it, but it doesn't have any ports, so I need an add-on card.  The board 
only has a 32-bit PCI slot.  Any recommendations on cards/brands that 
work well with CentOS?  I don't need any raid capabilities, I just need 
a couple of SATA connections.


Thanks,

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Re: [CentOS] SATA adapter recommendation

[Bowie Bailey]

On 7/27/2015 12:29 PM, g wrote:


On 07/27/15 10:06, Bowie Bailey wrote:

I have an old computer running CentOS 5.  I need to add an SATA drive to
it, but it doesn't have any ports, so I need an add-on card.  The board
only has a 32-bit PCI slot.  Any recommendations on cards/brands that
work well with CentOS?  I don't need any raid capabilities, I just need
a couple of SATA connections.


.
i hope certain others will excuse my reply to you OT post.

instead of a pci slot board, i purchased a board that is an ide/pata to
dual sata converter.

card connects to ribbon cable dip connector on main board, giving 2 sata
connections. works great.

an inet search for 'ide/pata to sata converter' will give plenty of hits.

card i purchased;

http://www.startech.com/HDD/Adapters/IDE-to-SATA-Adapter-Converter~PATA2SATA2

card is available thru many computer accessory suppliers which one will
find with web search of ide/pata to sata.


That's not a bad idea.  I'll have to take a look at the case and see if 
I have room for something like that.


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Re: [CentOS] SATA adapter recommendation

[Bowie Bailey]

On 7/27/2015 3:52 PM, g wrote:


On 07/27/15 13:25, Bowie Bailey wrote:

On 7/27/2015 12:29 PM, g wrote:




http://www.startech.com/HDD/Adapters/IDE-to-SATA-Adapter-Converter~PATA2SATA2

card is available thru many computer accessory suppliers which one will
find with web search of ide/pata to sata.

That's not a bad idea.  I'll have to take a look at the case and see if
I have room for something like that.


,
if you click on the tab for tech specs, you will see that card is rather
small, so you should not have a room problem.

check the other tabs also.


I ordered a slightly different version that will plug directly into the 
SATA drive and provide an IDE connector.


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Re: [CentOS] creating RPMs from CRAN tarballs

[Bowie Bailey]

On 6/5/2015 3:09 AM, Peter wrote:

On 06/04/2015 07:49 AM, Tony Schreiner wrote:

I run R2spec -s tarball  to create a spec file, and most of the time it
works ok, but sometimes (RPostgresSQL, Rcpp for example) the package has
test or example programs that  start with

#!/usr/bin/r

with lower case r, and the resulting package then winds up with a
dependency on /usr/bin/r, which can't be resolved.

So far I have solved it by editing all the files and replacing with
/usr/bin/R, recreating the tarball and going through the process again, but
I have to believe there is an easier way.

Kind of.  This is an obvious error in the packaged scripts in the
tarballs.  I generally don't recommend modifying the original tarball as
I like it to be a true representation of the tarball source that you get
from upstream.  What I do instead is patch it in the spec file.

In this case it would probably be easier to do one line of perl or awk
that patches the shebang line in all the scripts at build time than it
would be to generate individual patch files for each source tarball.
You would add this to the %prep stage of the spec files, something like
this after the initial %setup macro:

perl -pi -e 's:^#!/usr/bin/r:#!/usr/bin/R: unless $i++'
path/to/R/scripts/*.R


I assume the unless $i++ is supposed to limit the replace operation to 
only the first line each file.  Unfortunately, since it is a global 
variable, it is actually limiting it to only the first line of the first 
file.  I'm not sure how you would fix this using the -p option.  You 
would probably have to write out the loop manually in order to localize 
the variable properly.


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Re: [CentOS] Command line mp3 player

[Bowie Bailey]

On 5/22/2015 5:01 PM, Frank Cox wrote:

On Fri, 22 May 2015 16:20:15 -0400
Bowie Bailey wrote:


Any suggestions as to where to go from here?

What is your audio device?  Are you sure it's supported?

(The lshw command will tell you what hardware you have.)


Supported by what?  OS, or mpg123?

I don't have the lshw command.  However, I did find this:

/proc/asound/cards:
 0 [Intel  ]: HDA-Intel - HDA Intel
  HDA Intel at 0xfc1a irq 42

/proc/asound/Intel/pcm0p/info:
card: 0
device: 0
subdevice: 0
stream: PLAYBACK
id: ALC888 Analog
name: ALC888 Analog
subname: subdevice #0
class: 0
subclass: 0
subdevices_count: 1
subdevices_avail: 1

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Re: [CentOS] Command line mp3 player

[Bowie Bailey]

On 5/27/2015 4:30 PM, m.r...@5-cent.us wrote:

Bowie Bailey wrote:

On 5/22/2015 5:01 PM, Frank Cox wrote:

On Fri, 22 May 2015 16:20:15 -0400
Bowie Bailey wrote:


Any suggestions as to where to go from here?

What is your audio device?  Are you sure it's supported?

(The lshw command will tell you what hardware you have.)

Supported by what?  OS, or mpg123?

I don't have the lshw command.  However, I did find this:

yum -y install lshw. It's nice. Slower to start than dmidecode, but much
easier to read. And you can tell it to give you just some info, such as
lshw -c storage


That makes sense.  I'm doing too many things at once right now...it 
didn't even occur to me to try to install it from yum.


Here's what I get.

*-multimedia
 description: Audio device
 product: 82801I (ICH9 Family) HD Audio Controller
 vendor: Intel Corporation
 physical id: 1b
 bus info: pci@:00:1b.0
 version: 02
 width: 64 bits
 clock: 33MHz
 capabilities: pm msi pciexpress bus_master cap_list
 configuration: driver=snd_hda_intel latency=0
 resources: irq:42 memory:fc1a-fc1a3fff

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Re: [CentOS] Command line mp3 player

[Bowie Bailey]

On 5/22/2015 3:29 PM, Gordon Messmer wrote:

On 05/22/2015 12:10 PM, Bowie Bailey wrote:

mplayer is pulling in 83 dependencies!  I think I'll look for something
a bit more self-contained.


I don't understand that reaction to packaging.  mplayer uses a variety 
of libraries to support a large variety of media types. It doesn't 
include servers or SUID binaries, so it doesn't carry a significant 
security risk, and it doesn't consume much disk space.  It doesn't 
make any more sense that complaining about the number of files in a 
package. (NOTE: filesystem contains 15000+ files!  DON'T REMOVE IT!)


If you want to support mp3 only, then try mpg123 or madplay
http://www.mpg123.de/index.shtml
http://www.underbit.com/products/mad/


mpg123 installed from the nux repo and runs, but I'm not getting any 
audio.  It looks like I may be missing drivers or something.  When I run 
mpg123 in verbose mode, I get this:


Audio driver: alsa
Audio device: none

Any suggestions as to where to go from here?

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[CentOS] Command line mp3 player

[Bowie Bailey]

I have a CentOS 7 server that I want to use as an audio source for our 
hold music.  It does not have a GUI installed, so I am looking for a 
program with a command line interface that will let me play a folder 
full of mp3 files on a continuous loop.


MOC seems to do what I want, but I can't find a build for CentOS 7. Is 
there another program that I can use for this?


Thanks.

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Re: [CentOS] Command line mp3 player

[Bowie Bailey]

On 5/22/2015 3:01 PM, Richard wrote:


 Original Message 

Date: Friday, May 22, 2015 11:52:43 AM -0700
From: Kirk Bocek t...@kbocek.com

On May 22, 2015 11:46:23 AM PDT, Bowie Bailey
bowie_bai...@buc.com wrote:

I have a CentOS 7 server that I want to use as an audio source
for our  hold music.  It does not have a GUI installed, so I am
looking for a  program with a command line interface that will
let me play a folder  full of mp3 files on a continuous loop.

MOC seems to do what I want, but I can't find a build for CentOS
7. Is  there another program that I can use for this?

Thanks.

This something I used years ago:

http://mpg321.sourceforge.net/

Don't know if it works on CentOS 7 anymore.


I think you can do that with mplayer, but you may need to build a
playlist first in order to play more than one file. It just worked
fine, in commandline, playing one specific file. I didn't try to
figure out commandline playlist building.

The nux repository, mentioned at the top of this centos wiki page,
has mplayer (and a bunch of other audio-related things).

  http://wiki.centos.org/TipsAndTricks/MultimediaOnCentOS7


mplayer is pulling in 83 dependencies!  I think I'll look for something 
a bit more self-contained.


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Re: [CentOS] firewalld trouble opening a port

[Bowie Bailey]

On 5/9/2015 3:24 PM, Tim Dunphy wrote:

Hi Earl,


The problem is you added the rule in runtime and when you reloaded it
removed the rule that you added; therefore you need to use --permanent or
do not reload.

Thanks! That worked.

[root@appd:~] #firewall-cmd --zone=home --list-ports
[root@appd:~] #firewall-cmd --zone=home --add-port=8181/tcp --permanent
success
[root@appd:~] #firewall-cmd --reload
success
[root@appd:~] #firewall-cmd --zone=home --list-ports
8181/tcp


Just remember that the permanent command doesn't add the rule 
immediately, so it doesn't take effect *until* you reload.


you can also do this:

# firewall-cmd --zone=home --add-port=8181/tcp
# add other stuff
Test that everything works right
# firewall-cmd --runtime-to-permanent

That way, if you screw something up, you can simply reload (or reboot) 
to fix it.


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Re: [CentOS] openvpn and firewalld

[Bowie Bailey]

On 5/9/2015 8:32 AM, James B. Byrne wrote:

On Fri, May 8, 2015 12:06, Bowie Bailey wrote:


Replying to myself here, I finally figured out how to do it with
direct rules.  Firewalld on CentOS 7 defaults to a drop rule for
the FORWARD chain which my previous server didn't have.  So I
needed to put the rules in the FORWARD chain rather than the
INPUT chain.


This does not make sense to me.  The INPUT, OUTPUT and FORWARD chains
are swimlanes. A packet starts out, following PREROUTING, in exactly
one of these three and never leaves it.  It can JUMP to shared chains
but it will always return to its original chain until ACCEPTed,
DROPped or REJECTed.


I was a bit confused when I originally posted.  This is the only machine 
that does forwarding and I haven't touched the iptables setup on it in 
years.


The original machine had a shared chain between INPUT and FORWARD with 
rules that allowed the traffic.  I had forgotten how the INPUT and 
FORWARD chains worked and didn't realize at first that this was a shared 
chain, so I was putting the rules in the INPUT chain on the new box, 
which (of course) didn't work.


The other thing that caught me was that the new box has a reject rule at 
the end of the FORWARD chain that I didn't notice until I did an 
iptables-save and combed through the rules.  Is there a better way to 
get an overview of ALL the rules with firewalld?  None of the 
firewall-cmd options that I can find will show me that there is a reject 
rule on the FORWARD chain.


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[CentOS] openvpn and firewalld

[Bowie Bailey]

I am trying to build a new openvpn server based on CentOS7. Everything 
is working fine as long as I disable firewalld.  With firewalld enabled, 
I can connect to the vpn and ping the machines on the network, but I am 
unable to ssh to them.


What I had on my old server with iptables was two simple rules:

-A RH-Firewall-1-INPUT -s localnet/255.255.0.0 -d vpnnet/255.255.0.0 
-j ACCEPT
-A RH-Firewall-1-INPUT -s vpnnet/255.255.0.0 -d localnet/255.255.0.0 
-j ACCEPT


This allowed all traffic to flow between my vpn subnet and the local 
network.  How can I duplicate this behavior with firewalld?


I even tried using the --direct option to put in these same rules 
without success.  Although I may not have done it quite right -- 
firewalld seems to have added 20 extra chains to the rule structure and 
I'm not sure exactly where I should put these rules.


Unfortunately, I cannot easily debug this while I'm at the office, but 
if you can give me any suggestions, I can try them out when I get home 
tonight.


Thanks!

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Re: [CentOS] openvpn and firewalld

[Bowie Bailey]

On 5/8/2015 9:34 AM, Bowie Bailey wrote:
I am trying to build a new openvpn server based on CentOS7. Everything 
is working fine as long as I disable firewalld.  With firewalld 
enabled, I can connect to the vpn and ping the machines on the 
network, but I am unable to ssh to them.


What I had on my old server with iptables was two simple rules:

-A RH-Firewall-1-INPUT -s localnet/255.255.0.0 -d 
vpnnet/255.255.0.0 -j ACCEPT
-A RH-Firewall-1-INPUT -s vpnnet/255.255.0.0 -d 
localnet/255.255.0.0 -j ACCEPT


This allowed all traffic to flow between my vpn subnet and the local 
network.  How can I duplicate this behavior with firewalld?


Replying to myself here, I finally figured out how to do it with direct 
rules.  Firewalld on CentOS 7 defaults to a drop rule for the FORWARD 
chain which my previous server didn't have.  So I needed to put the 
rules in the FORWARD chain rather than the INPUT chain.


The rules may not have been necessary on the old server since FORWARD 
defaulted to accept, but they would have worked anyway because the 
RH-Firewall-1-INPUT chain was referenced by both the INPUT and FORWARD 
chains.


I'm still trying to sort out how to do this using firewalld's normal or 
rich rules.  So far, no success.  I'm not sure how to affect the FORWARD 
chain with firewalld.


Right now, I have:

# firewall-cmd --direct --get-all-rules
ipv4 filter FORWARD 0 -s localnet/255.255.0.0 -d vpnnet/255.255.0.0 
-j ACCEPT
ipv4 filter FORWARD 0 -s vpnnet/255.255.0.0 -d localnet/255.255.0.0 
-j ACCEPT


So how can I duplicate this behavior without using direct rules?

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Re: [CentOS] OT: Recommended anti-virus for Windows

[Bowie Bailey]

On 4/2/2015 5:11 PM, J Martin Rushton wrote:

Sorry to mention the opposition here, but I have a family member's
laptop to protect, and I'm not allowed to upgrade it to Linux.  What's
the current best recommendation?


I have used Avast, AVG, Avira, and Comodo.

Currently Comodo (firewall and antivirus) is on all of my systems.

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Re: [CentOS] Another Fedora decision

[Bowie Bailey]

On 2/5/2015 8:20 PM, Always Learning wrote:

On Fri, 2015-02-06 at 10:50 +1100, Kahlil Hodgson wrote:


On 6 February 2015 at 10:23, Always Learning cen...@u64.u22.net wrote:

Logically ?

1. to change the permissions on shadow from -rw-x-- or from
-- to -rw-r--r-- requires root permissions ?

2. if so, then what is the advantage of changing those permissions when
the entity possessing root authority can already read shadow - that
entity requires neither group nor user permissions to read shadow.

The concept in play here is privilege escalation.

An exploit may not give you all that root can do, but may be limited
to, say, tricking the system to change file permission.
 From there an attacker could use that and other exploits to escalate 
privileges.

How could file permission modification of /etc/shadow be used to
escalate privileges ?


If I can give myself read access to /etc/shadow, then I can grab a copy 
and try to crack the passwords (including the root password). If I can 
give myself r/w access, then I can directly change the password and give 
myself instant access to everything.


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Re: [CentOS] Samba guest no write access after update to samba -3.6.23-12.el6.x86_64

[Bowie Bailey]

On 11/6/2014 1:05 PM, Mike Watson wrote:

I have an established server initially created with CentOS 6.5 and
updated weekly. Last week there was a massive update that I believe
upgraded my server to 6.6.

I had a number of issues after the upgrade---like my firewall being
turned on and blocking all inbound ports. (I have an external firewall.)
I've fixed all the issues created by this upgrade except for one.

I have a number of samba shares on this server used by some WinXP boxes
on my network and two other linux (Fedora) workstations. Since the
upgrade, guest/nobody write access no longer works. The smb.conf file is
unchanged.

The config file below has been unchanged since my initial installation.
Anyone know how I can restore guest write access? Guest can read, but
not write to the share.


I don't see anything obvious.  The first thing I would do is to take a 
look at 'smbstatus' while a guest user is logged on and make sure it is 
connecting as the user you expect.


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Re: [CentOS] automated smtp server check

[Bowie Bailey]

On 11/4/2014 7:35 PM, Frank Cox wrote:

On Tue, 4 Nov 2014 23:41:36 +0100
Leon Fauster wrote:


mon - old lady but small:

It looks really cool, but boy does it have a list of dependencies:

fping is needed by mon-1.2.0-8.el7.centos.x86_64
perl(Authen::PAM) is needed by mon-1.2.0-8.el7.centos.x86_64
perl(Authen::Radius) is needed by mon-1.2.0-8.el7.centos.x86_64
perl(CGI) is needed by mon-1.2.0-8.el7.centos.x86_64
perl(DBI) is needed by mon-1.2.0-8.el7.centos.x86_64
perl(Expect) is needed by mon-1.2.0-8.el7.centos.x86_64
perl(Mon::Client) is needed by mon-1.2.0-8.el7.centos.x86_64
perl(Net::DNS) is needed by mon-1.2.0-8.el7.centos.x86_64
perl(Net::DNS::Packet) is needed by mon-1.2.0-8.el7.centos.x86_64
perl(Net::DNS::RR) is needed by mon-1.2.0-8.el7.centos.x86_64
perl(Net::DNS::Resolver) is needed by mon-1.2.0-8.el7.centos.x86_64
perl(Net::LDAP) is needed by mon-1.2.0-8.el7.centos.x86_64
perl(Net::SNPP) is needed by mon-1.2.0-8.el7.centos.x86_64
perl(Net::Telnet) is needed by mon-1.2.0-8.el7.centos.x86_64
perl(SNMP) is needed by mon-1.2.0-8.el7.centos.x86_64
perl(SNMP) = 1.8 is needed by mon-1.2.0-8.el7.centos.x86_64
perl(Statistics::Descriptive) is needed by mon-1.2.0-8.el7.centos.x86_64
perl(Sys::Syslog) is needed by mon-1.2.0-8.el7.centos.x86_64
perl(Time::HiRes) is needed by mon-1.2.0-8.el7.centos.x86_64
perl(Time::Period) is needed by mon-1.2.0-8.el7.centos.x86_64


It's a Perl program designed to test a bunch of different services. Of 
course it's going to require the Perl modules needed to do those queries.


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Re: [CentOS] find troubles

[Bowie Bailey]

On 10/28/2014 5:32 PM, Robert Nichols wrote:

On 10/28/2014 04:00 PM, Tim Dunphy wrote:

Hey guys,

  Sorry not sure what's wrong with this statement. I've tried a few
variations of trying to exclude the /var/www directory.


[root@224432-24 apr-1.5.1]# find / -name *httpd* -type d \( ! -name 
www \)

/usr/lib/httpd
/usr/lib64/httpd
/var/www/vhosts/johnnyenglish/httpdocs
/var/www/lpaddevbkp/alchemist/namespace/system-config-httpd
/var/www/lpaddevbkp/httpd


Well, no name that matches *httpd* will also match www, so that last
term will never match.  What you want is the prune action:

  find / -name www -prune -o -name *httpd*


Or use -path instead of -name.

Your original find statement should work with the -path test.

find / -name *httpd* -type d \( ! -path /var/www \)

but combining it with -prune is more efficient since it excludes the 
whole directory tree instead of individually excluding each file.


find / -path /var/www -prune -o -name *httpd*

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Re: [CentOS] Wow! Double wow!

[Bowie Bailey]

On 10/29/2014 11:43 AM, Beartooth wrote:

On Wed, 29 Oct 2014 09:22:35 -0500, Valeri Galtsev wrote:


On Wed, October 29, 2014 9:06 am, Steve Clark wrote:

+100


Me too. I was [mistakenly, apparently] always considering 5.[n+1],
6.[m+1] just re-spins, thus providing latest packages with _backported_

security

patches/bugfixes, aimed at providing installation media that is not
entail millions of updates. Releases with newer versions, drivers
included in kernel shuffled, the new kernel (without any necessity in
it) which causes hassle to reboot the box... This all effectively
defeats the Enterprise portion of the name of the system, doesn't it?

Do not take it as me not being appreciative of the great job the
distribution maintainers do. I'm just trying to give a view of us,
users who have to deal with the consequences...

Looking back over the list of packages installed, I notice that
most end in el6, but there are some with el6_6. Does that mean she's
now actually running 6.6 rather than 6.5?


She is running CentOS 6 with all current updates.  This currently 
equates to 6.6.


RHEL, and therefore CentOS, does not support maintaining a specific 
point release version.  Updating any CentOS 6 system will now result in 
an update to 6.6.  It is possible to prevent the 6.6 updates from being 
installed, but this will leave you with no further updates (security or 
otherwise).



I've been wondering when it would be best to switch to CentOS 7.
Is there something like fedup in Fedora to do it, or is a fresh install
the only way?


There is a method to upgrade (there was a recent thread about it in this 
group), but the recommended method is to install from scratch.


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Re: [CentOS] Samba 4.1.6

[Bowie Bailey]

On 10/18/2014 8:06 AM, Arun Khan wrote:

On Sat, Oct 18, 2014 at 1:21 AM, Bowie Bailey bowie_bai...@buc.com wrote:

Can this package coesist with the current Samba package, or do I need to
remove the CentOS Samba package first?

Both packages would want to use the same ports netbios ports.


I understand that.  But if they install into different locations, I 
should theoretically be able to have them both installed as long as I 
don't try to have both of them active at the same time.  That's really 
what I was asking -- Does the Sernet package install into the same 
location as the base Samba package or are there package dependencies 
that would prevent it from being installed alongside the base package?


But it's a moot point for me now since I've found a way around the 
problem I was hoping to solve by switching to 4.1.6.


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[CentOS] Samba 4.1.6

[Bowie Bailey]

I just installed a CentOS 7 server and ran into a problem with Samba and 
the force user option.  Apparently, there was a fix for some force 
user issues in the 4.1.6 release.


Is there any likelihood of an update from upstream?  If not, is there 
another repo that provides a more up-to-date version of Samba?


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Re: [CentOS] Samba 4.1.6

[Bowie Bailey]

On 10/17/2014 2:56 PM, m...@tdiehl.org wrote:

On Fri, 17 Oct 2014, Bowie Bailey wrote:


I just installed a CentOS 7 server and ran into a problem with Samba and the
force user option.  Apparently, there was a fix for some force user
issues in the 4.1.6 release.

Is there any likelihood of an update from upstream?  If not, is there another
repo that provides a more up-to-date version of Samba?

Have a look at http://www.sernet.de/en/samba/enterprisesamba/

Their rpms have the latest and greatest samba versions.


That looked great until I got signed in and realized that they do not 
yet have CentOS 7 packages...


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Re: [CentOS] Samba 4.1.6

[Bowie Bailey]

On 10/17/2014 3:32 PM, Ray Van Dolson wrote:

On Fri, Oct 17, 2014 at 01:22:46PM -0600, Frank Cox wrote:

On Fri, 17 Oct 2014 15:12:30 -0400
Bowie Bailey wrote:


That looked great until I got signed in and realized that they do not
yet have CentOS 7 packages...

I don't need this so I didn't register and so on, but I'm wondering
if they offer a source rpm package on that site that you might be
able to compile yourself?

They do.

https://download.sernet.de/packages/samba/4.1/rhel/6/src/sernet-samba-4.1.12-9.src.rpm

(Link of course requires a vaild account).

I will note that the Sernet folks have indicated they plan to release
EL7 packages, but that was several months back and nothing is available
yet.

In a pinch, you can often recompile packages from newer versions of
Fedora and in some cases they'll even just work without recompile
(I've installed the stock Samba RPM's from Fedora 20 into RHEL7 with
zero issues).


I'll give the source rpm a try and see what happens.

Can this package coesist with the current Samba package, or do I need to 
remove the CentOS Samba package first?


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Re: [CentOS] Samba 4.1.6

[Bowie Bailey]

On 10/17/2014 3:54 PM, Ray Van Dolson wrote:

On Fri, Oct 17, 2014 at 03:51:39PM -0400, Bowie Bailey wrote:

On 10/17/2014 3:32 PM, Ray Van Dolson wrote:

On Fri, Oct 17, 2014 at 01:22:46PM -0600, Frank Cox wrote:

On Fri, 17 Oct 2014 15:12:30 -0400
Bowie Bailey wrote:


That looked great until I got signed in and realized that they do not
yet have CentOS 7 packages...

I don't need this so I didn't register and so on, but I'm wondering
if they offer a source rpm package on that site that you might be
able to compile yourself?

They do.

https://download.sernet.de/packages/samba/4.1/rhel/6/src/sernet-samba-4.1.12-9.src.rpm

(Link of course requires a vaild account).

I will note that the Sernet folks have indicated they plan to release
EL7 packages, but that was several months back and nothing is available
yet.

In a pinch, you can often recompile packages from newer versions of
Fedora and in some cases they'll even just work without recompile
(I've installed the stock Samba RPM's from Fedora 20 into RHEL7 with
zero issues).

I'll give the source rpm a try and see what happens.

Can this package coesist with the current Samba package, or do I
need to remove the CentOS Samba package first?

I'm not 100% certain, but would suggest you remove (and maybe exclude)
the official RPM's from your system.


Actually, I think I just found a solution to the problem, so I may not 
need to worry about it.  For some reason, the user I'm trying to force 
with the force user command needs to be in the samba password database 
in order for it to work even though I'm using domain authentication 
otherwise.


Thanks for the help!

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Re: [CentOS] CentOS 7 docs, tutorials, etc...

[Bowie Bailey]

On 10/8/2014 12:50 PM, Valeri Galtsev wrote:

On Wed, October 8, 2014 11:18 am, Igal @ getRailo.org wrote:

On 10/8/2014 9:13 AM, Valeri Galtsev wrote:

Someone had mentioned on this list the following RedHat Enterprise 7
(and
as you know CentOS is binary replica of RedHat Enterprise with replaced
art work):

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/System_Administrators_Guide/part-Basic_System_Configuration.html

so if I buy RHEL 7 books everything should work as in the book?  part of
the problem for me is that there aren't many books about CentOS, and the
ones I found are a few years old

This covers CentOS 7 system administration sufficiently well for me (but
I
work with Linux and Unix for over 1.5 decades...).

So, if you decided to walk away from Windows, after you master Linux (or
maybe simultaneously with starting it), take a look at Unix successors
such as FreeBSD (most suitable for servers IMHO, some may recommend
OpenBSD for servers, my preference is FreeBSD), NetBSD (most rich with
what is ported to build and run on it), PC-BSD - based on FreeBSD, yet
made easiest to install workstation whith GUI interface (X11) support.

I understand, but this is primarily for servers for emails, web, etc.,
and it is my understanding that CentOS is one of the better
distributions for that kind of stuff.

I would say, CentOS 6 is the best of Linuxes suitable for server (IMHO).
However, I for one decided to move my servers away from Linux (as from
Unix-like Linux gradually becomes Windows-like during last 5 years or
so). Since some time ago I do not upgrade Linux systems on servers I
maintain. Instead, when the time comes, I just migrate server from Linux
to FreeBSD, which is much more suitable platform for server than Linux.
Version 7 of RedHat Enterprise or CentOS is much worse than version 6 to
build server on. Again, this is just my humble opinion. If I absolutely
have to build server on today's latest Linux, I will choose Debian, which
at least doesn't have systemd yet. But it will have it in next release...


What changes have you seen that affect using CentOS as a server? Sure, 
the GUI has changed over the years to be more like Windows, but most of 
my servers don't even have a GUI installed.  I have servers running 
CentOS 4, 5, 6, and 7.  The only differences I can think of between 4 
and 7 that affect server administration are selinux and systemd.  
Selinux can be easily disabled if you don't want to deal with it.  I 
don't like systemd at the moment, but that's at least partially due to 
only having worked with it for a couple of weeks so far.  The more I use 
it, the more I get used to it.  So far, it seems easy enough to use once 
you figure out the new commands and file locations.


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Re: [CentOS] CentOS 7 docs, tutorials, etc...

[Bowie Bailey]

On 10/8/2014 3:16 PM, Dave Stevens wrote:

Quoting Bowie Bailey bowie_bai...@buc.com:


On 10/8/2014 12:50 PM, Valeri Galtsev wrote:


I would say, CentOS 6 is the best of Linuxes suitable for server (IMHO).
However, I for one decided to move my servers away from Linux (as from
Unix-like Linux gradually becomes Windows-like during last 5 years or
so). Since some time ago I do not upgrade Linux systems on servers I
maintain. Instead, when the time comes, I just migrate server from Linux
to FreeBSD, which is much more suitable platform for server than Linux.
Version 7 of RedHat Enterprise or CentOS is much worse than version 6 to
build server on. Again, this is just my humble opinion. If I absolutely
have to build server on today's latest Linux, I will choose Debian, which
at least doesn't have systemd yet. But it will have it in next release...

What changes have you seen that affect using CentOS as a server?
Sure, the GUI has changed over the years to be more like Windows,
but most of my servers don't even have a GUI installed.  I have
servers running CentOS 4, 5, 6, and 7.  The only differences I can
think of between 4 and 7 that affect server administration are
selinux and systemd.  Selinux can be easily disabled if you don't
want to deal with it.  I don't like systemd at the moment, but
that's at least partially due to only having worked with it for a
couple of weeks so far.  The more I use it, the more I get used to
it.  So far, it seems easy enough to use once you figure out the new
commands and file locations.

And the RAID setup is MUCH easier and more rational, really nice to use.


Interesting.  I built my CentOS 7 server with a raid 1 mirror.  I found 
the raid setup in the installer to be confusing and very non-intuitive.  
I don't remember having any problems with it in previous versions.


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Re: [CentOS] C6 : AIDE experience

[Bowie Bailey]

On 9/9/2014 3:48 PM, Always Learning wrote:

Having problems with Tripwire on C6, I installed AIDE from the base
repository.  x86_64  0.14-3.el6_2.2  base   123 k


typing:
aide
result:
Couldn't open file /var/lib/aide/aide.db.gz for reading
(directory is empty and aide.db.gz does not exist.)
typing:
aide -i (for initialise the Aide database)
result:
AIDE, version 0.14
### AIDE database at /var/lib/aide/aide.db.new.gz initialized.
(size 10 bytes)
typing:
aide
result:
Couldn't open file /var/lib/aide/aide.db.gz for reading
typing:
aide --init  (for the second time)
result:
AIDE, version 0.14
### AIDE database at /var/lib/aide/aide.db.new.gz initialized.
(now 2,225,108 bytes)
typing:
aide
result:
Couldn't open file /var/lib/aide/aide.db.gz for reading
action:
renaming aide.db.new.gz as aide.db.gz
typing:
aide
result:
(noticeable delay)
AIDE, version 0.14
### All files match AIDE database. Looks okay!
(only 1 file in /var/lib/aide = aide.db.gz)
typing:
aide -u
result:
(noticeable delay)
AIDE, version 0.14
### All files match AIDE database. Looks okay!
### New AIDE database written to /var/lib/aide/aide.db.new.gz


Comment:
Looks like I have solved the riddle :-)
I did do a 'yum erase aide' followed by a 'yum install aide'
to ensure my first experience was not a technical malfunction.


I'm a bit behind on this list, but as I don't see any other replies, 
I'll comment here.


Aide does not update it's database file.  Whenever you run an init or 
update, it will create a new file.  You then have to manually rename 
that file in order to start using the new database.


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Re: [CentOS] good thin client PDF reader for centos 6.4

[Bowie Bailey]

On 6/20/2014 10:21 AM, m.r...@5-cent.us wrote:
 To you, and whoever else, you're very welcome. When my manager introduced
 me to it, my *instant* reaction was those state tax forms, but I know
 there's lots of other forms out there that the ignorant don't make
 fill-outable.

Do you have any suggestions for a good program to create PDF forms 
(linux or MS)?  I have a PDF document here that we have our customers 
fill out.  I looked into making it a form a while back, but I couldn't 
find any reasonable way to do it (there are a LOT of fields and 
check-boxes on this form).  All of the things I tried wanted to add 
visual elements to the form along with the fields and I don't have room 
on the form for that.  I just want to be able to say allow typing here, 
here, here, 

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Re: [CentOS] parsing out adjacent text

[Bowie Bailey]

On 6/3/2014 11:55 AM, Tim Dunphy wrote:
 Ok this is what I came up with:

 #!/bin/bash
 # this script parses mod_status to see which hosts are getting the most
 requests

 while true
 do
 echo Time and date: $(/bin/date +%D %H:%M:%S) 
 /tmp/apache_request_log  /tmp/apache_request_log
 echo “hostname: $(/bin/hostname -f)\n”/tmp/apache_request_log
 echo “host ip: $(/bin/hostname -i)”/tmp/apache_request_log
 echo Server Stats: $(/usr/bin/GET `hostname -f`/server-status/?auto |
 /bin/egrep  -i 'kbytes')  /tmp/apache_request_log
 echo Server Stats: $(/usr/bin/GET `hostname -f`/server-status/?auto |
 /bin/egrep  -i 'ReqPerSec')  /tmp/apache_request_log
 echo -e \n
 sleep 60
 done

 Still can't get the echo -e \n statement to print a new line for some
 reason. Other than that I'm good. And thanks for everyone's help!

'echo' on it's own should print a new line.  If you want two, why not 
just use two echo lines?

Also, you are piping everything else to the apache_request_log except 
for the last echo line.  Is the problem simply that you forgot to pipe 
that to the log file?

echo -e \n  /tmp/apache_request_log

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Re: [CentOS] new computers and monitors

[Bowie Bailey]

On 5/28/2014 3:00 PM, Michael Hennebry wrote:
 On Wed, 28 May 2014, Bowie Bailey wrote:

 On 5/28/2014 1:29 AM, Michael Hennebry wrote:
 On Tue, 27 May 2014, John R Pierce wrote:

 On 5/27/2014 5:38 PM, Michael Hennebry wrote:
 Until recently, I had a 32-bit machine with one monitor running fedora.
 The later editions of fedora didn't like it, so I switched to CentOS.
 Now I have two 64-bit machines and two monitors and a CenturyLink router.
 Also a KVM switch that I have not taken out of the package.
 My main machine has two video connections
 and two ethernet connections, eth0 and eth1 .
 My secondary machine sometimes runs Windows,
 so I'd like it not to have its own global IP address.
 My first thought would be to connect it directly
 to one of the ethernet ports on my main machine.

 How do I go about this?
 The answer I am expecting is one or more links to tutorials or the like.
 It can get fairly interesting depending on what you are trying to do.
 You may need a special crossover cable to connect the two computers
 directly.  The newer network cards may be able to handle doing this with
 a standard cable, but I haven't tried it.

 Why do you want to connect the two computers like this?  It is usually
 more trouble than it's worth unless you want to use the first computer
 as a firewall or something.  Just connect both of them to your router
 and everything should work fine.
 I don't know that I do.
 I've not done anything with a router since connecting
 my old computer to CenturyLink's router/modem.

 I want the second computer to not have its own global IP address.
 It will at least occasionally run Windows.
 I'd prefer not to assume that Windows will
 not try to fetch an IP address behind my back.

The router should have a built-in switch with multiple network jacks.  
Just plug the new computer into the router along with the old one and 
you should be fine.

Consumer grade Internet connections only give you a single global IP 
address, so anything connected to your router will use that same IP 
address globally.  The router will do NAT and DHCP for the internal 
machines to give them a local address.

(I am assuming that you have a standard modem/router combination that 
does NAT/DHCP.  As Les mentioned, if you have a simple modem that 
connects to your computer without the built-in router, things will be 
more complicated.)

Windows will fetch a local IP address (as will Linux) unless you specify 
one yourself and disable DHCP.  The Windows and Linux OS's on the same 
box may or may not automatically get the same local IP address depending 
on how the router handles it.  What is your concern about the IP address?

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Re: [CentOS] Centos backup tools

[Bowie Bailey]

On 5/16/2014 10:58 AM, Fred Smith wrote:
 Hi all!

 I'm building a raid box to use for backups, connectivity will be either
 USB3 or esata.

 Looking for suggestions on backup software I can use.

 I know there's rsync, which may be a good solution. I also find backupPC
 at epel, backintime also at epel, kbackup.

 DejaDup looks interesting, but none of the repos I'm set up to use
 shows it being available.

 some small details: I plan to use this to keep backups of my centos
 desktop, which has two 320GB drives in linux RAID-1. The backup box will
 have two 1TB drives, also in RAID-1. It will be a two drive enclosure
 with PS and cooling, with USB3 or esata, but not networking.

 I was thinking that it would be nice to have a full backup followed by
 a set of incrementals, and software that allows access to the state of
 the system for any specific date (similar to a source control system),
 but it may be that nothing free and/or uncomplicated will offer such
 a feature.

BackupPC works great.  I'm using it to back up about 20 servers. The 
pooling allows you to keep many more backups online than you expect.

A couple of things to watch for:

1) The data directory must be on a filesystem that supports hardlinks as 
that is how the pooling is done.

2) Due to the massive number of hardlinks used in the pool, it can be 
very difficult to backup or copy the backup server itself depending on 
the number of files in the pool.  If you want an offsite copy, I would 
suggest breaking the mirrored pair, sending one of those disks offsite, 
and then rebuilding to a new drive.  I actually have 3 drives in my 
raid1 setup so that there is still redundancy while it is rebuilding.

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Re: [CentOS] Some basic SELinux questions

[Bowie Bailey]

On 4/25/2014 4:27 PM, Stephen Harris wrote:
 On Fri, Apr 25, 2014 at 02:51:40PM -0400, m.r...@5-cent.us wrote:
 Stephen Harris wrote:
 a problem when CFe modifies a file that I don't want modified on my
 machine.
 Doesn't cfengine allow for logging changes on a per-system basis?
 I don't control the cfengine configuration, so I don't get to determine
 the logs, which is why I want to be alerted if it changes one of my
 files :-)

Aide would seem to be what you are looking for.  It tracks hashes, 
timestamps, permissions, etc of the files on your system and notifies 
you when something changes.

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Re: [CentOS] I want to ask about some Kernel level operations.

[Bowie Bailey]

On 1/1/2014 6:53 PM, Eliezer Croitoru wrote:
 I want to make sure that while compiling as root nothing will break down
 inside the machine.

 I want to compile software on a Xeon SERVER.
 The basic issue is that there is a recommendation to not compile it as a
 root user.

 I have compiled software as a root user more then once and I am not sure
 why would there is a need to run it as non-root user?

 I have taken a look at the /proc/ FS but I do not see anything that can
 harm anything yet.

   From my aspect it's just background of electricity noise.

 I will be happy to hear from experience of others about it.

The basic issue is limiting your exposure in the case of a problem. As 
long as everything works and is programmed properly, you can do whatever 
you want as root.  But as soon as there is a problem, there can be huge 
consequences.

The root user has access to everything on the server.  So a typo in a 
program/makefile/command has the possibility of bringing down the whole 
server.  On the other hand, if you are logged in as a normal user, then 
the damage is limited to your directories.

Best practices say that you should do everything possible as a normal 
user.  Root should only be used when you must have access to something 
that the normal user doesn't.  Some distributions (like Ubuntu) even 
enforce this by not allowing root logins and forcing the user to use 
sudo for commands that require root access.

Bottom line is this:  It's your server, so use root if you want. Just be 
aware of the dangers and don't try to blame anyone other than yourself 
when a typo or misbehaving build script takes down the system.

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Re: [CentOS] I want to ask about some Kernel level operations.

[Bowie Bailey]

On 2/4/2014 2:57 PM, John R Pierce wrote:
 On 2/4/2014 9:15 AM, Bowie Bailey wrote:
 On 1/1/2014 6:53 PM, Eliezer Croitoru wrote:
 I want to make sure that while compiling as root nothing will break down
 inside the machine.
 The basic issue is limiting your exposure in the case of a problem.
 this is a month old thread, that was hammered into the ground, with the
 OP arguing with each answer he was given.

I am a bit behind on this list.  I read through the thread, but didn't 
notice the dates.

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Re: [CentOS] Outbound traffic spike every 30 minutes

[Bowie Bailey]

On 12/4/2013 4:47 AM, Heiko Specht wrote:
 hi,
 i aggree with mark.
 maybe iftop -P would work for you...
 and if you can determine a port from iftop you could run lsof -Pn | grep 
 :Port to list the daemon which uses this port.

 that is what i would try..

 Heiko

 m.r...@5-cent.us 03.12.2013 23:15 
 Bowie Bailey wrote:
 On 12/3/2013 4:49 PM, m.r...@5-cent.us wrote:
 Bowie Bailey wrote:
 Since Sunday morning, one of my CentOS servers has been generating a
 small spike of outbound traffic every 30 minutes (X:00 and X:30). It's
 not enough traffic to really cause any notice except for the fact that
 it is a very regular pattern and it started abruptly at midnight
 Sunday.

 This server is used for mail (Courier-MTA), and DNS (Bind).  I cannot
 find anything unusual in either of those logs.  I tried grepping
 through my firewall logs, but have been unable to find anything useful
 there
 either.  I don't see any cron jobs that would generate network traffic.

 Any suggestions how I can go about tracking this down?
 Run rkhunter?

 Actually, if it's that regular, you could run tcpdump when you expect
 it.
 rkhunter complained about a few files, but rpm --verify doesn't flag
 any of them.  Other than that, just a few insecure settings and out of
 date programs, which are not ideal, but do not indicate a problem on
 their own.

 I could try running tcpdump or wireshark, but that's going to generate a
 lot of data and I'm not sure how to go about filtering it.  I know the
 spike happens on the hour and half hour, but my traffic monitor does not
 give me enough detail to see exactly when it starts or exactly how long
 it lasts and I don't know what protocol or port I'm looking for.

 Dumb idea: run top and see if something spikes.

iftop helped me track it down.  It was actually starting at :05 and 
:25.  One of my email clients received a 20M email and was having 
problems downloading it.  Every 30 minutes, the pop client would 
connect, try to download the emails, and then disconnect after 2 minutes.

Thanks for the suggestions everyone!

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[CentOS] Outbound traffic spike every 30 minutes

[Bowie Bailey]

Since Sunday morning, one of my CentOS servers has been generating a 
small spike of outbound traffic every 30 minutes (X:00 and X:30). It's 
not enough traffic to really cause any notice except for the fact that 
it is a very regular pattern and it started abruptly at midnight Sunday.

This server is used for mail (Courier-MTA), and DNS (Bind).  I cannot 
find anything unusual in either of those logs.  I tried grepping through 
my firewall logs, but have been unable to find anything useful there 
either.  I don't see any cron jobs that would generate network traffic.

Any suggestions how I can go about tracking this down?

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Re: [CentOS] Outbound traffic spike every 30 minutes

[Bowie Bailey]

On 12/3/2013 3:42 PM, dieg...@gmail.com wrote:
  
   --Mensaje original-- De: Bowie Bailey Remitente:
   centos-boun...@centos.org Para: CentOS mailing list Responder a:
   CentOS mailing list Asunto: [CentOS] Outbound traffic spike every 30
   minutes Enviado: 3 de dic de 2013 19:36
  
   Since Sunday morning, one of my CentOS servers has been generating a
small spike of outbound traffic every 30 minutes (X:00 and X:30).
   It's not enough traffic to really cause any notice except for the
   fact that it is a very regular pattern and it started abruptly at
   midnight Sunday.
  
   This server is used for mail (Courier-MTA), and DNS (Bind).  I cannot
find anything unusual in either of those logs.  I tried grepping
   through my firewall logs, but have been unable to find anything
   useful there either.  I don't see any cron jobs that would generate
   network traffic.
  
   Any suggestions how I can go about tracking this down?
  
 
  Is inbound or outbound?
  What port?
  tcp or udp?

It is outbound from my server to the Internet.  My traffic monitor does 
not give me any more detailed information, just a nice sawtooth graph 
showing the regular spikes.

TCP or UDP and the port is part of what I am trying to determine.

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Re: [CentOS] Outbound traffic spike every 30 minutes

[Bowie Bailey]

On 12/3/2013 4:49 PM, m.r...@5-cent.us wrote:
 Bowie Bailey wrote:
 Since Sunday morning, one of my CentOS servers has been generating a
 small spike of outbound traffic every 30 minutes (X:00 and X:30). It's
 not enough traffic to really cause any notice except for the fact that
 it is a very regular pattern and it started abruptly at midnight Sunday.

 This server is used for mail (Courier-MTA), and DNS (Bind).  I cannot
 find anything unusual in either of those logs.  I tried grepping through
 my firewall logs, but have been unable to find anything useful there
 either.  I don't see any cron jobs that would generate network traffic.

 Any suggestions how I can go about tracking this down?
 Run rkhunter?

 Actually, if it's that regular, you could run tcpdump when you expect it.

rkhunter complained about a few files, but rpm --verify doesn't flag 
any of them.  Other than that, just a few insecure settings and out of 
date programs, which are not ideal, but do not indicate a problem on 
their own.

I could try running tcpdump or wireshark, but that's going to generate a 
lot of data and I'm not sure how to go about filtering it.  I know the 
spike happens on the hour and half hour, but my traffic monitor does not 
give me enough detail to see exactly when it starts or exactly how long 
it lasts and I don't know what protocol or port I'm looking for.

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Re: [CentOS] Size limitations in .htaccess

[Bowie Bailey]

On 5/29/2013 10:08 PM, Max Pyziur wrote:
 On Wed, 29 May 2013, m.r...@5-cent.us wrote:


 Have you considered running fail2ban, and banning them using iptables?
 I've considered that.

 But I'm tied to my (little?/not-so-little?) home-grown system of mining
 threatening IPs from BL sites (spam, sshd, forumspam), running them
 through an sql database, and outputing /etc/hosts.deny files to block via tcp
 wrappers, and now starting to output Deny from lines to place in
 .htaccess files. Deny From lines longer than somewhere around 8000
 characters seem to be the limit; I was curious if there was a specified
 limit somewhere, and whether or not I could put multiple Deny From lines?

 WHile fail2ban looks good, the little that I've tried it, I like keeping
 the firewall iptables neat, and doing the blocking as I have described
 above (maybe it's familiarity trumping fail2ban; maybe it's that fail2ban
 has a bit of a learning curve ...)

Fail2ban keeps all of its rules in it's own chain, so any custom rules 
that you have created will not get lost in the clutter.

You could also do the blocking yourself with iptables rather than having 
fail2ban manage it for you.  Just create iptables rules rather than the 
hosts.deny format.

iptables -I Blacklist -s xxx.xxx.xxx.xxx -j DROP

Of course, you need to add a rule in your main ruleset to call the 
Blacklist chain.  And make sure to save the rules from time to time so 
you don't lose all of them in a reboot.

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Re: [CentOS] New motherboard - kernel panic

[Bowie Bailey]

On 4/15/2013 5:09 PM, m.r...@5-cent.us wrote:
 Bowie Bailey wrote:
 On 4/15/2013 1:35 PM, m.r...@5-cent.us wrote:
 Bowie Bailey wrote:
 On 4/12/2013 5:33 PM, Bowie Bailey wrote:
 I had to replace the motherboard on one of my CentOS 4 systems and am
 now getting a kernel panic.

 When I try to boot up, I get this:

   Volume group VolGroup00 not found
 ERROR: /bin/lvm exited abnormally! (pid 448)
 mount: error 6 mounting ext3
 mount: error 2 mounting none
 switchroot: mount failed: 22
 umount /initrd/dev failed: 2
 Kernel panic - not syncing: Attempted to kill init!

 (I apologize for any typos, I don't have a way to copy/paste from that
 screen)

 I can boot up with the boot CD, go into rescue mode and browse the
 files, so I know the drives are ok.

 I found some stuff online saying that I should recreate my initrd from
 rescue mode if the motherboard changed.  I tried this, but am still
 getting the same results.
 Sorry, hit send and had another thought: I think you said you rebuilt
 the initrd... *could* you see the drives? *Did* the running system you
 rebuilt from have all the LVM drivers loaded when you rebuilt it?
 I can see the drives from the rescue environment.  I don't know how to
 check the LVM drivers.
 You need *both* the md drivers and lvm drivers. I haven't built a system
 using lvm in years, I'm afraid, but it shouldn't be too hard.

 Btw, this may be of some interest:
 http://www.centos.org/docs/5/html/Cluster_Logical_Volume_Manager/device_mapper.html

I got it figured out.  The problem was at the sata driver level. The 
instructions I found for rebuilding the initrd neglected to mention that 
I needed to edit modprobe.conf and add the appropriate driver 
information first.

I'm still not sure why it was able to get as far as loading the kernel 
before suddenly being unable to see the drives.  If it needs sata 
drivers to see the disks, why doesn't it need them to read the boot 
partition?  I didn't have to mess with grub or the boot sector after 
changing motherboards.

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Re: [CentOS] New motherboard - kernel panic

[Bowie Bailey]

On 4/12/2013 6:53 PM, John R Pierce wrote:
 On 4/12/2013 2:33 PM, Bowie Bailey wrote:
 I had to replace the motherboard on one of my CentOS 4 systems and am
 now getting a kernel panic.
 what chipset and storage controller was the old board?   what chipset
 and storage controller is on the new one?

The old board was an ASUS A8N-VM CSM with the NVIDIA nForce 430 chipset.

The new board is an ASRock A785GM-LE board with the AMD SB710 chipset.

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Re: [CentOS] New motherboard - kernel panic

[Bowie Bailey]

On 4/12/2013 5:33 PM, Bowie Bailey wrote:
 I had to replace the motherboard on one of my CentOS 4 systems and am
 now getting a kernel panic.

 When I try to boot up, I get this:

 Volume group VolGroup00 not found
   ERROR: /bin/lvm exited abnormally! (pid 448)
   mount: error 6 mounting ext3
   mount: error 2 mounting none
   switchroot: mount failed: 22
   umount /initrd/dev failed: 2
   Kernel panic - not syncing: Attempted to kill init!

 (I apologize for any typos, I don't have a way to copy/paste from that
 screen)

 I can boot up with the boot CD, go into rescue mode and browse the
 files, so I know the drives are ok.

 I found some stuff online saying that I should recreate my initrd from
 rescue mode if the motherboard changed.  I tried this, but am still
 getting the same results.

Anyone have any ideas here?  I can rebuild the machine if I have to, but 
that's a last resort.

The old board was an ASUS A8N-VM CSM with the NVIDIA nForce 430 chipset.

The new board is an ASRock A785GM-LE board with the AMD SB710 chipset.

Thanks,

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Re: [CentOS] New motherboard - kernel panic

[Bowie Bailey]

On 4/15/2013 1:33 PM, m.r...@5-cent.us wrote:
 Bowie Bailey wrote:
 On 4/12/2013 5:33 PM, Bowie Bailey wrote:
 I had to replace the motherboard on one of my CentOS 4 systems and am
 now getting a kernel panic.

 When I try to boot up, I get this:

  Volume group VolGroup00 not found
ERROR: /bin/lvm exited abnormally! (pid 448)
mount: error 6 mounting ext3
mount: error 2 mounting none
switchroot: mount failed: 22
umount /initrd/dev failed: 2
Kernel panic - not syncing: Attempted to kill init!

 (I apologize for any typos, I don't have a way to copy/paste from that
 screen)

 I can boot up with the boot CD, go into rescue mode and browse the
 files, so I know the drives are ok.

 I found some stuff online saying that I should recreate my initrd from
 rescue mode if the motherboard changed.  I tried this, but am still
 getting the same results.
 Anyone have any ideas here?  I can rebuild the machine if I have to, but
 that's a last resort.
 Just sort of guessing - could the new m/b have resulted in a new UUID, and
 the configuration - fstab? hwconf? - is looking for the old?

The drives are in an md array (raid 1) which is used as the PV for the 
volume group that is producing the error.  fstab simply references the 
logical volume.  LVM configuration refers to /dev/md1.  mdadm.conf 
simply says device partitions.  I can't go any farther than that 
without a running system.

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Re: [CentOS] New motherboard - kernel panic

[Bowie Bailey]

On 4/15/2013 1:35 PM, m.r...@5-cent.us wrote:
 Bowie Bailey wrote:
 On 4/12/2013 5:33 PM, Bowie Bailey wrote:
 I had to replace the motherboard on one of my CentOS 4 systems and am
 now getting a kernel panic.

 When I try to boot up, I get this:

  Volume group VolGroup00 not found
ERROR: /bin/lvm exited abnormally! (pid 448)
mount: error 6 mounting ext3
mount: error 2 mounting none
switchroot: mount failed: 22
umount /initrd/dev failed: 2
Kernel panic - not syncing: Attempted to kill init!

 (I apologize for any typos, I don't have a way to copy/paste from that
 screen)

 I can boot up with the boot CD, go into rescue mode and browse the
 files, so I know the drives are ok.

 I found some stuff online saying that I should recreate my initrd from
 rescue mode if the motherboard changed.  I tried this, but am still
 getting the same results.
 Anyone have any ideas here?  I can rebuild the machine if I have to, but
 that's a last resort.
 Sorry, hit send and had another thought: I think you said you rebuilt
 the initrd... *could* you see the drives? *Did* the running system you
 rebuilt from have all the LVM drivers loaded when you rebuilt it?

I can see the drives from the rescue environment.  I don't know how to 
check the LVM drivers.

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Re: [CentOS] New motherboard - kernel panic

[Bowie Bailey]

On 4/15/2013 1:44 PM, Les Mikesell wrote:
 On Mon, Apr 15, 2013 at 12:35 PM,  m.r...@5-cent.us wrote:

 I had to replace the motherboard on one of my CentOS 4 systems and am
 now getting a kernel panic.
 CentOS 4 - seriously???

Yea, it's an old system.


 I can boot up with the boot CD, go into rescue mode and browse the
 files, so I know the drives are ok.

 I found some stuff online saying that I should recreate my initrd from
 rescue mode if the motherboard changed.  I tried this, but am still
 getting the same results.
 Anyone have any ideas here?  I can rebuild the machine if I have to, but
 that's a last resort.
 Sorry, hit send and had another thought: I think you said you rebuilt
 the initrd... *could* you see the drives? *Did* the running system you
 rebuilt from have all the LVM drivers loaded when you rebuilt it?
 You need to include whatever drivers loaded in rescue mode in the new
 initrd, but I've forgotten the exact details.  In Centos5 you would
 add alias entries to /etc/modprobe.conf but it might have been named
 something else in C4.   Maybe you can see what is there before you
 chroot to the installed instance and change the file there to match,
 then make the new initrd.   Once in a similar circumstance I just
 copied the whole contents of ./boot from a different machine with
 identical hardware so I didn't have to know as much as anaconda about
 matching hardware and drivers.

There is a /etc/modprobe.conf file on the original system.  Among other 
things, it says:

alias scsi_hostadapter sata_nv

I assume that refers to the driver for the nvidia chipset.

I found a modprobe.conf file in the rescue environment living in 
/tmp/modprobe.conf.  This one says:

alias scsi_hostadapter ahci

I guess that's a driver that works with the new hardware?  I do not have 
the ports in ahci mode in the bios.

What do I need to do to make sure the driver gets into initrd?  Or do I 
just need to make the change to /etc/modprobe.conf on the hard drive?

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Re: [CentOS] New motherboard - kernel panic

[Bowie Bailey]

On 4/15/2013 3:10 PM, Les Mikesell wrote:
 On Mon, Apr 15, 2013 at 1:54 PM, Bowie Bailey bowie_bai...@buc.com wrote:
 CentOS 4 - seriously???
 Yea, it's an old system.
 If you have somewhere to copy the data,  the best approach would be to
 back it up from the rescue-mode boot, reinstall centos 6 and copy back
 anything you need - and be good for another many years.

This system is running BackupPC.  The number of hardlinks in the data 
makes copying impractical.  I may rebuild it with CentOS 6 later and let 
the backups rebuild themselves, but I don't want to do it now if I can 
avoid it.


 There is a /etc/modprobe.conf file on the original system.  Among other
 things, it says:

 alias scsi_hostadapter sata_nv

 I assume that refers to the driver for the nvidia chipset.

 I found a modprobe.conf file in the rescue environment living in
 /tmp/modprobe.conf.  This one says:

 alias scsi_hostadapter ahci

 I guess that's a driver that works with the new hardware?  I do not have
 the ports in ahci mode in the bios.
 lsmod from the running rescue system should show the loaded modules.
 Your initrd has to include anything needed to access the hard drive
 and filesystem before you can find the others.

 What do I need to do to make sure the driver gets into initrd?  Or do I
 just need to make the change to /etc/modprobe.conf on the hard drive?
 I think you would change the /etc/modprobe.conf on the hard drive and
 chroot there (/mnt/sysimage) before running mkinitrd.

I figured that one out just before I received your response.  That fixed 
the bootup problem.  The changes to modprobe.conf were what was missing 
from the instructions I found online on Friday.

For future reference, this is what I did:

1) Boot into rescue mode.
2) Look at /tmp/modprobe.conf in the rescue environment to see what 
driver was in use.
3) Edit /mnt/sysimage/etc/modprobe.conf and add the driver there
4) chroot /mnt/sysimage
5) cd /boot
6) mv initrd-(kernel version).img initrd-(kernel version).img.bkup
7) mkinitrd initrd-(kernel version).img (kernel version)
8) reboot

Now I've just got to work on getting the network card going, but that (I 
hope!) should be much easier now that the system is booting.

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Re: [CentOS] OT: memory brands?

[Bowie Bailey]

On 2/20/2013 3:43 PM, John R Pierce wrote:
 On 2/20/2013 6:38 AM, Patrick Lists wrote:
 On 02/20/2013 02:57 PM,m.r...@5-cent.us  wrote:
 So, I'm rebuilding my system at home. Any recommendations or warnings
 about brands of memory? Googling around, I see brands I've never*heard*
 of
 I like Crucial.
 I used to use Crucial.Then I had a bunch of hard-to-diagnose issues
 with different systems that finally tracked down to various 'high end'
 Crucial Ballistix memories.   Switched to Corsair for desktop stuff,
 haven't had any problems. Most of my servers have either OEM brand
 (HP, Dell, IBM) memory (often it turns out to be Hyundai or Samsung), or
 Kingston.

I've been lucky enough to not have many issues with memory.  Most of the 
failures I deal with are hard drives, power supplies, and motherboards.

I have used Corsair, Kingston, G.Skill and OCZ memory.

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Re: [CentOS] OT: UPS battery vendor

[Bowie Bailey]

On 2/11/2013 2:57 PM, m.r...@5-cent.us wrote:
 Hi, folks.

 I need some new replacement batteries for rack-mount APC UPSes. My old
 vender... well, the salesman I dealt with for several years left about a
 year and a half ago, and last year's purchase was a disaster (wrong
 batteries, wrong batteries, months to get the shipping to return the wrong
 batteries...), so I'm looking for a new, reliable vendor who does US
 government contract sales.

 Recommendations? Warnings?

I don't know if they do government sales, but I've done business with 
Batteries Plus locally and BatterySharks.com via the Internet.

Batteries Plus was reliable, but their prices were going up, so I had to 
look for a less expensive solution.

On the first order I placed with Battery Sharks in 2011, they sent me 
7Ah batteries instead of 7.5Ah.  Not a huge deal, but not what I 
ordered.  After complaining about it, they gave me a $15 account credit 
(I used the batteries anyway) and I haven't had any problems since.  
Even with shipping, they are less expensive than Batteries Plus.

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Re: [CentOS] OT: UPS battery vendor

[Bowie Bailey]

On 2/11/2013 3:37 PM, John R Pierce wrote:
 On 2/11/2013 12:13 PM, Bowie Bailey wrote:
 Batteries Plus was reliable, but their prices were going up, so I had to
 look for a less expensive solution.
 lead acid battery prices have gone up a lot due to the price of lead and
 transportation.

True, but here is a comparison:

12V 18Ah battery
Batteries Plus: $79.88
Battery Sharks: $38.27

12V 7.5Ah battery
Batteries Plus: $42.47
Battery Sharks: $20.10

This is the total shipped price of a single battery based on ordering a 
set of batteries -- (2) 7.5Ah batteries or (4) 18Ah batteries.  The 
price would probably drop a bit on both sides if ordering in quantity.

Batteries Plus used to give us a discount on all of our orders since we 
were a regular customer, but they still weren't even close to Battery 
Sharks' prices.

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Re: [CentOS] load balancer recommendations

[Bowie Bailey]

On 1/20/2013 10:12 AM, Nikolaos Milas wrote:

 You'll undoubtedly find more material on the iNet, but I hope the above
 may serve as a starting point.

The iNet?  Wow, Apple's getting into everything these days...  :)

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Re: [CentOS] load balancer recommendations

[Bowie Bailey]

On 1/23/2013 10:57 AM, m.r...@5-cent.us wrote:
 Bowie Bailey wrote:
 On 1/20/2013 10:12 AM, Nikolaos Milas wrote:
 You'll undoubtedly find more material on the iNet, but I hope the above
 may serve as a starting point.
 The iNet?  Wow, Apple's getting into everything these days...  :)
 I think he meant the Inet. g

 Missed the beginning of this thread, but if this is about serious hardware
 load balancers, a few years ago, where I was working, we bought one from
 Radware - less expensive than F5, and a very nice box, very configurable.

 ObBias: as I worked closely with the sales engineer setting it up, and got
 friendly with him, I'd be glad to get you in touch with him

We're using a Foundry ServerIron.  Works well for us.

But the OP was asking about a software load balancer.

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Re: [CentOS] courier mail for Centos

[Bowie Bailey]

On 12/6/2012 8:42 AM, Robert Moskowitz wrote:
 Are there existing rpms for courier mta?

 I am working from:

 http://www.howtoforge.com/virtual-users-and-domains-with-postfix-courier-mysql-and-squirrelmail-fedora-14-x86_64

 And am making progress with postfix and mysql, but looking ahead to
 other steps.  I see squirrelmail is in EPEL.

I don't know of any rpms in the major repos.  However, the courier and 
courier-auth tarballs have spec files that make it VERY easy to build 
the rpms yourself.  You don't even have to unpack the tarballs.

Ask on the courier mailing list.  Very friendly and the developer is 
active on the list.

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