this is a production server, so running an extended memtest not going to
happen. But I can swap it out and put it in a backup system to do the test.
It's beginning to look a lot like a RAM issue as I have now seen a couple
segfaults from programs that have always run fine. Every kernel panic
Isn't the switch accessible via a Web interface? Most are. If so, why not use a
browser to access it? It is much more practical nowadays.
Of course, I don't know your concrete case, I am thinking generally.
No virus found in this outgoing message.
Checked by AVG.
Version: 8.0.100 / Virus
Yes, it was accessible via the web, until I changed the IP - but
forgot to change the subnet mask as well. (...)
Can you configure some computer with a manual IP address and subnet mask
to fit those the switch has now? You would then be able to change its setup.
No virus found in this outgoing
Let me be the first (maybe):
CentOS 5.2 is here (at least):
http://mirror.chpc.utah.edu/pub/centos/5.2/
Thank you all who worked on it!
No virus found in this outgoing message.
Checked by AVG.
Version: 8.0.100 / Virus Database: 270.4.1/1513 - Release Date: 22-06-2008 7:52
I get kernel panic at powernowk8_init+0x05e/0x1c3.
I don't have the necessary knowledge to evaluate kernel related issues,
but it seems to me that there's some kind of confusion involved here.
People are reporting problems with Intel Pentium II and III machines yet
PowerNow is a speed
Are there any KVM over IP switches that are not thousands of dollars?
Ideally a 3-4 port switch for a few hundred seems reasonable to me.
Try this 8-port one from LevelOne:
http://global.level1.com/Business-Products/KVM-Switches---Extenders/Rackmount-KVM-Switches/KVM-0831/421.html
It has an
Which is about $400, not counting cables, which are expensive.
Well, you said not thousands of dollars... And I bought the cables for
about 20 dollars each.
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That part isn't a function of the iPEPS, it's a function of your
KVM switch. So yes, I was thinking about models that do it with
a particular key stroke. I've used the D-Link DKVM-8E as a decent
low cost unit, although it has the tendancy to get confused during
a full power outage of your
Ok, I won't argue with that; a it fails in this scenario overrides
a it works for me. I will add though, that were it got into the state
described above was where I was able to recover it by using the reset
button. You might want to try that next time instead of the cable
disconnect
ata1: port is slow to respond, this delay is known to occur on vacant
SATA ports
ata1: port failed to respond (30 secs)
ata1: SRST failed (status 0xFF)
ata1: SRST failed (err_mask=0x100)
ata1: softreset failed, retrying in 5 secs
ata1: SRST failed (status 0xFF)
ata1: SRST failed (err_mask=0x100)
Hello all
I am running CentOS 5 on a small server and I am having very strange memory
malfunctions.
The computer runs perfectly with no problems whatsoever. From time to time,
after a soft reboot, the computer emmits beeps corresponding to a memory fault.
It never reboots again until I find
Anyone have an update tutorial/howto for samba to authenticate to ldap?
http://www.samba.org/samba/docs/man/Samba-Guide/happy.html
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I want to build a dedicated firewall/router as I am launching a NPO and I can
host this in my garage. (Comcast offered me a 100 x 20 circuit for $99/mo
with 5 statics)
Thoughts, opinions, suggestions are welcome as to what to do!
http://www.pfsense.org/
Now the machine is not particularly powerful: it is 64-bit machine, dual
core CPU, 3 GB RAM. So perhaps this is a factor in why I am having the
following problem: once in awhile that XFS partition starts generating
multiple I/O errors, files that had content become 0 byte, directories
Correction to the above: the XFS partition is 26TB, not 16 TB (not that it
should matter in the context of this particular situation).
Yes, it does matter:
Read this:
*[CentOS] 32-bit kernel+XFS+16.xTB filesystem = potential disaster*
uname -a
Linux nrims-bs 2.6.18-274.12.1.el5xen #1 SMP Tue Nov 29 14:18:21 EST
2011 x86_64 x86_64 x86_64 GNU/Linux
this is clearly a 64-bit OS so the 32-bit limitations ought not to apply.
Ok! Since you didn't inform us in your initial post, I thought I should
ask you in order to
Nevertheless, it seems to me that you should have more than 3GB of RAM
on a 64 bit system...
Since the width of the binary word is 64 bit in this case, 3GB
correspond to 1.5GB on a 32 bit system...
If you have a 64 bit system you should give it space to work properly.
Nevertheless, it seems to me that you should have more than 3GB of RAM
on a 64 bit system...
Since the width of the binary word is 64 bit in this case, 3GB
correspond to 1.5GB on a 32 bit system...
If you have a 64 bit system you should give it space to work properly.
... and the fact that
You are right - it would indeed be desirable to have more than 3 GB of
RAM on that system. However it is not obvious to me that having that
little RAM should cause I/O failure? Why? That it would make the
machine slow is to be expected - and especially so given that I had to
jack the
Why does it have to be CentOS? If you want a wonderful router/firewall
that you can have up and running in a few minutes, you should look at this:
www.pfsense.org
I quote from their website:
pfSense is a free, open source customized distribution of FreeBSD
http://www.freebsd.org tailored for
For a newbie one like me ... which option you would advise me to go for?
I do not have any special preferences but I do care for the one that
is more stable and provide really more security.
It seems to me that the last line of my previous post already contained
my answer to your question
pfsense for a newbie?
Yup! Based on the simple requirements that the OP expressed, i.e. a
firewall for the whole network in my place, I would again recommend
pfsense. It may seem paradoxical but it's not. It just *works* after a
very simple and quick installation. The user only has to answer
pfsense for a newbie?
A CentOS-like firewall would be ClearOS (formerly Clarkconnect) and again
would reduce the number of simultaneously-learned layers to wade through.
While it works very well, it is yet another layer and difference to learn,
and when learning is is really good to not
A few months ago I had an enormous amount of grief trying to understand
why a RAID array in a new server kept getting corrupted and suddenly
changing configuration. After a lot of despair and head scratching it
turned out to be the SATA cables. This was a rack server from Asus with
a SATA
the problem with that is when your boot drive dies your can't boot...with
ubuntu at least if any drive dies i can stilll boot off of the other 3..:)
You don't need a boot drive, you only need a *boot partition*.
So, you create a small *boot partition* with RAID1 and then allocate the
rest of
i then have to redo my entire array...and loose space inside the
array. Plus if i raid1 it then i only have two bootable disks..at
least this way i have 4 bootable disks..:)
Lose space? 100 or 200MB? Why the heck wouldn't you be able to spare 100
or 200MB of the gigantic size of today's
Plus if i raid1 it then i only have two bootable disks..at least
this way i have 4 bootable disks..:)
No, you don't have 4. Please study the way a RAID10 array works.
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Do a google search for pfe.exe (Programmers File Editor). Its a freeware
windoz text editor that handles linux / Unix or dos / windows end of line
characters with out any problems. If you can't find it e mail me off list and
I can attach it to my reply, its only a 2/3mb file.
Regards John
I may need a strong shot of coffee but I though
putting hide files = /~*/ as follows in the
samba config file would hide files with a tilde.
[homes]
comment = Home Directories
browseable = no
writable = yes
hide files = /~*/
Unfortunately after restarting the server the files
It's a real raid adapter and the linux kernel is able to handle it
with the standard ips module
I found some references in Google that seemed to indicate a fakeraid
controller, one that depends on the driver to do the RAID calculations...
It's always up to you to decide but i'd prefer
I've installed RHEL 4 on several IBM eSeries servers with ServeRaid
controllers and I despise them. They fail too often and often don't
tell you that they are having problems until it is too late. My
suggestion is to use Linux software for your RAID array, and bypass the
ServeRaid controller
I've installed RHEL 4 on several IBM eSeries servers with ServeRaid
controllers and I despise them. They fail too often and often don't
tell you that they are having problems until it is too late.
Are you referring to the SATA controllers or to the SCSI ones?
US Robotics produces a USB modem that they present as compatible with
Linux. It even has a sticker on the box stating that.
The product's page is here:
http://www.usr.com/products/modem/modem-product.asp?type=featuressku=USR5637
Linux Format magazine has a review of this modem on their
Well, you never mentioned broadband or wireless... Your original post
only referred to USB or PCI dialup modems.
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In Europe at least, the Huawei modems provided by Vodafone work with
Linux out of the box. Someone I know bought a Asus EeePC with Linux and
the modem just worked on the first attempt. It seems that Vodafone is
actively supporting Linux.
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I hope someone familiar with the way Linux processes files can enlighten
me on the following:
I recently replaced an old Windows 2000 server with a new machine
running CentOS 5.2. It uses Samba 3.2.7 to serve a network of Windows XP
clients.
We are a newspaper. We use Acrobat Distiller to
http://www.linuxforums.org/forum/linux-newbie/111044-change-order-files-directory.htm
I searched Google too, and I read that page. That doesn't work for us:
the Windows users won't touch anything on the server (or Linux, for that
matter) and I am not there every day. The file names change
The Windows users wouldn't have to know that they are touching anything on
the server. If that script will in fact work and getting it to run at the
appropriate time is the only problem, then set up something from the Windows
box
to trigger it on your server. Click the pretty icon right
If you are processing on the linux side and not via samba, and
your program will take a list of files on the command line instead of
groveling through the directory itself, you might simply start it with a
wild-card filename on the command line. The shell will sort the list as
it
If the linux FS is efs2, maybe the dir_index option of mke2fs will doo
what you want? See man mke2fs. It says it uses hashed b-trees, but for
speed.
That is the kind of information I am looking for. Thank you!
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You might want to look closely at the file names in Linux.
Windows is not case sensitive but Linux is.
In Windows, you cannot create the 2 files, TEST.DOC and test.doc in the
same directory but in Linux you can. It may be that some of these files
are stored differently as in file1.ps and
Well, you must concede that it is *somewhat* ridiculous to read a
one-line innocent email containing a twelve-line dense disclaimer...
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Real World Benchmarks Of The EXT4 File-System
http://www.phoronix.com/scan.php?page=articleitem=ext4_benchmarksnum=1
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I just verified the filesystem features with tune2fs -l and the
dir_index feature is already present. So, no luck here.
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http://code.google.com/p/samba-dirsort-vfs/
Did you try that? I think someone recommended it to you.
Well, I did try to compile it but make fails on all the Linux computers
I have access to. They all run CentOS 5.2. It would be nice to have a
.rpm... I am a sysadmin, not a programmer, I am
This sounds to me like the dir_index option was applied to a file system
that didn't originally have it and an fsck -Df wasn't run at the time.
That may well be the most relevant information given here! I will
*certainly* give it a try.
Thank you!
I still think the dir_index _ought_ to do what you need it to do. But
I've never had to depend on it for that purpose so it is just wishful
supposition on my part.
I am now almost certain that dir_index will solve the problem. I already
remotely did fsck -fD to that filesystem.
Now I
Did you consider sharing a directory from the machine running distiller
and cifs-mounting it on the linux side to get ntfs behavior?
That is out of question. The Windows machines are graphic workstations
which are not all connected all the time and the Distiller service is
essential to the
I was under the impression that the Distiller app was running under
Windows. If it isn't, it doesn't make much sense for it to expect NTFS
filesystem semantics.
Yes, Distiller is running under Windows. When pages start to get ready,
one of the graphic operators opens Distiller on
I based my speculation on some observations I had made on some of my
own systems when I implemented dir_index. It so happens that, on that
system at least, a find /foo -print returns the filenames in sorted
order. Unfortunately, it isn't true on another system that I just
checked. So
Hi,
You might want to try to look into the Distiller side of things.
That's what I always did. I am a DTP guy.
1) I believe you are using Rundirex.txt file to convert all the .ps's
into one .pdf. This page from Adobe confirms that it will take the
files in directory order under
again, Windows NTFS directories are inherently stored in sorted order
because they are B-Tree indexes on the filename.
if this distiller process is being run from a DOS batch job in
Windows, you could perhaps use something like...
for /f %%F in ('dir /b /on *.ps') DO
(...) add the definition of a bubble sort routine before
that (which I got from Wikipedia), and then modify /RunDir into the
snippet below. (...)
Thank you for caring to look for and post the code.
At first I became very excited about it. But then I tried it...
It does work. The problem
You don't necessarily have to wait to see what the Distiller would do.
ls -U shows the files unsorted, in the directory order, that is
probably the order in which the Distiller is using them.
Yes, Distiller uses the directory order. I made an experience at home. I
copied 10 files by
Rebooted with sync on that filesystem. Copied the files again to a newly
created dir, etc. The results are the same. Why doesn't the directory
order reflect the inode order?
Because of dir_index!
I just turned dir_index OFF with tune2fs. Now the directory order is the
same as the
I just turned dir_index OFF with tune2fs. Now the directory order is the
same as the inode order.
This makes the order of files predictable and in fact turns out to solve
my problem.
With dir_index turned OFF on that filesystem, when a copy is made to
another directory (even from Windows on a
and you thought that 2400 bps was fast too I bet. Having started at 300
bps, I was shocked at how fast 1200 bps was.
that was a couple of eons ago
That reminded me that I still used a 1200 one for a while, too.
When the first 14,400 modems appeared, I could not believe the speed.
The
Filipe, it is possible it is taking so long to do a sort because when
doing it, it caches it on the client side of Distiller also + does it on the
Samba Server to. IE; Sorts on Both Sides.
I tried it, several times, on a standalone Windows workstation and the
same happens.
I am not
Sounds like a bug in the program. Maybe it runs a separate instance for
each page in that mode and doesn't release any memory until it is all
finished. On something smaller or less complex it might not make much
difference, but if the memory use pushes into swap it will take much
Does there exist a GUI Front End for OpenLDAP admin for CentOS 5 (RHEL
5)?
From a Windows client you can see and manage your LDAP directory with
the free
LDAP Admin:
http://ldapadmin.sourceforge.net/
Under Linux, Luma
http://luma.sourceforge.net/
You can also manage your directory
We don't have any MS-Windows clients. The GUI must be Linux-based (this
includes a web-based system accessed via a standard web browser).
Under Linux, Luma
http://luma.sourceforge.net/
You can also manage your directory with a browser using the following
(among others):
Enjoy this..., 8000+ attempts.
I moved the ssh port from the standard 22 to a high port. The attempts
to break into my servers disappeared. The logs are clean now. I would
advise you to do the same. Choose a high ( 1024) unused port and
configure the clients accordingly.
Using a non default port is not the solution, because history has learned
that security by obscurity never worked.
It's not security by obscurity, moving the default port is just to not
see all that garbage in the log files - as the automated scripts don't
check for ssh on
Is there an equivalent of a useradd for systems that are using LDAP user
management? I know I can build an LDIF file and import it, but it is a bit
of a pain to do it manually all the time.
Is there not an easier / faster way
Smbldap-tools
https://gna.org/projects/smbldap-tools/
Is there an equivalent of a useradd for systems that are using LDAP user
management? I know I can build an LDIF file and import it, but it is a bit
of a pain to do it manually all the time.
Is there not an easier / faster way
Smbldap-tools
https://gna.org/projects/smbldap-tools
I
Isn't that only for samba-ldap? Can I still use them if I am not running
samba? I don't want to install and run Samba for no particular reason..
It can be used to create Posix accounts only.
The documentation resides here:
http://download.gna.org/smbldap-tools/docs/
You can try libuser, it's available in CentOS 5 (yum install
libuser) and apparently has support for LDAP.
libuser is an attempt to generalize the useradd/mod/del,
groupadd/mod/del commands to work with generic backends. The
implementation includes a module to work with an LDAP backend, I
what is your purpose with this Level? I'm asking because I had done some
raid level tests some time ago with hardware raid controllers/systems
from 3ware, sun and iscsi-raidsystems and some softwareraid setups.
The purpose of using RAID 10 is, of course, performance coupled with
full
Although they work, and do the same, the installer CD mdadm needs to
support it. The specific appliance that I want to install, doesn't
support RAID 10, so I need to install RAID 1 + RAID 0, i.e. setting 2x
RAID 1 mirrors, and then stripe then in RAID0 - but once the first 1
mirrors are
This page from openfiler.com clearly states the following:
Openfiler supports RAID 0, RAID 1, RAID 5, RAID 6 and RAID 10.
http://www.openfiler.com/products/openfiler-architecture
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Then maybe there is something wrong with your partitioning scheme or
even physical layout. What drives do you have and how are they
partitioned? How are they physically connected?
I beg your pardon, I didn't see your previous post with the above
information.
At this point, I think you
I don't know if this makes sense, but to get their RAID10, I first
need to install it, then use the web interface to setup RAID 10.
Instead I would like to have openfiler running on the RAID 10 setup as
well.
I don't think that you have a significant gain by doing so. Aren't you
being a
There is no option to setup RAID 10.
But, let's get back to my previous request,
How would one setup RAID 1+0 (i.e. 2x mirror'ed RAID1's and then a
RAID 0 on top of it) on say CentOS 4.6 ?
There is no option to setup RAID 10 because you are trying to create an
unsupported
in /etc/ldap.conf:
bind_policy soft
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I am burning the DVD ISO image to disk right now. It is available from
some mirrors.
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The checksum files are also there. SHA and MD5.
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I would strongly suggest that you wait for the actual announcements, but ymmv.
I noticed that the mirrors that don't have the images complete don't
even allow you to enter the 5.4 directory.
This particular one does and the checksum files check OK.
How does one switch ssh ports? What is a good port to use? What
ramifications does it have when I need to ssh in? Is it as simple as
ssh u...@hots:port?
In /etc/ssh/sshd_config replace port 22 with port whatever high port
( 1024) you like
Then configure your ssh clients accordingly.
How does one best turn of X-Windows? I dont need it, ssh works just
fine for me.
Just boot the computer into runlevel 3.
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Please does some one have any documentation, tutorial, how to
about setting up a PDC basing on Samba with a LDAP (OpenLDAP) backend ?
Samba 3 by Example, included with Samba in HTML and PDF formats:
Chapter 5. Making Happy Users
You can also find it online here:
You can use something like this Atom 525 dual core motherboard:
http://www.jetwaycomputer.com/NF99.html
Or this Atom C550 dual core board:
http://www.jetwaycomputer.com/NC9C.html
With the AD3INLAN-G daughterboard:
http://www.jetwaycomputer.com/Daughter_Board.html
This will give you 5
pci is a shared bus with a max of 2 gigabits. you'll see a gigabit but
never see two or more.
I am aware of that. But as I said it depends on your particular needs in
*concurrent* traffic. Although it cannot sustain simultaneous Gigabit
debits on all interfaces, i can sustain Gigabit
pci is a shared bus with a max of 2 gigabits. you'll see a gigabit but
never see two or more.
I am aware of that. But as I said it depends on your particular needs in
*concurrent* traffic. Although it cannot sustain simultaneous Gigabit
debits on all interfaces, i can sustain Gigabit bursts
I would defiantly stick with PCIe for 5 NICs. Additionally Realtek
NICs don't offer the best performance and their drivers are hit or
miss. The Supermicro board has Intel PCIe NICs onboard and a PCIe
expansion slot. This should give you full performance depending on the
Atom processor. It
The daughterboard I pointed to contains Intel 3 Gigabit chips.
Ooops, I meant *3 Intel Gigabit chips*.
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I'm assuming the OP is trying to save money. A firewall with 5xGbe
interfaces is going to thousands of dollars.
I was assuming the same. That's why I suggested the Jetway solution. I
is economic and works very well in many scenarios.
Not, of course, if you need *concurrent* Gigabit access on
I was assuming the same. That's why I suggested the Jetway solution. I
is economic and works very well in many scenarios.
Not, of course, if you need *concurrent* Gigabit access on several
interfaces. I stress *concurrent*
I built one of these to connect several vlans to a 24Mbit ADSL
Does it have to be 1RU ?
This one is 1U:
http://routerboard.com/pricelist.php?showProduct=98
13 Gigabit ports
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I think that the most secure setup is to use both LDAPI (ldap
connections over Unix sockets) for connections inside the ldap server
and TLS for connections from everywhere else on the network. Plus, ldapi
connections are much faster than TCP connections.
Am I wrong?
(...) I am hoping that someone here can give me some pointers, or point me to
some clear
how-to's somewhere. Any help is appreciated. Thanks
Some good guides on virtualization and LVM reside here:
https://access.redhat.com/knowledge/docs/Red_Hat_Enterprise_Linux/
vmware also has some
What I'm left wondering is:
1) Why you are relying on PATH expansion for this from something as
critical as a cron job. It is good sysadmin practice to specify
explicit paths for situations like this rather than to worry about
whether or not there is a good or valid reason for there
I am about to install a new server running CentOS 5.4. The server will
contain pretty critical data that we can't afford to corrupt.
I would like to benefit from the extra speed and features of a ext4
filesystem but I don't have any experience with it.
Is there some member of the list who can
For enterprise environments my favorite FS is XFS, YMMV, though.
I also thought about using xfs, but I don't like the idea of it being
dependent of an external kernel module that is always lagging behind the
current kernel version.
RedHat made the very questionable decision of NOT
(...) The xfs kernel module offered by CentOS
became kABI-compatible sometime ago -- meaning it survives kernel
updates.
That is a clear improvement over the previous situation. I did suspect
it but was not sure about it. Thank you for the information. I will do
some tests with xfs, then.
XFS is not stable on 32-bit systems. You should not use it there. You
need a 64-bit kernel.
Default for servers should be 64-bit now anyway. Not many reasons left
for a 32-bit system, and more and more 3. party applications have less
and less support for 32-bit platforms in general.
If they do what you want without making you wait, why even consider changing
the
filesystem that has been working for years on these machines?
Adding new, bigger disks and new filesystems? Wanting these to be the
fastest that is reasonably possible?
As for the system that arose the
I just made a new CentOS 5.4 installation. The machine has an Intel
10/100 and an Intel GB on board, and a Broadcom GB card on a PCI-X (64
bit) slot. After the install finished, I noticed that the order and
naming of the Ethernet interfaces is totally screwed up. Under Network
Manager, the
As I recall my solution was to comment out the modprobe alias created
for the network cards (/etc/modprobe.conf) and then in
network-scripts, use the HWADDR in each config script. Make sure the
device=ethX matches the name of the file, if nothing else, for your
own sanity - since the OS
Overall using CAT5 is a lot easier, just don't make the mistake of
thinking that it's ethernet. CAT5 just provides the wires, the
signaling is proprietary and would probably fry an ethernet port if
you plugged one in. I suggest using different color cables
specifically for the KVM
What you're referring to is accessing the KVM box itself via IP, which
the Aten does allow. What Aten *also* does is use CAT5 cable to link
the KVM switch to various adapters which plug into the server(s). It's
the signalling on those lines that Brian was referring to, not
remotely accessing
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