from:"Sean"

This is kind of odd.

[scarolan@host:~]$ cat loremipsum.txt
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec quis
ipsum sed elit laoreet malesuada. Quisque rhoncus dui vitae eros
euismod fermentum sollicitudin sem scelerisque. Nulla facilisi.
Maecenas mollis pulvinar euismod. Duis viverra pharetra turpis eget
feugiat. Nulla facilisi. Nullam facilisis, felis vitae lacinia
fermentum, enim erat placerat erat, vel imperdiet lorem velit et
ligula. Nam congue est in nisl lacinia lobortis. Vivamus elementum
lacinia sodales. Curabitur commodo risus tincidunt augue pulvinar
vehicula. Morbi eget velit sollicitudin nibh porta molestie. Maecenas
in augue id quam ullamcorper rutrum.

[scarolan@host:~]$ vi loremipsum.txt
[scarolan@host:~]$ myvar=$(grep lorem loremipsum.txt)
[scarolan@host:~]$ echo $myvar
Lorem ipsum dolor sit amet, co sectetur adipisci g elit. Do ec quis
ipsum sed elit laoreet malesuada. Quisque rho cus dui vitae eros
euismod ferme tum sollicitudi  sem scelerisque. Nulla facilisi. Maece
as mollis pulvi ar euismod. Duis viverra pharetra turpis eget feugiat.
Nulla facilisi. Nullam facilisis, felis vitae laci ia ferme tum, e im
erat placerat erat, vel imperdiet lorem velit et ligula. Nam co gue
est i   isl laci ia lobortis. Vivamus eleme tum laci ia sodales.
Curabitur commodo risus ti cidu t augue pulvi ar vehicula. Morbi eget
velit sollicitudi   ibh porta molestie. Maece as i  augue id quam
ullamcorper rutrum.

Where did all the letter n's go?
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Re: [CentOS] Variable assigned to grep output - missing letter n!

2011/7/20 Lamar Owen lo...@pari.edu:
 On Wednesday, July 20, 2011 03:23:58 PM Sean Carolan wrote:
 [snip]
 Where did all the letter n's go?

 I can't duplicate the problem here on a CentOS 5.6 box.  What locale are you 
 set to?  Here's what I get (note that a copy from the e-mail you sent 
 embedded newlines, which had to be stripped out (one of the many things xargs 
 makes trivially easy) to get the result):

Here's a simpler example, with a single line in the file:

[scarolan@server:~]$ cat loremipsum.txt
Lorem ipsum dolor sit amet, consectetur adipiscing elit. n n n n n
lots of letter n!

[scarolan@server:~]$ myvar=$(grep Lorem loremipsum.txt)

[scarolan@server:~]$ echo $myvar
Lorem ipsum dolor sit amet, co sectetur adipisci g elit.
lots of letter  !

Weird huh?
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Re: [CentOS] Variable assigned to grep output - missing letter n!

 [scarolan@server:~]$ echo $myvar
 Lorem ipsum dolor sit amet, co sectetur adipisci g elit.
 lots of letter  !

 Weird huh?

Ok, I'm a bonehead; I had this in my bash history:

IFS='\n'

That seems to have been the cause of the missing n's.  Now the next
question would be, how can I include the \n characters in my variable
string, without fudging with $IFS?
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Re: [CentOS] Variable assigned to grep output - missing letter n!

 (No, I don't advocate perl for everything, but knowing more about the
 problem can
 help in determining a suitable solution.)

You're right, I gave up and used python instead.  The basic idea here
was to gather together a long list of hostnames by grepping through a
few hundred files, check the list for duplicates, and alert someone if
duplicates were found.  I had a nifty one-liner using grep, sort, and
uniq -c that basically spat out a list of hosts with duplicate
entries, but in the end it was easier to manipulate the data (at least
for me) using python.

thanks

Sean
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[CentOS] Deleting a KVM virtual machine from the command line

2011-07-11 Thread Sean Carolan

I am working on a sandbox machine that will allow users to play around
with building virtual machines, then blow them all away each night
with a cron job.  I wrote a small script that uses the virsh command
to destroy the VMs, then remove the storage.  For some reason the vm
name still shows up in the virt-manager GUI.  Anyone have an idea how
you delete it from there as well, without using the GUI?

thanks

Sean
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Re: [CentOS] Deleting a KVM virtual machine from the command line

2011-07-11 Thread Sean Carolan

 Did you try:

 virsh undefine  domain-id

 where domain-id is your vm name

Perfect, thanks Earl!  Here's the script in case anyone else might
find it useful.  Please post any improvements if you can see a way to
improve it.

#!/bin/bash
# Removes all KVM virtual machines from this host

# First destroy all running VMs
for i in $(virsh -q list | awk '{ print $2 }'); do
  virsh destroy $i;
  virsh undefine $i;
done;

# Next we delete their virtual disk images
rm -rf /var/lib/libvirt/images/*.img
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[CentOS] /etc/hosts - hostname alias for 127.0.0.1

2011-03-07 Thread Sean Carolan

Can anyone point out reasons why it might be a bad idea to put this
sort of line in your /etc/hosts file, eg, pointing the FQDN at the
loopback address?

127.0.0.1hostname.domain.com hostname   localhost localhost.localdomain
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Re: [CentOS] /etc/hosts - hostname alias for 127.0.0.1

2011-03-07 Thread Sean Carolan

 First, if your host is actually communicating with any kind of ip-based
 network, it is quite certain, that 127.0.0.1 simply isn't his IP
 address. And, at least for me, that's a fairly good reason.

Indeed.  It does seem like a bad idea to have a single host using
loopback, while the rest of the network refers to it by it's real IP
address.

 Second, sendmail had the habit of breaking if your hostname was mapped
 to 127.0.0.1, but I stopped using sendmail a decade ago, so I can't
 verify this. :)

The reason this came up is because one of our end-users requested such
a setup in the /etc/hosts file, and I didn't think it was a good idea.
 Seems it would be better to fix the application(s) that require the
data to use the real network IP address.
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Re: [CentOS] /etc/hosts - hostname alias for 127.0.0.1

2011-03-07 Thread Sean Carolan

 (Make sure you pick .dummy so as not to interfere with any other DNS.)

 In theory you could leave off .dummy, but then you risk hostname being
 completed with the search domain in resolv.conf, which creates the
 problems already mentioned with putting hostname.domain.com in
 /etc/hosts.  (I have not tested this at all!)

I will probably just leave this decision to the application
architects, with the recommendation that we should simply use DNS as
intended...
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Re: [CentOS] Gnu Screen - terminal issues

2011-03-06 Thread Sean Carolan

 The remote host's $TERM variable is in fact xterm.  When I connect to
 the screen session the $TERM variable is 'screen'.

 Are you running screen locally or remotely?

Remotely.  My work machine is a laptop, which is not powered on all
the time.  Hence I use a remote box as a jumping-off point, and run my
screen sessions there.

 Or you could write a script, scp it to the hosts you want to run it on
 (testing first, natch), and exec it:

   for host in hostlist; do scp myscript $host:.; done

   [fiddle around with tests or verification as necessary]

   for host in hostlist; do echo ** $host **; ssh $host ./myscript; done

Yes, I do this quite a bit.  But there are often times when I have to
do interactive work, running different commands on various hosts.

 As I mentioned earlier, dsh (distributed ssh) is a very powerful tool
 for running multiple remote commands.  Puppet, cfengine, and other tools
 may also be useful.

Yes, thank you for the pointers.  I'm familiar with both puppet and
cfengine.  The GNU screen sessions are mainly used during the build
process, before a server has puppet or cfengine up and running.
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Re: [CentOS] Gnu Screen - terminal issues

2011-03-04 Thread Sean Carolan

 In this case, you might want to conditionally assign some reasonable
 value on failure.  Say:

    tput -T $TERM init /dev/null 21 || export TERM=xterm

 'tset -q' is another test which can be used.

The remote host's $TERM variable is in fact xterm.  When I connect to
the screen session the $TERM variable is 'screen'.  I think it's
because I'm opening a new ssh session in each screen window.  Not a
huge deal; I mainly use this for short commands, and if I need to run
something longer I just write it all out in a text editor and paste it
into the terminal.
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[CentOS] Gnu Screen - terminal issues

2011-03-03 Thread Sean Carolan

I really like gnu screen and use it everyday but there's one thing
that is a bit inconvenient, and that's the odd line wrapping and
terminal size issues that seem to pop up.  The problem crops up when I
type or paste a really long command, and then go back and try to edit
it; the text starts to wrap over itself and you have no idea what you
are editing.  Any fixes for this?
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Re: [CentOS] Gnu Screen - terminal issues

2011-03-03 Thread Sean Carolan

 You wouldn't by any chance be using PuTTY to access the session?  If
 so, you may need to play around with the terminal settings including
 the scroll type so that it displays correctly.  I don't recall the
 specifics but a similar thing happened to me.

Actually, no I'm using gnome-terminal on Ubuntu 10.10.  I wonder if
it's due to the fact that I'm ssh-ing to other machines within each
screen window?  Sometimes I will do this if I have a dozen servers to
work on at the same time, I have a little script that spawns a new ssh
session to each box in separate windows.  Here's a little tidbit that
I just learned; you can send the same command to all windows at the
same time:

[CTRL-A] :at \# stuff pwd; hostname; uptime^M

That will send the pwd, hostname, and uptime commands to all windows.  YMMV.
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Re: [CentOS] Load balancing...

2011-03-03 Thread Sean Hart

On 3/3/11 3:51 PM, aurfal...@gmail.com wrote:
On Mar 3, 2011, at 3:43 PM, Todd wrote:

Hi All,

Can anyone help me hash out how best to load balance a website that
is getting considerable traffic? In the past I only have experience
with BigIP where you have a load balancing device that keeps track
and send traffic to the best server possible at the time. This was a
proprietary system that I think was something Dell rebranded.

Right now, the whole site is is 400gb of video, HTML5, Apache, PHP,
MySQL, runs on a single box with 16gb of RAM and mirrored /var/www/
html (2x1tb raid level drives). I have a Comcast 50/10 connection, 5
statics and I am seeing about 125 unique visitors a day. The site
runs fine, but in anticipation of more traffic as well as a learning
experience I would like to load balance.

Obviously I need a second server just like the one it is running on
now. I will probably spec something out that is capable of 32gb of
RAM.

What about a dedicated load balancing device? What specs should this
be? How much RAM, HD, processor? It is sufficient to buy something
with a GB NIC and say 4gb of RAM? Can one go slower but more RAM,
small HD? I don't really quite know how intensive a task this
decision making process is for the load balancer..

Right now, as example, I have an Untangle Firewall and it runs on a
old AMD with 2gb RAM, GB NIC and it seems to do just fine.

My local computer store has several P4 2.8ghz with 2GB of RAM for
like $99

Can anyone enlighten me on specs, proper setup, caveats?
Well a bit outside what I know which isn't much, but...

What about external DNS provider with round robin DNS?

Or if you have control over your DNS, then you can easily do round
robin.

Qucik and ez faq on round robin;

http://www.zytrax.com/books/dns/ch9/rr.html

Hope this helps.

I do this for my mail servers.

- aurf
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Hello,

Building a high throughput, highly available site is a tough job, and
there's a reason good sysadmins get paid what they do. But to give you
some direction on Load Balancers.

BigIP (Made by f5) is the hands down leader of the Load Balancer world.
You will pay dearly for it (20K each, min), but depending on your needs,
may very well be the best choice for you.
http://www.google.com/url?sa=tsource=webcd=1sqi=2ved=0CCgQFjAAurl=http%3A%2F%2Fwww.zeus.com%2Fdocuments%2Fen%2FGa%2FGartner_Inc._Magic_Quadrant_for_Application_Delivery_Controllers_24.09.09.pdfrct=jq=load%20balancer%20gartner%20magic%20quadrantei=zipwTdeQG5TCsAOe1N3CCwusg=AFQjCNGeL_a0Jpco1EVVObiAS0mWSnbbqgcad=rja

Zeus also makes a decent product, made to run as software. The software
will run you ~9K I think, but is pretty feature rich. Requires hardware
to go with it. http://www.zeus.com/products/load-balancer/

IPVS or LVS can work as a really simple/free solution:
http://www.linuxvirtualserver.org/software/ipvs.html

Round robin DNS would balance load, but will cause problems if one of
them goes down.
You could also set up apache or squid to do proxying...

Cheers,
Sean
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Re: [CentOS] Load balancing...

2011-03-03 Thread Sean Hart


 Hi Sean,

 Can you explain as I may be planning this for a site.

 So if I have 2 identical servers, each with there own IP, how will  
 one
 of them going down cause issues?

 I'm assuming multiple A records for the same host will be handled  
 fine
 by the client lookup?
 example.com resolves to:
 host1.example.com - A.B.C.D
 host2.example.com - W.X.Y.Z

 1. Client performs DNS lookup and gets pointed to host2. All is well.
 2. host2 goes down. DNS for example.com still resolves to host2,  
 which is unreachable. Site is down.

Yeah, what they said!  I've done a few of these myself if you want to
chat further off the list about your specific needs and so forth.  I
don't contract or anything, but I'm down to give advice.

~Sean Hart
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Re: [CentOS] Sorting by date

2011-02-28 Thread Sean Hart

On 2/28/11 12:35 PM, erikmccaskey64 wrote:
 Original:
 Jan 23 2011 10:42 SOMETHING 2007.12.20.avi
 Jun 26 2009 SOMETHING 2009.06.25.avi
 Feb 12 2010 SOMETHING 2010.02.11.avi
 Jan 29 2011 09:17 SOMETHING 2011.01.27.avi
 Feb 11 2011 20:06 SOMETHING 2011.02.10.avi
 Feb 27 2011 23:05 SOMETHING 2011.02.24.avi


 Output:
 Feb 27 2011 23:05 SOMETHING 2011.02.24.avi
 Feb 11 2011 20:06 SOMETHING 2011.02.10.avi
 Jan 29 2011 09:17 SOMETHING 2011.01.27.avi
 Jan 23 2011 10:42 SOMETHING 2007.12.20.avi
 Feb 12 2010 SOMETHING 2010.02.11.avi
 Jun 26 2009 SOMETHING 2009.06.25.avi


 How could I get the output where the newest file is at the top?

Assuming you are getting the time from the ls -l command...

To sort within the ls command (man ls):
ls -lt

To sort after the ls command (man ls):
ls -al --full-time | awk '{print $6   $7   $9}' | sort -r

Not using ls:
To take that input and sort you'd have to do some hashing to translate
the months to a sortable format (like numbers) I think.  Alternatively,
you could use the listed date to generate a UTF date via the date command.  

~Sean



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Re: [CentOS] CentOS Donations - Is Money a Curse?

2011-02-20 Thread Sean

cornel panceac wrote:
 in (my) ideal world. money are not necessary. you give me centos, i 
 give you electricity, or hardware, or an office, etc . since we still 
 live in money-lenders ruled world, is there a way to contribute 
 (money) to centos but not directly? like, instead giving money, pay 
 the bill(s).
Core issue, I think, is the rights, privileges etc (the 'ownership' 
attributes -- whether explicit or implicit) which attach to making 
payments under most models. If/when my own little earner project fails 
to earn, it disappears, and little harm is done.
Sean
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Re: [CentOS] CentOS Donations - Is Money a Curse?

2011-02-19 Thread Sean

James B. Byrne wrote:
  But, our future financial support
 for CentOS is contingent upon dealing with an independent legal
 entity that conforms with national and international tax laws and
 corporate reporting requirements.

   
A new model (appropriate to OSS) is being worked on  here:
http://flattr.com/
But, apart from being slightly experimental, may not be appropriate 
either to your particular dilemma?
Sean
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Re: [CentOS] premature question on 5.6

2011-02-07 Thread Sean

Brunner, Brian T. wrote:
  
 You need to check ext4 is supported and compiled in you current kernel.
 Otherwise, you need to apply the patch, and re-compile your kernel. I
 assume that your kernel supports ext4.
And you may want to check certain tools have grown ext4 support. eg 12 
months ago either Clonezilla or Gparted (or both) did not.
Sean
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Re: [CentOS] centos 5.5 check memoray usage too high???

2011-02-02 Thread Sean Hart



On 2/2/11 1:58 PM, mcclnx mcc wrote:
 We have DELL R900 server with 128GB RAM (CENTOS 5.5)in it.  This server only 
 have one application running and few people use it.

 Every week I ata least get one or two messages from monitor tool mail to me 
 say:

 Message=Memory Utilization is 92.02%, crossed warning (80) or critical (90) 
 threshold. 

 Since server have 128 GB RAM and only 1 application.  I really don't belive 
 that.  Does there has some way can check memory utilitation ?


What is the output of the command free?

~Sean
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Re: [CentOS] Is it okay?

2011-01-22 Thread Sean







m.r...@5-cent.us wrote:
Lessee, FC10-FC13 ... but gnome is completely
broken, and you can't log
  in, then find that gnome is hostile to window manager switching ...
  

At least you got to late-FC before that one ... still UNFIXED since
RH8! ...(so KDE since for me).
Sean


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Re: [CentOS] Troubles for an non-IT beginner

2011-01-19 Thread Sean

Maybe ask what sort of cellphones your family use. If they use and are 
happy with old bw text ones (like me), then by all means pursue the 
Linux quest. But if they are up-to-the-minute snappy ones, or if they 
hang out for the latest, you are probably buying into headaches. 
Remember, Linux is always playing catch-up on toys produced for 
commercial OSes.
Sean

Parshwa Murdia wrote:
 But at least work could be done in Fedora too like without
 going into the technical details at least multimedia could be used,
 secured bank transactions could be done, prints can be taken and all
 this I guess without going into the core details we could do but only
 the knowledge of installation (GUI only) is required.
   
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Re: [CentOS] How to disable screen locking system-wide?

2011-01-19 Thread Sean Hart



On 1/19/11 11:49 AM, Rudi Ahlers wrote:
 On Wed, Jan 19, 2011 at 9:46 PM, Joshua Baker-LePain jl...@duke.edu wrote:
 On Wed, 19 Jan 2011 at 11:44am, Bob Eastbrook wrote

 By default, CentOS v5 requires a user's password when the system wakes
 up from the screensaver.  This can be disabled by each user, but how
 can I disable this system-wide?  Many of my users forget to do this,
 which results in workstations being locked up.
 Ctrl-Alt-Bksp will fix that right up.  I'm not a big fan of users leaving
 workstations unsecured when they walk away.

 --

 Don't you mean CTRL+ALT+DEL?

 I don't think the OP wanted a plaster, he wants a solution :)


I believe that CTRL-ALT-Bksp will restart X, not the computer.  On
restart of X you should be welcomed with the login screen.
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Re: [CentOS] perl code to remove newlines

2010-12-30 Thread Sean

Not sure exactly what you are trying to do, but Tie::File might be worth 
a look at if you haven't done so already?
Sean

ken wrote:
 Given an HTML file which looks like this:

 - begin snippet -
 HTML
   
 HEAD
 TITLE
 We've Lied to You#8230;/TITLE
 META
 
 NAME=GENERATOR
 CONTENT=Modular DocBook HTML Stylesheet Version 1.79LINK
 REL=HOME
 TITLE=Maximum RPM
 HREF=index.htmlLINK
 REL=UP
 TITLE=Using RPM to Verify Installed Packages
 HREF=ch-rpm-verify.htmlLINK
 ...
 - end snippet -

 I'm coding some perl to make it look something like this:

 - begin snippet -
 html
 head
 titleWe've Lied to You#8230;/title

 meta name=generator content=Modular DocBook HTML Stylesheet Version
 1.79

 link rel=HOME title=Maximum RPM href=index.html

 line rel=UP title=Using RPM to Verify Installed Packages
 href=ch-rpm-verify.html

 link 
 - end snippet -

 I've hit a wall trying to remove all the newlines.  I've tried it
 several ways... here's just one:

 - begin snippet -
 while ($in)
 {
 s/(\w*\W)/\L$1/g;   # Downcase XXX in XXX.
 s/\/(\w*\W)/\/\L$1/g;   # Downcase XXX in /XXX.
 if(/^/)  # if this line starts with ''
 { # then
   $curr = tell $in;   # Note current file position,
   seek $in, $prev, 0; # go back to previous line,
   chomp;  # remove its trailing newline char,
   seek $in, $curr, 0; # and reset position to current line.
 }
 else
 {
   $curr = tell $in;   # Note current file position,
   seek $in, $prev, 0; # go back to previous line
   s/\n/ /;# Append a space,
   chop;   # and then chomp.
   seek $in, $curr, 0; # and reset position to current line.
 }
 print;
 print $out;
 $prev = tell $in; # Location of previous line.
 }
 - end snippet -

 When I cat the output file, it looks like this:

 - begin snippet -
 GLOB(0x9fd587c)htmlGLOB(0x9fd587c)headGLOB(0x9fd587c)titleGLOB(0x9fd587c)We've
 Lied to
 You#8230;/titleGLOB(0x9fd587c)metaGLOB(0x9fd587c)NAME=GENERATORGLOB(0x9fd587c)CONTENT=Modular
 DocBook HTML Stylesheet Version
 1.79linkGLOB(0x9fd587c)REL=HOMEGLOB(0x9fd587c)TITLE=Maximum
 RPMGLOB(0x9fd587c)HREF=index.htmllinkGLOB(0x9fd587c)REL=UPGLOB(0x9fd587c)TITLE=Using
 RPM to Verify Installed
 PackagesGLOB(0x9fd587c)HREF=ch-rpm-verify.htmllinkGLOB(0x9fd587c)
 - end snippet -

 The output I should say *is* all on one line, not line-wrapped the way
 you see it above.  I have a hunch as to why there are the
 GLOB(0x9fd587c) thingies everywhere the newlines or spaces (' ')
 should be.  If some expert here could explain them, that would be really
 good.  More importantly though would be some instruction as to how to
 remove the newlines without creating all the GLOB(...) garbage.  Might I
 have to rewrite the script so to open the file in binary mode... or what?


 Maximum thanks for your assistance.




   
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Re: [CentOS] two cents or not two cents

2010-12-23 Thread Sean



Les Mikesell wrote:
 div class=moz-text-flowed style=font-family: -moz-fixedOn 
 12/21/2010 1:06 PM, Sean wrote:

If you can treat something as a black box and trust it, the size of
 the component isn't that important.
 If or IFF ..(IF AND ONLY IF)..?  A deep scepticism forces me to
 treat all boxes as grey no matter how long since last visited...
 (including my own, which are a sort of dark grey!?).

 Yes, especially my own.  That's the value of using components that are 
 maintained by others and widely used.   The code gets much better QA 
 than I could ever do myself and all you have to do is peek at the mail 
 list once in a while to know if previously-working interfaces are 
 going to be broken if you update.  For things from the base CentOS 
 package repositories and to a slightly lesser extent EPEL, you can 
 assume someone else has already made sure that the updates aren't 
 behavior-changing and required dependencies are met.

 Java stuff seems to be more self-contained so there is a little more 
 freedom to mix component versions between applications and you aren't 
 completely tied to someone else's update schedule.

Yes, superior exploitation must be granted Java (over say Cpan, 
C-libraries etc) in scenarios that are naturally exploitation-heavy, 
such as you indicate. But for everything? Hmmm.
A long ago tale goes thus: There was once a problem I would have 
attacked with half a page of Prolog had I known I would end up writing 
all the code myself, no matter how hard to actually get it right. I 
conceded to Java for the sake of team effort and wrote my portion as far 
as I could, but was unable to test properly without the other 3 portions 
which, as it turned out, never eventuated. Towards the death knell I 
stayed up and wrote them myself, chapter after chapter .. on .. and on 
.. and on. It ran, but no surprise it produced incorrect results, and 
too much code to go back through and try fix all that spaghetti logic in 
the time available. A lesson learnt, and I haven't written a line of 
Java since!
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Re: [CentOS] two cents or not two cents

2010-12-21 Thread Sean



Les Mikesell wrote:
   If you can treat something as a black box and trust it, the size of 
 the component isn't that important.
If or IFF ..(IF AND ONLY IF)..?  A deep scepticism forces me to  
treat all boxes as grey no matter how long since last visited... 
(including my own, which are a sort of dark grey!?).

Sean
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Re: [CentOS] two cents or not two cents

2010-12-21 Thread Sean


  a bug in bdb made them regularly overwrite random adjacent data, 
 including other people's accounts.  It was not a fun experience. 
ouch! I wonder if a Perl 'tied-hash' interface was being implemented 
along with BDB 'duplicate keys'? A definite no no. You would certainly 
get overwrites, though not quite random.

Sean
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Re: [CentOS] two cents or not two cents

2010-12-20 Thread Sean


  And there are IDEs like eclipse that do a lot of the grunge work 
 boilerplate for you, and maven to manage components as you scale up.
eclipse froze my first FC4 tryout ... is for me what BerkeleyDB is for you.

 I do agree personally - I can't think in java and do much better when 
 you can squeeze the logic of a routine onto one page where you can see 
 it all at once.
 .
 I'd relate the importance of code size to the amount of RAM you can 
 afford.  For a long time now it has been cheaper to buy RAM than to 
 hire someone capable of shrinking your code base - unless maybe you 
 have a mass-market application that will run on millions of boxes.
By 'size' I was actually referring to 'source size' :  (1) you say it 
above ..[all micro] logic..[on] one page ...(2) the same idea but 
in a project-macro-logic sense viz a viz sheer quantity of code lines to 
manage overall.
I do rate java for designing GUI-interfaces. No argument there. GUI 
components ARE objects. But most of the real world aint ..(malfits being 
the reason for extensibility in OOP).. and it turns out I think that 
re-usability mostly goes hugely custardly. (And aside, if best 
programming is the truly 'creative' kind, not just spending time finding 
the right lego blocks to make new combinations with, then OOP fits badly 
anyway).

 Why BerkeleyDB? I dont know of an embedded-db equivalent that will 
 store
 'any and every data exactly as is'.

 I'd think sqlite first - these days anyway.  

 You can always do input into temporary tables structured more like the 
 input data and process to normalized form later (if needed).
Not if normalising implies any user-interactivity (the usual scenario). 
An early input in the automated background input stream off the wire 
generates some KEY which a later input of the same stream hours later 
may try to match against. Would the latest sqlite accept a KEY that was 
say ( maybe badly) both QP-encoded and HTML-encoded, and even if it did 
so now would that be guaranteed to endure through future versions of 
those encodings without ever rejecting? Even if the 'normalising' could 
be automated satisfactorily to avoid all rejections for sqlite right now 
within the capture process, it would be biased to sqlite's constraints, 
an unwanted extra layer that may well also actually corrupt the heavy 
duty (search-engine)-normalising already being performed on difficult 
data ..(eg stemming, scoring, indexing).

In a sense, BDB serves the temporary tables suggestion already, but so 
much more as to be sufficient in itself. You seem unduly anti-BDB? Quite 
frankly I have had far less trouble with it than any other db ever. In 
the past year I have had to do one dump/(re)-load [about 1 hour], and 
twice delete the environment files [about 1 minute] so that they would 
self-rebuild on next access. That's it!

Which doesn't mean I'm not also always open to suggestions.


 Sqlite should be equally usable - and easier to convert to/from server 
 backends.  That might not have been true long ago, though.
 If you had moved to Centos3 as the first step, you could have run that
 with nothing more drastic than a periodic 'yum update' for years, then
 jumped to Centos5 with no rush to change again even now.
 Ah, now you tell me!
 You should have asked sooner.   I still have a few centos3 boxes going 
 strong. I had problems with perl modules and a few other things in the 
 early stages of centos4 and skipped over that for most systems.
And proves that the time I can make available for discovery falls short 
by heaps. Nearing closure on a very long project right now, thinking 
ahead to next steps, reviewing the robustness of past decisions, is very 
enjoyable and an unusual luxury for me. Playing the 'distro-hopping' 
game that many seem to indulge in for instance has just been out of the 
question.
I have some processes shared with win boxes over RPC (producung excel 
charts) which require that both Perl version and versions of modules 
like Storable.pm exactly match, so am largely at the mercy of  what the 
Activestate repo provides as to what must be run on the linux box too.
I need lots of browsers too (alongside Firefox) for day to day work. The 
old versions of Mozilla, Konqueror and Opera which will run under FC4 
are critically dysfunctional on some operations needed. So am looking to 
try a more up to date team.
CentOS is beginning to look more  more like my cup of tea, and since I 
gather that a new major is immanent maybe it will support the new Google 
Chrome (along with Seamonkey, Opera-11+)? I wonder if there is a list of 
packages somewhere. If the repo web-page for CentOS provided the actual 
repo-address I was going to try direct my FC4-yum there for listings, 
but cannot seem to find it. It may be still the case that I cannot have 
'both worlds' on one box, or maybe I can try a CentOS + VM-XXX 
configuration hmmm.

Sean
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Re: [CentOS] two cents or not two cents

2010-12-19 Thread Sean



Les Mikesell wrote:
 div class=moz-text-flowed style=font-family: -moz-fixedOn 
 12/18/10 3:24 PM, Sean wrote:


 Or, you might move to java for a more self-contained, OS/distribution
 independent way of doing things.

 Why Perl? Because writing/maintaining 20,000 lines of terse Perl code is
 manageable, whereas the equivalent 200,000+ in Java ruled itself out at
 the very beginning, (even at a time when I knew some Java but no Perl).
 A practical decision I clap myself on the back for every single day
 despite knowing that had I gone with Java (and this project fallen over
 long ago) I could now be getting big quids from some corporate developer
 who needs a team of new Java graduates overseen.(hm or was it
 the right decision?).

 Starting from scratch now or recently, it would be hard to argue 
 maintainability for perl vs. java, but back in java 1.4 days or 
 before, it was probably the right choice.  But java sort of isolates 
 you from changes in the rest of the platform.  And groovy eliminates 
 most of the unnecessary verbosity if you don't mind a bit of a 
 performance hit.

Groovy is new one on me -- what is it? And surely the driver behind 
widespread Java adoption is still that others maintain your code more 
easily (ie the corporate/factory model), implying a price still to pay 
for a developer who just needs to maintain own code suite? Besides being 
anathema to me, strong data typing, for example, is also just one 
feature that explodes code size, but fits perfectly with the factory 
model. In 5+ years of intense coding with non-typed R/Basic I recall a 
total of maybe 3 compile-crashes from trying to do math on a string 
(seriously a non-issue for the die hard maverick!)  Is code size 
under-rated?, conveniently swept under the carpet?

 Core Perl stability? I agree.

 Why BerkeleyDB? I dont know of an embedded-db equivalent that will store
 'any and every data exactly as is'.

 I'd think sqlite first - these days anyway.  BerkelyDB had bugs in 
 growing existing items way to long for me to ever trust it again.  Or 
 use a server instead of embedding anything.  Either postgresql or 
 mysql are fairly trouble-free although they've had their own 
 version-specific issues.   Or if you need scale, look at something 
 like riak.
I do use postgresql for data that is person-entered, ie where 
interactivity facilitates personal on-the-spot correction of rejected 
inputs. The inbuilt constraints of the server db-model clearly targets 
multi-person updaters who may or may not be focussing on what they are 
doing. Great for keeping mega stores of artificially structured (simple) 
stuff like phone lists, not so good at accepting all the vagaries the 
real world may throw at it in automated background capture scenarios, 
sometimes from suspect sources. BerkeleyDB may break occasionally, but 
is recoverable with basic OS tools and text-editor if provided recovery 
tools fail (not locked in a proprietary binary closet -- been there, 
done that, still hurting!).

 Originally on RH8 for 3/4 years, the first attempt to port onto a brand
 new release of FC4 broke everywhere. The second attempt a year or so
 later went better and remains. In the meantime FC support philosophy has
 tightened/altered to the point where I simply must abandon it. I believe
 it has become just an 'alpha test ground' for RHEL. Reminds me of the
 painful Dos saga -- the first version to work properly (Dos-6) was just
 about irrelevant when finally released. So yes, CentOS has come into my
 sights ... (and I'm a bit long in the tooth to tiptoe around as you may
 have gathered!).

 If you had moved to Centos3 as the first step, you could have run that 
 with nothing more drastic than a periodic 'yum update' for years, then 
 jumped to Centos5 with no rush to change again even now.
Ah, now you tell me!

Sean
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Re: [CentOS] two cents or not two cents

2010-12-18 Thread Sean



Les Mikesell wrote:
 div class=moz-text-flowed style=font-family: -moz-fixedOn 
 12/17/10 2:12 PM, Sean wrote:
 Interesting, and probably worth a play with indeed, although I tend to
 steer clear of Bash (unhappy with) whenever possible to do the same in
 Perl (happy with). I imagine there is machine level stuff involved that
 would rule out a pure Perl version?
 However, my difficulties for OS replacement are not so much the OS setup
 itself but the 'production' stuff that needs to go on top and a raft of
 dependencies -- compilers, BerkeleyDB, myriad Perl modules etc etc etc.
 Since the system is 'live', I usually have to run 2 versions in parallel
 for a long time... so lots of rollbacks, synchronising overhead and so
 on. Usually newer versions of some things have to be replaced with older
 versions and then inter-dependency issues arise... some of the stuff I
 upgraded specifically for suddenly stops working. You are familiar with
 the general picture, I'm sure.
 But thanks for the thought.

 You didn't exactly make it clear whether you've used CentOS or not, 
 but keeping those interfaces from changing in ways that break things 
 that used to work is the whole point of 'enterprise' distributions and 
 CentOS inherits the work of backporting bug/security fixes without 
 introducing behavior changes over the long life span from RHEL.

 You might also do your own homework and avoid components with a 
 history of breaking backwards compatibility (like BerkeleyDB...).  As 
 you have probably noticed, core perl has excellent historical 
 stability - interpolating unquoted @ in strings is just about the only 
 change in perl 5 that might require a change all the way back from 
 perl1 code.  But the modules are done by lots of other people and 
 occasionally are re-factored in ways that require coordinated changes. 
 If you are getting these from a 3rd party repository, someone else has 
 usually done the work of vetting the dependencies among them.

 Or, you might move to java for a more self-contained, OS/distribution 
 independent way of doing things.

Why Perl? Because writing/maintaining 20,000 lines of terse Perl code is 
manageable, whereas the equivalent 200,000+ in Java ruled itself out at 
the very beginning, (even at a time when I knew some Java but no Perl). 
A practical decision I clap myself on the back for every single day 
despite knowing that had I gone with Java (and this project fallen over 
long ago) I could now be getting big quids from some corporate developer 
who needs a team of new Java graduates overseen.(hm or was it 
the right decision?).

Core Perl stability? I agree.

Why BerkeleyDB? I dont know of an embedded-db equivalent that will store 
'any and every data exactly as is'.

Originally on RH8 for 3/4 years, the first attempt to port onto a brand 
new release of FC4 broke everywhere. The second attempt a year or so 
later went better and remains. In the meantime FC support philosophy has 
tightened/altered to the point where I simply must abandon it. I believe 
it has become just an 'alpha test ground' for RHEL. Reminds me of the 
painful Dos saga -- the first version to work properly (Dos-6) was just 
about irrelevant when finally released. So yes, CentOS has come into my 
sights ... (and I'm a bit long in the tooth to tiptoe around as you may 
have gathered!).

Sean
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Re: [CentOS] two cents or not two cents

2010-12-17 Thread Sean

Ah, a reminder that it is always dangerous to unveil the vague? Sorry 
... I should have pre-read 6000 pages from Redhat ... (but maybe I did!).
Sean

Michael R. Dilworth wrote:
 I'm sorry (I know don't feed the trolls), but recently 
 there have been quite a few remarks resembling this. 
 Also, I'm beginning to believe the remark made earlier
 by ???, which roughly stated Each time a new release 
 is due, the flame wars erupt.

 Just what part of CentOS is a Mirror or Redhat OS do 
 you miss?

 Now please, return to the rpm building and raid/lvm 
 discussions, as I find them very interesting and
 educational.

 michael...
  

   
 -Original Message-
 From: centos-boun...@centos.org [mailto:centos-boun...@centos.org]on
 Behalf Of Sean
 Sent: Thursday, December 16, 2010 2:46 PM
 To: centos@centos.org
 Subject: [CentOS] two cents or not two cents


 Hello Producers

 Longevity of Support is an attractive drawcard for CentOS if it means 
 the exact opposite of Fedora's short support cycle that does not 
 provide updating of infrastructural libraries for very long, libraries 
 which newer versions of applications (like Firefox, Thunderbird, Opera 
 etc) depend on and which wont install unless the libraries are also 
 newer versions? But is that what it means -- ie that those 
 infrastructural libraries (libpango, libcairo etc) are continuously 
 updateable to fairly recent versions?

 If so, the problem is in reconciling that meaning with the reputation of 
 CentOS to only support older versions of applications (eg Firefox-1.5, 
 Thunderbird-1.0 etc). It does reconcile, of course, if  the implications 
 are merely that the CentOS user must compile and install the later 
 versions of such applications from source, rather than having the luxury 
 of pre-packaged binaries. It doesn't reconcile if there is some other 
 critical reason why newer such applications just wont install. But which?

 I ask here because the profusion of vague mission statements and 
 'target-enduser-profile' claims that litter the internet re '*nix 
 distros' seldom actually address those real issues. And hopefully 
 someone can enlighten. My complex production  developement desktop 
 takes months to fully port to a new OS (or OS-version), so OS updates to 
 get library updates (ala Fedora philosophy) becomes increasingly untenable.

 Then there is a further question, I'm afraid. Since CentOS also does 
 specifically target the profile of a so-called 'enterprise/server-user' 
 what does that actually entail. Does it mean concrete security 
 strictures which bolt down non-'root' users or does it merely mean the 
 availability of SELinux (but which can be turned OFF)? For instance, 
 (with SELinux OFF), can a user still:
 (a) su root via Kterm anytime?
 (b) Access services-admin anytime via Menu+Pam to control printers, 
 modems, daemons etc?
 (c) compile
 (d) have 6 to 8 desktops running
 (e) call up 'konquerorsu.desktop' (root-konqueror with embedded root-Kterm)
 (f) have normal cron scheduling
 .. maybe more, 
 but that's a start.

 Thanks for listening.

 Sean



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Re: [CentOS] two cents or not two cents

2010-12-17 Thread Sean

Interesting, and probably worth a play with indeed, although I tend to 
steer clear of Bash (unhappy with) whenever possible to do the same in 
Perl (happy with). I imagine there is machine level stuff involved that 
would rule out a pure Perl version?
However, my difficulties for OS replacement are not so much the OS setup 
itself but the 'production' stuff that needs to go on top and a raft of 
dependencies -- compilers, BerkeleyDB, myriad Perl modules etc etc etc. 
Since the system is 'live', I usually have to run 2 versions in parallel 
for a long time... so lots of rollbacks, synchronising overhead and so 
on. Usually newer versions of some things have to be replaced with older 
versions and then inter-dependency issues arise... some of the stuff I 
upgraded specifically for suddenly stops working. You are familiar with 
the general picture, I'm sure.
But thanks for the thought.
Sean
 div class=moz-text-flowed style=font-family: -moz-fixedOn Fri, 
 17 Dec 2010, Sean wrote:

 To: centos@centos.org
 From: Sean s...@orcon.net.nz
 Subject: [CentOS] two cents or not two cents

 Hello Producers

 Longevity of Support is an attractive drawcard for CentOS if it means
 the exact opposite of Fedora's short support cycle that does not
 provide updating of infrastructural libraries for very long, libraries
 which newer versions of applications (like Firefox, Thunderbird, Opera
 etc) depend on and which wont install unless the libraries are also
 newer versions? But is that what it means -- ie that those
 infrastructural libraries (libpango, libcairo etc) are continuously
 updateable to fairly recent versions?

 If so, the problem is in reconciling that meaning with the reputation of
 CentOS to only support older versions of applications (eg Firefox-1.5,
 Thunderbird-1.0 etc). It does reconcile, of course, if  the implications
 are merely that the CentOS user must compile and install the later
 versions of such applications from source, rather than having the luxury
 of pre-packaged binaries. It doesn't reconcile if there is some other
 critical reason why newer such applications just wont install. But 
 which?

 I ask here because the profusion of vague mission statements and
 'target-enduser-profile' claims that litter the internet re '*nix
 distros' seldom actually address those real issues. And hopefully
 someone can enlighten. My complex production  developement desktop
 takes months to fully port to a new OS (or OS-version), so OS updates to
 get library updates (ala Fedora philosophy) becomes increasingly 
 untenable.

 You might be interested in giving my ALI scripts a whirl on a spare 
 machine (even an old laptop)  to start with, so you get used to how 
 they work.

 I wrote these especially to deal with doing a fresh linux installation.

 http://www.karsites.net/centos/anyuser/auto-linux-installer.php

 I can set up the services I want running in under 10 seconds. Beats 
 sitting there doing it manually for 3 days!

 The general idea is that you modify the installer scripts to work with 
 a particular system - just do it one time. Then you can replay the 
 scripts as often as you want, to re-install your system.

 Please let the list know if they help with your installation/update woes.

 BTW. Some applications such as Firefox need to be updated to their 
 latest versions, otherwise websites will not work with an older 
 version. I had these issues with running an old version of FF on 
 Fedora 8. I went from F8 to F12 using my ALI scripts without any 
 problems.

 Kind Regards,

 Keith Roberts

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[CentOS] two cents or not two cents

2010-12-16 Thread Sean

Hello Producers

Longevity of Support is an attractive drawcard for CentOS if it means 
the exact opposite of Fedora's short support cycle that does not 
provide updating of infrastructural libraries for very long, libraries 
which newer versions of applications (like Firefox, Thunderbird, Opera 
etc) depend on and which wont install unless the libraries are also 
newer versions? But is that what it means -- ie that those 
infrastructural libraries (libpango, libcairo etc) are continuously 
updateable to fairly recent versions?

If so, the problem is in reconciling that meaning with the reputation of 
CentOS to only support older versions of applications (eg Firefox-1.5, 
Thunderbird-1.0 etc). It does reconcile, of course, if  the implications 
are merely that the CentOS user must compile and install the later 
versions of such applications from source, rather than having the luxury 
of pre-packaged binaries. It doesn't reconcile if there is some other 
critical reason why newer such applications just wont install. But which?

I ask here because the profusion of vague mission statements and 
'target-enduser-profile' claims that litter the internet re '*nix 
distros' seldom actually address those real issues. And hopefully 
someone can enlighten. My complex production  developement desktop 
takes months to fully port to a new OS (or OS-version), so OS updates to 
get library updates (ala Fedora philosophy) becomes increasingly untenable.

Then there is a further question, I'm afraid. Since CentOS also does 
specifically target the profile of a so-called 'enterprise/server-user' 
what does that actually entail. Does it mean concrete security 
strictures which bolt down non-'root' users or does it merely mean the 
availability of SELinux (but which can be turned OFF)? For instance, 
(with SELinux OFF), can a user still:
(a) su root via Kterm anytime?
(b) Access services-admin anytime via Menu+Pam to control printers, 
modems, daemons etc?
(c) compile
(d) have 6 to 8 desktops running
(e) call up 'konquerorsu.desktop' (root-konqueror with embedded root-Kterm)
(f) have normal cron scheduling
.. maybe more, 
but that's a start.

Thanks for listening.

Sean



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[CentOS] Possible to reboot a system after kickstart installation without pressing a key?

2010-10-31 Thread Sean Carolan

The subject just about says it all - I'm wondering if there is a way
to do a completely hands-off installation, including the reboot at the
end, without Press any key to continue?
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Re: [CentOS] Possible to reboot a system after kickstart installation without pressing a key?

2010-10-31 Thread Sean Carolan

 Use the 'reboot' option in your kickstart.

Isn't this the default anyway?  I will try to specify it explicitly
and see how it works...
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Re: [CentOS] Possible to reboot a system after kickstart installation without pressing a key?

2010-10-31 Thread Sean Carolan

On Sun, Oct 31, 2010 at 6:07 AM, Sean Carolan scaro...@gmail.com wrote:
 Use the 'reboot' option in your kickstart.

 Isn't this the default anyway?  I will try to specify it explicitly
 and see how it works...

Looks like that did the trick, thanks Markus!
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Re: [CentOS] adding user ldif to ldap

2010-10-28 Thread Sean Hart


 Here is the error:

 LDAP# ldapadd -x -D cn=Manager,dc=summitnjhome,dc=com -W -f /tmp/passwd.ldif
 adding new entry uid=root,ou=People,dc=summitnjhome,dc=com
 ldap_add: Invalid syntax (21)
 additional info: objectClass: value #6 invalid per syntax

I believe this is complaining about the 6th entry in the objectClass 
field (starting at 0, I think meaning the kerberosSecurityObject).  If 
you look at the schema entry for that objectClass, there may be 
restraints on the class that are not permitting you to add...
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[CentOS] Sendmail - block mail based on recipient address?

2010-10-25 Thread Sean Carolan

Maybe someone can help me sort this out.  I want to block outbound
mail from my network based upon the recipient address.  Internal
servers should still be allowed to send emails, but not to a few
specific addresses.  I've tried creating some rules in
/etc/mail/access but to no avail.  Is it possible to do this?
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Re: [CentOS] Sendmail - block mail based on recipient address?

2010-10-25 Thread Sean Carolan

 lefgifu with: sendmail access TO

 http://www.feep.net/sendmail/tutorial/anti-spam/access_db.html

 'The left hand side of each entry can optionally be prefixed
 with one of the tags To:, From:, or Connect:.'

Yes, I have tried this.  I have entries like this in my access file:

To:staff...@unwantedcompany.comDISCARD

Yet mail to staff...@unwantedcompany.com goes through just fine.  I
think I may be missing something here.
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Re: [CentOS] Sendmail - block mail based on recipient address?

2010-10-25 Thread Sean Carolan

 One silly thing (but needs to be asked):

 Did you rebuild access.db after editing access?

Yes, the rebuild command is built into my init script.  I just double
checked it.

I'm getting better results having changed the setting to REJECT
instead of DISCARD.  I will investigate a bit further when I have some
spare time.  For now I have verified that the mail server is rejecting
all mails to the problem addresses.
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Re: [CentOS] No last command in VIM?

2010-10-21 Thread Sean Hart


On 10/21/10 9:48 AM, John Kennedy wrote:

Is there an alias hanging around that is redirecting you?
John

On Thu, Oct 21, 2010 at 12:36, Scott Robbins scot...@nyc.rr.com 
mailto:scot...@nyc.rr.com wrote:


On Thu, Oct 21, 2010 at 06:19:54PM +0200, Dotan Cohen wrote:
 Although I made sure that vim-enhanced.i386 is installed, pressing :
 then upArrow does not show me the last command that I've typed.
Might
 I still be using vim-minimal erroneously? How to fix that? I
don't see
 any mention of this in google or the past few months of fine
archives.

One possible guess, but it's a guess only and I don't have high hopes
for it


Is there possibly a /bin/vi which takes precedence over /usr/bin/vim?
(Or is the command vim-enhanced?)

If you do which vim it should show you the path of exactly which vim 
you are using...  There is a history optin in vimrc, is it possible you 
set this to 0?  I believe it sets the number of lines to keep in history.


Cheers,
Sean
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Re: [CentOS] how to do repetetive command in shell

2010-10-21 Thread Sean Hart


On 10/21/10 11:45 AM, Roland RoLaNd wrote:

Dear all,

i'm writing a certain script which does a specific task in a 
repetitive manner, i'm going to give a similar script with the same 
concept hope you could advise me to a better way:



Try for
http://www.cyberciti.biz/faq/bash-for-loop/
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Re: [CentOS] LDAP Mail Notice







Maybe what i said is not clear, because my English is too pool .
Please forgive me if  my expression is not precise.


Doesn't matter what mail server you use, email is email.



 The following  is my environment :

Workspace Environment : CentOS 5.5  64bits  , Using Openldap
Server  or 389 LDAP Server

Mail Server :  Windows  Mail Server

For example :

If I create the new account called Tim on LDAP Server  , and his
password is 123456 , and his mail address is t...@test.com
mailto:t...@test.com
Then will send an E-mail to him to notice his information , like
his name and his passowrd.


So Would someone can give some suggestions ?

Before we go any further on this, I'd like to give a very serious 
warning.  It is NEVER a good idea to email a password.  Email is, by 
definition, insecure.


I'm not familiar with 389 LDAP Server, and after a quick look, it would 
make sense for me to read up on it.  Anyhow, my advice is going to come 
from the OpenLDAP side of things.


I would:

  1. Set up OpenLDAP (make sure to get a real certificate and require
 TLS/SSL)
  2. If using Samba, set up the smbldap tools
 (http://en.wikipedia.org/wiki/Smbldap-Tools), can be useful even
 if not using samba...
  3. Start script (I'd use perl, since it's what I'm most familiar with)
1. Generate username (either collect from input or generate somehow
2. Generate password (There's a sub for that on the page
   referenced earlier)
3. Contemplate making sure that the username is unique, and
   group membership, etc.
4. call smbldap-useradd to add the user (add stuff like -m for
   the mail address, check the smbldap-useradd documentation
   for handy switches
5. Compose body of email to user (this is probably mostly
   static, but you will most likely want to substitute some
   variables like username, etc
6. send the email (sub on the page earlier)
7. I repeat, please don't email passwords...  have them call
   you for them or something...  email is the least secure
   thing on the damn planet
  4. Sit back and have a beer, cuz yer done

I'm happy to help if you need more.

Cheers,
Sean

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Re: [CentOS] One server not showing SSH port, the other is.


 Just disable password authentication on ssh and use only keyfiles ..

 --
My initial thought exactly.  Keys, and require passwords on the keys 
too.  Although if you want to be wicked paranoid, knocking + keys would 
work too.

~Sean
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Re: [CentOS] Openwebmail emergency (Perl)


 Transaction Check Error:
 file /usr/lib/perl5/vendor_perl/5.8.8/Compress/Zlib.pm from install
 of perl-Compress-Zlib-2.015-1.el5.rf.noarch conflicts with file from
 package perl-IO-Compress-2.030-2.el5.rf.noarch
 file /usr/share/man/man3/Compress::Zlib.3pm.gz from install of
 perl-Compress-Zlib-2.015-1.el5.rf.noarch conflicts with file from
 package perl-IO-Compress-2.030-2.el5.rf.noarch

Not sure if this will help... Have you tried updating perl-IO-Compress?
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Re: [CentOS] Openwebmail emergency (Perl)

  On 10/11/10 11:51 PM, Jussi Hirvi wrote:
 It seems Openwebmail is using Perl-Compress-Zlib from rpmforce, but in
 Centos this is obsoleted by Perl-IO-Compress, and there is a conflict.

 This I got when I tried to install the rpmforce package:

 [r...@mail log]# yum install perl-Compress-Zlib
 Loaded plugins: fastestmirror, installonlyn
 Loading mirror speeds from cached hostfile
* addons: ftp.funet.fi
* base: ftp.funet.fi
* extras: ftp.funet.fi
* rpmforge: wftp.tu-chemnitz.de
* updates: ftp.funet.fi
 Setting up Install Process
 Package perl-Compress-Zlib is obsoleted by perl-IO-Compress, trying to
 install perl-IO-Compress-2.030-2.el5.rf.noarch instead
 Package perl-IO-Compress-2.030-2.el5.rf.noarch already installed and
 latest version
 Nothing to do
In that case, it depends on how brave/desperate you are ;)

First off... You had better have a backup of your system.  If you don't 
already, you've learned a valuable lesson, but still get one RIGHT NOW.

Is there anything on the Openwebmail forums/mailing lists?  I can't 
imagine you are the only one facing this.

Next, you could try removing the conflict or getting the required Zlib 
package (rpm or sourced from cpan) and force install, but I don't really 
recommend.  I don't use Openwebmail, so I can't speak to the 
requirements there.

Good luck,
~Sean

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Re: [CentOS] LDAP Mail Notice

2010-10-11 Thread Sean Hart



 I have a thought of  writing the script to implement the LDAP mail 
 noticerecently.

 That's to say , after creating the new account and his passwd , then 
 how to send an E-mail to notice him?

 By the way , I used the LDAP tool called 389 LDAP or openldap  recently .



 Could someone give me some suggestions ?


What precisely are you looking to do?  Are you trying to write a script 
to create a user and email them?  If so, I've definitely done that.  I 
put together a bunch of tools a while back if you are looking for some 
building blocks (including a send mail to user sub and a lot of 
retrieve/set LDAP attributes).  A lot of this was put together from 
other stuff I found on the web in my years of LDAP administration.

Disclaimer: I'm a self taught perl guy, so I don't know all of the 
tricks, etc

http://xrayspx.com/part-3-subroutines

If you give me a better idea of exactly what you are looking for I'm 
sure I could whip something up.

Cheers,
Sean
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Re: [CentOS] e2fsck with millions of files

2010-09-18 Thread Sean Carolan

 I'm not sure how much 64-bit support the kernel expects so there might be some
 complications going that direction, but you can certainly install a 64-bit
 system and run the 32-bit versions of the apps and have both versions of most
 libraries available.

To bring some closure to this thread, I ended up using a 64 bit Ubuntu
Desktop Live CD which comes with e2fsck version 1.41.  Here are the
steps required:

sudo /bin/su - root
modprobe dm_mod
apt-get install lvm2
vgscan
vgchange -a y
lvscan
e2fsck /dev/path/to/partition

This worked and the fsck completed within a few hours.
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[CentOS] e2fsck with millions of files

I have a large (1.5TB) partition with millions of files on it.  e2fsck has
been running nearly 12 hours and is still on Checking directory structure.
 Any tips for speeding this along?
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Re: [CentOS] e2fsck with millions of files

 Yep, same answer here, I had RHEL4.8 on a 2.6 TB MSA, and you just leave it 
 going over the weekend.

I kind of figured as much; we're letting ours run during the week so
that hopefully the partition will be ready for weekend backup jobs.
Thanks for the feedback.
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Re: [CentOS] e2fsck with millions of files

On Tue, Aug 31, 2010 at 8:49 AM, Brent L. Bates blba...@vigyan.com wrote:
     Use the XFS file system and never have to worry about fsck again.  You'll
 have a fast, more reliable, and more robust file system with over a decade and
 exabytes of use under its belt that you will never have to wait for fsck
 again.

When this server gets rebuilt this is probably the path we will take.
Thanks for the tip.
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Re: [CentOS] e2fsck with millions of files

 To extend his comment: There is a bug in e2fsck for filesystems with
 many hardlinks.  It could take *weeks* or longer, if it finishes at all,
 to run on a large filesystem with lots of hardlinks.

 http://www.mail-archive.com/scientific-linux-us...@listserv.fnal.gov/msg02180.html

Awesome.  This happens to be our exact situation - this partition is
used for BackupPC which heavily relies on hard links.
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Re: [CentOS] e2fsck with millions of files