16:12:46 EST 2009 i686 i686 i386 GNU/Linux
[r...@server ~]# cat /etc/redhat-release
CentOS release 4.8 (Final)
[r...@server ~]# e2fsck -V
e2fsck 1.35 (28-Feb-2004)
Using EXT2FS Library version 1.35, 28-Feb-2004
How slow would this be with ~500K files?
Matt
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re RAID 1 array of two
drives in a similiar way? If so what not too expensive 2 port
hardware raid controller do you reccommend and how do you do it?
Thanks.
Matt
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27;s exactly the same size or bigger.
Would going from a single 500G sata to two 500G sata drives in
hardware raid 1 work? Just wandering if some space will be lost using
raid 1?
Matt
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Is there a way to tell rm -f to only remove a file if its owned by say mail?
Matt
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What does 6 bring with it? Anything new in virtualization and cloud computing?
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Have a CentOS 4.x 32 bit server running on a single 500M SATA drive.
What is easiest way to convert too RAID 1 on it? Anyone have a link?
Would be open to hardware or software just do not want to reinstall
the entire mess.
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I have the CentOS 5.5 install DVD and trying to install with software
RAID1 on two 2TB SATA drives. The CentOS install only sees one drive.
This is a Supermicro motherboard with fakeraid turned off in bios.
I tried the trick like so:
dd if=/dev/zero of=/dev/sda bs=512 count=64
dd if=/dev/zero o
> I have the CentOS 5.5 install DVD and trying to install with software
> RAID1 on two 2TB SATA drives. The CentOS install only sees one drive.
> This is a Supermicro motherboard with fakeraid turned off in bios.
>
> I tried the trick like so:
>
> dd if=/dev/zero of=/dev/sda bs=512 count=64
> dd
>>> I have the CentOS 5.5 install DVD and trying to install with software
>>> RAID1 on two 2TB SATA drives. The CentOS install only sees one drive.
>>> This is a Supermicro motherboard with fakeraid turned off in bios.
>>>
>>> I tried the trick like so:
>>>
>>> dd if=/dev/zero of=/dev/sda bs=512
Does SATA Native Command Queueing and Linux software RAID1 play well
together or is it better to turn off NCQ when doing software RAID?
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I check system load like so:
[r...@server cron.daily]# w
10:07:33 up 4 days, 15:01, 2 users, load average: 4.22, 3.17, 3.09
I would like to to graph the 3.17 5 minute average with MRTG. Anyone
know of some examples of doing this?
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>> I check system load like so:
>>
>> [r...@server cron.daily]# w
>> 10:07:33 up 4 days, 15:01, 2 users, load average: 4.22, 3.17, 3.09
>>
>> I would like to to graph the 3.17 5 minute average with MRTG. Anyone
>> know of some examples of doing this?
>
> Where you should start depends on how m
> I check system load like so:
>
> [r...@server cron.daily]# w
> 10:07:33 up 4 days, 15:01, 2 users, load average: 4.22, 3.17, 3.09
>
> I would like to to graph the 3.17 5 minute average with MRTG. Anyone
> know of some examples of doing this?
Wrote this simple perl script:
#!/usr/bin/perl -w
Is ext4 stable on CentOS 5.5 64bit? I have an email server with a
great deal of disk i/o and was wandering if ext4 would be better then
ext3 for it?
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> Cacti is in the epel repository, so if you have that configured it is
> just 'yum install cacti' and you are pretty much done.
This box is CentOS 4 and has some web hosting software on it. Due to
exclusions its not that easy. ;-(
I manged to make this work with just plain MRTG which was on it
Running yum update on CentOS 4.8 32 bit I keep getting this:
--> Running transaction check
--> Processing Dependency: perl(Compress::Raw::Zlib) = 2.024 for
package: perl-IO-Compress
--> Finished Dependency Resolution
Error: Missing Dependency: perl(Compress::Raw::Zlib) = 2.024 is needed
by package
>> Running yum update on CentOS 4.8 32 bit I keep getting this:
>>
>> --> Running transaction check
>> --> Processing Dependency: perl(Compress::Raw::Zlib) = 2.024 for
>> package: perl-IO-Compress
>> --> Finished Dependency Resolution
>> Error: Missing Dependency: perl(Compress::Raw::Zlib) = 2.024
> Hi all,
>
> Installing 5.5 on a fresh system having an Intel RAID.
>
> My 2 drives are configured as a mirror within the Intel BIOS.
>
> When starting my install, Anaconda throws an exception.
>
> After a brief goog, I see one possible fix is - at the install prompt,
> type;
>
> linux text nodmra
> I have followed the procedure on the Centos page:
>
> http://wiki.centos.org/HowTos/CentOS5ConvertToRAID
Is there a how too for CentOS 4.x?
> My setup is slightly different. I am using two partitions, / and /home.
> I have setup swap as a file, /home/swapfile.
>
> My hard drives are 500Gig sda
>>> From what I've been able to gather from the list, as I'm not part of the
>> dev testing team; there won't be an 'alpha' or 'beta', there will just be
>> a final release 'when it's ready'. We aren't sure when that will be, but
>> it will probably be within a few weeks after CentOS 5.6 is
>
> Tha
>> I am excited about CentOS 6.x though. Aren't there supposed to be
>> some neat new features etc for virtualization and cloud computing?
>
> this could be the start of a dangerously long thread nonrelated to OP.
> Why not start a new thread with 'CentOS-6 interesting upcoming features' :)
Your
What are the significant changes from CentOS 4.8 to 4.9 on 32 bit?
Anybody take the plunge already on a production box?
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> Is there a package to do this?
>
> Normally the hardware clock is set during shutdown if one is running ntpd.
> But if a long-running server shuts down unexpectedly, this isn't done, and
> the hardware clock might be off by a lot when it comes back up. So setting
> it periodically from a cron job
When starting IPERF with "iperf -s" or "iperf -sD" it seems to stop
after client runs its first test. I would like to leave it running
for a few hours to give someone a chance to run a few tests. Is there
a way to leave it active on the server and kill it manually later?
_
I just got an inexpensive VPS too have an outside server to play/test
with. I am pinging it every 5 minutes and graphing with MRTG on
another CentOS box. This works fine to all servers but the VPS. The
first ping to the VPS is always crud and following ones are fine.
[root@ns1 scripts]# ping X
I have a script I put in /etc/cron.fiveminutes
graphs.sh
#!/bin/sh
env LANG=C mrtg
/home/admin/domains/my---server.com/public_html/traffic/load/mrtg.cfg
--logging /dev/null >/dev/null 2>&1
env LANG=C mrtg
/home/admin/domains/my---server.com/public_html/traffic/eth0/mrtg.cfg
--logging /dev/null >/
On a running 64 bit CentOS 5.6 box is it possible to convert from Ext3
to Ext4 to improve performance? Right now I can deal with a few hours
of downtime on it. This is an email server with lots of I/O due to
seek time. Software RAID1 as well. Will Ext4 offer much of an
improvement?
Been looking for a while on this before resorting to asking. I have
an .htaccess file like so.
order allow,deny
allow from x.x.x.0/24
I have this in my root html directory and it works fine. Only allows
access by the x.x.x.0/24 subnet. Thing is I have one file
~"siteinfo.html" that I want to
> And be careful to leave boot partition on ext3.
Why is that? Also, does the 5.6 install dvd offer ext4 in the
graphical install? Last time I do not think I saw it.
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Does anyone know of a howto on setting up raid1 on CentOS 5.x 64 bit?
Matt
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>> Does anyone know of a howto on setting up raid1 on CentOS 5.x 64 bit?
>
> At install-time or after the machine is already running?
I was trying at install time. Although, how difficult is it to make a
.386 CentOS 4.x box raid that currently is not
On Centos 4.x 32 I want to create like a 64Mbyte ramdisk. Is there a
problem putting 30k to 80k empty files on a ramdisk? Is there a
simple howto on creating a ramdisk that anyone knows of off the top of
there head?
Matt
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I use the following .htaccess file to restrict access to certain web
folders to only my IP pool.
Options +Indexes
order allow,deny
allow from x.x.x.
Is there anyway to allow a user right in if there in that IP pool but
require a password if there not?
Matt
>
>
> PID USER PR NI VIRT RES SHR S %CPU %MEMTIME+ COMMAND
> 23119 apache15 0 964 556 472 S 0.7 0.0 0:03.68 atack
> 23479 apache15 0 964 556 472 S 0.7 0.0 0:01.94 atack
> 22170 apache15 0 964 560 472 S 0.3 0.0 0:05.23 atack
> 22375 apache1
photos. I'm not a pro (a newbie more like it...) when
> it comes to mysql and php, so this needs to be easy to do as well, from the
> gallery standpoint.
>
> Thanks.
> --
Try this one:
Single File PHP Gallery
http://sye.dk/sfpg/
Very simple.
Matt
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Is anyone creating a cloud based on Centos yet?
Ubuntu seems to be quite active there:
http://www.ubuntu.com/products/whatisubuntu/serveredition/cloud/uec
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Any progress on this?
Matt
On Mon, Jul 20, 2009 at 6:37 AM, Tsai Li Ming wrote:
>
>
> Karanbir Singh wrote:
>> Tsai Li Ming wrote:
>>> Also, we are going to start preparing ours to work with RHEL 5.4 when it
>>> is out in the coming months. Can the community
I have always used Ubuntu for desktop linux and CentOS for servers.
Have never tried CentOS as a desktop. Perhaps I should?
Matt
On Thu, Sep 24, 2009 at 4:11 AM, Anne Wilson wrote:
> I'm thinking of giving CentOS to a non-tech user for her new desktop. He
> needs are small. S
ut CentOS is what I am used too on servers now.
Thought about loading it up on a box to just try though.
Matt
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freeBSD compare to CentOS for stabillity etc? Seems as
though CentOS has the largest market capture but I have yet to try
freeBSD. Heard that freeBSD is more unix like then linux.
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ave a few Cent OS servers and
> we're slowly migrating from Debian to CentOS for various reasons.
Just curious, why the move from Debian to CentOS?
Matt
> Since 5.3 - 5.4 is going to be my first major upgrade, I had a simple
> question. WHEN it's actually released, and things are g
ease help! im honestly desperate!!
I did something like this in past. I simply used a linux boot CD in
middle of night then used dd to copy the entire disk to new drive of
equal or greater size. Then I placed the new disk in the new server
and boot
> $700, eesh. You can get some nice Areca cards for much less than that.
What is the cheapest SATA hardware raid card I can get at newegg.com?
Seems like most turn out not to be true hardware raid that I have
found and will not run on CentOS 4.8 without a great deal of grief.
M
t with FTP access. Make sure you encrypt anything first if
needed though.
Matt
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p. You could also use a cheap web hosting
>> account with FTP access. Make sure you encrypt anything first if
>> needed though.
>>
>> Matt
>
> Matt: In many posts I've read on webhostingtalk.com the TOS of most
> web hosting providers prohibits using the w
> Hi;
> I don't want sendmail. What's a good secure email server that I can yum? I
> really only need smtp right now, but who knows what the future will bring?
> TIA,
> Suzie
http://www.exim.org/
Very configurable.
Matt
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Does anyone know of a utillity I can run on a server to periodically
ping several hosts and record the result? Does not need to be
anything fancy at all.
Matt
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I have CentOS 4.x installed on a single 500GB SATA drive. Drive is
about 10 percent used. I would like to migrate to software RAID 5
without reinstalling the OS. Was thinking 3 500GB drives. Is that
possible or must I reinstall?
Matt
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I see this virtualization howto for Ubuntu
https://help.ubuntu.com/community/UEC/CDInstall
It goes into how to make your own cloud. Is there a similiar howto
anywhere for CentOS 5.4 or anything?
Matt
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http
D-1 is going to be fairly easy. Moving to RAID-5 or RAID-6
> will be a good bit trickier.
The more I hear I am thinking moving to RAID-1 would be fine. Is
there a basic howto somewhere for that?
Thanks.
Matt
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It's pretty late in the cycle to spend much time fixing a
> 4.x system.
I am thinking that way too. Even though everything is running
perfectly fine on 32bit 4.x right now moving too 64bit 5.x would be
much better. Was thinking upgrading to RAID1 would let me wait and do
that at my leis
If memory serves me correctly I was told CentOS 4.x was based on
Fedora Core 3. So when finding a rpm I always looked for one for
Fedora Core 3 and then it seemed to install ok on CentOS 4. Is CentOS
5 the same way and if so what Core is it based on?
Matt
my first
software RAID install. Built a number of Centos servers without RAID
and they have all worked fine.
Matt
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>> Does anyone have an idea what I have wrong here? This is my first
>> software RAID install. Built a number of Centos servers without RAID
>> and they have all worked fine.
>>
>
> wild guess, md is still striping. try...
I get this:
[r...@server ~]# mdadm -D /dev/md0
/dev/md0:
Versi
>> I just installed CentOS 5.4 64 bit release on a 1.9ghz CPU with 8gB of
>> RAM. It has 2 Western Digital 1.5TB SATA2 drives in RAID1.
>>
>> [r...@server ~]# df -h
>> Filesystem Size Used Avail Use% Mounted on
>> /dev/md2 1.4T 1.4G 1.3T 1% /
>> /dev/md0
there
an easy way to tell whats using all the I/O? The drive activity light
never goes off. I did a torch in my firewall router and there is no
network activity going to it.
Matt
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> Sorry about a bit offtopic, but I am looking reliable (not free)
> secondary dns provider.
Why not just rent a VPS and install CentOS and use it as your
secondary. You would have total control then and it would be cheap
and reliable.
Matt
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I have a fairly high disk i/o intensive email server I am thinking of
upgrading. I was thinking of upgrading it to CentOS 5.x 64bit. I was
also thinking of running it as a guest under XEN. Would this allow me
to more easilly transfer it to faster hardware in the future? Or
would running as a gu
Tried to run yum this morning on CentOS 5.x 64bit and ran into weird
issue this morning:
[root@server ~]# yum clean all
Loaded plugins: fastestmirror
Cleaning up Everything
Cleaning up list of fastest mirrors
[root@server ~]# yum update
Loaded plugins: fastestmirror
Determining fastest mirrors
*
I should read a bit more before I post, sorry. I did google though.
yum --disablerepo=rpmforge update
Seems to work fine. Thanks.
On Tue, Jul 26, 2011 at 12:20 PM, Matt wrote:
> Tried to run yum this morning on CentOS 5.x 64bit and ran into weird
> issue this morning:
>
>
-- ---swap-- -io --system-- cpu
r b swpd free buff cache si sobibo incs us sy id wa
0 2 0 1558496 456916 108722400 198 749 795 537 18 4 27 50
The above is when its running pretty good.
Matt
30.16 53.73
01:00:01 PM all 11.53 0.00 2.38 20.96 65.12
Average: all 17.49 0.00 4.03 46.29 32.19
A while after the reboot it straightened its self out. Yesterday "w"
was indicatining load average of like 120 or more at times. Today
after reboot all is good.
Matt
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Directadmin type server. So I really have no options on
changing services. I am running exim version 4.60 and I wander if
updating to 4.69 may help out.
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mand choke if there are too many files? I think I have
run into that before.
Matt
> umount both drives
>
> then copy mbr
>
> dd if=/dev/hdx of=/dev/hdx bs=512 count=1
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Any ideas? Thanks.
Matt
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I am coming to conclusion that CentOS 4.7 does not support the Intel
ICH9R SATA controller very well. My disk I/O is really slowing down
as well. Any solutions besides replacing motherboard to fix it?
Thanks.
Matt
> I upgraded my Centos 4.7 server last night. Switched from a cheaper
&
ter you boot.
>>native mode to serial ATA
Did that. Now it shows up as sda again. I no longer get the errors
either but I get this now.
[EMAIL PROTECTED] log]# hdparm -i /dev/sda
/dev/sda:
HDIO_GET_IDENTITY failed: Inappropriate ioctl for device
Smartd also complains on boot up.
ormal with Seagate drives
and does not mean they will fail.
I think I may be close to having most issues straightened out with
this messy upgrade. My iostats are still 3 times higher then prior to
upgrade though. Is it perhaps an issue that Centos 4.7 does not
support the Intel ICH9R SATA controll
Clamd seem to be the biggest load on this
machine. My biggest bottle neck is disk I/O anyway.
Wish I had installed CentOS 5.x 64bit way back when but some of the
software I was using at time listed support for it as beta.
Matt
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kernel-2.6.9-78.0.8.EL
[EMAIL PROTECTED] ~]#
[EMAIL PROTECTED] ~]# uname -a
Linux XXX 2.6.9-78.0.8.ELsmp #1 SMP Wed Nov 19 20:05:04 EST 2008 i686
i686 i386 GNU/Linux
Matt
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54GB
in use to a hardware RAID 1 drive of 300GB? The RAID will be two
300GB SATA drives.
Matt
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i
Mem: 8309188k total, 4761352k used, 3547836k free, 451464k buffers
Swap: 2031608k total, 192k used, 2031416k free, 1564316k cached
Matt
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4.04 60.07
dm-0 0.00 0.00 70.71 255.60 813.45 2044.82 406.73
1022.41 8.76 2.908.87 1.84 60.10
dm-1 0.00 0.00 0.00 0.000.000.00 0.00 0.00
8.00 0.00 64.20 11.38 0.00
Matt
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d having a bit of trouble figuring how to change
it under CentOS 4.
http://www.wlug.org.nz/LinuxIoScheduler
Does not seem to work on CentOS 4.
> No raid1? Besides adding redundancy, it can help with read
> performance. I would probably put the mail on a raid 10 though if I
> had 4 disks to
it's elevator= not scheduler=
Does this mean I need to add "elevator=deadline" to grub.conf? Is
there a way to make the change without rebooting?
Matt
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t0 Dec 8 17:45 iosched
-r--r--r-- 1 root root 4096 Dec 10 10:10 max_hw_sectors_kb
-rw-r--r-- 1 root root 4096 Dec 10 10:10 max_sectors_kb
-rw-r--r-- 1 root root 4096 Dec 10 10:10 nr_requests
-rw-r--r-- 1 root root 4096 Dec 10 10:10 read_ahead_kb
No go.
Matt
_
w I'm using mailertable and that appears to be working.
>
> I'm not even sure this message with get to this list. Seems like I
> haven't received any centos list mail in a while. I have on my other
> lists though.
My guess is there trying to brute force POP3 passwords so
root=/dev/VolGroup00/LogVol00
initrd /initrd-2.6.9-78.0.8.EL.img
---
I just add elevator=deadline above default or something?
Matt
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lacklisted as well. Its also good to
configure Squirrelmail not to allow them to alter the return email
address on the Squirrelmail account.
Matt
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elevator=deadline
>
> And this change will be for System Wide.
Doing this among other things helped quite a lot. My iostat -x %util
dropped from ~ 60% to ~ 22% now. Of course at same time I updated
from dual-core 2Ghz CPU to quad-core 2.4Ghz. Also swapped motherb
times to as much as 60
percent but its a rare event now. When I did a grep on a 450Mbyte
file it jumped to 90 earlier.
Matt
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> I have to build vpn server for 1500 clients. No encryption necessary.
> can anyone please recommend me vpn server.
>
> I do not have experience on vpn.
>
> I have tested openvpn on my test setup, & its working fine.
>
> I want to check if there any other vpn server available.
> I have not checked
Is it possible to tell it not to waste CPU and I/O updating
directories that contain "Maildir"? If so how?
Matt
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Is there anyway to tell with top or iostat which process is hogging
all the disk I/O?
Matt
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This finds all files modified 5 minutes ago.
find /home/*/ -cmin 5 -type f -mindepth 1 -maxdepth 1
I want to find all files modified 5 or less minutes ago. How do I do
that? "find -mtime -1" only works in 24 hour increments.
Matt
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>> find /home/*/ -cmin 5 -type f -mindepth 1 -maxdepth 1
>>
>> I want to find all files modified 5 or less minutes ago. How do I do
>> that? "find -mtime -1" only works in 24 hour increments.
>
> -cmin -5
I ca
well.
http://en.wikipedia.org/wiki/List_of_Linux_computer_viruses
Of course if you keep your passwords secure and up to date on patches
you 'should' not get any viruses on a linux box. Nothing is certain
though. Its very little effort to install clama
sure
it does not delete anything outside of /var/spool/greylist. I can add
'sudo -u' to it but then my secure log gets filled with entries but
perhaps thats the only way to do it.
Matt
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What does this error mean?
Updating : gtk2
35/178
g_module_open() failed for
/usr/lib64/gtk-2.0/2.10.0/loaders/libpixbufloader-png.so:
/usr/local/lib/libpng12.so.0: undefined symbol: inflateReset
/usr/bin/gtk-query-immodules-2.0-64: /u
>> What does this error mean?
>>
>> Updating : gtk2
When I try:
yum erase gtk2
I get:
Removing for dependencies:
ecryptfs-utils
ecryptfs-utils
trousers
trousers
Don't believe I need any of those?
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I have setup a CentOS 6.3 VPS with ONLY IPv6 access simply for testing
at this point. It browses the Internet with lynx fine on most major
sites that are IPv6 enabled. Yum does not seem to work though.
Always tries to connect to an IPv4 mirror and gives an error. Is
there a way specify an IPv6 m
>> I have setup a CentOS 6.3 VPS with ONLY IPv6 access simply for testing
>> at this point. It browses the Internet with lynx fine on most major
>> sites that are IPv6 enabled. Yum does not seem to work though.
>> Always tries to connect to an IPv4 mirror and gives an error. Is
>> there a way sp
There is a unix command called repeat.
repeat 10 some_command
Basically repeats some command ten times. Is it available on Centos 6
and what package provides it?
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> Hello Matt
> try man watch
> All the best Paul
What I am trying to do is:
http://www.redbarn.org/dns/ratelimits
repeat 10 dig @server-ip-address +short +tries=1 +time=1 your-zone.com a
Can I do that with watch?
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> repeat 10 some_command
Found this on the web somewhere:
#!/bin/sh
i=0
num=$1
shift
while [ $(( i += 1 )) -le $num ]; do
eval "$@"
done
Worked fine. Thanks.
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I have a shell script that's run every 5 minutes I use to call many
other shell scripts. Is there a way to wait a random number of
seconds before executing each line? Something like this.
wait_random 10 - 180 (perl /scripts/my_script.pl) &
wait_random 10 - 180 (perl /scripts/my_script5.pl) &
wai
I am slowly migrating the data etc off an old CentOS32 4.x server to a
new CentOS64 5.x server. The old server only has 15Gbyte of its hard
drive in use. Is there an easy/safe way to copy the entire contents
of old server root directory to a directory on the new server for
future reference? Most
>> I am slowly migrating the data etc off an old CentOS32 4.x server to a
>> new CentOS64 5.x server. The old server only has 15Gbyte of its hard
>> drive in use. Is there an easy/safe way to copy the entire contents
>> of old server root directory to a directory on the new server for
>> future r
Has anyone installed a high I/O application such as an email server on
SSD drives? Was thinking about doing two SSD's in RAID1. It would
solve my I/O latency issues but I have heard that SSD's wear out
quickly in high I/O situations? Something like each memory location
only has X many writes bef
Having troubles with perl libraries. Does everyone use yum to install
perl modules on CentOS 5.x? I have installed the rpmforge repository.
I am having terrible luck with installing libraries though. Needed
Mechanize for one script but had all sorts of conflicts. Ended up
installing mechanize
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