history -c

Click to continue →

The server path to date can very for different servers, you will need to run this command to find it:
which date
For most servers it is:
/bin/date
This is the same for perl and php

Click to continue →

There is a bug with the new option in Centos 5 called setroubleshoot.
The bug spins the program over and over causing high memory and sometimes CPU use. Unfortunately there is no permanent fix yet, but if you see something like this high in your daily process log:
/usr/bin/python -E /usr/sbin/setroubleshootd
To fix for now you simply have [...]

Click to continue →

Kernal version
uname -a
Nic / Lan driver version
dmesg | grep r8169
Internet controller
lspci -nn | grep Ethernet
Details on etho nic card
sudo ethtool eth0
Module size
lsmod | grep r8169
Module versions
cat /proc/modules | grep r8169
Don’t worry all these commands are safe and just for reporting.

Click to continue →

You could also use find and sed, but I find that this little line of perl works nicely.
perl -pi -w -e ’s/search/replace/g;’ *.php
-e means execute the following line of code.
-i means edit in-place
-w write warnings
-p loop
Example I had the following style sheet in a section:
<link rel=”stylesheet” type=”text/css” href=”../includes/style.css”>
and I wanted the following instead:
<link rel=”stylesheet” type=”text/css” [...]

Click to continue →

This usually means you need to upgrade Perl on the server. Here is a example of a md5sum error.
The remote server didn’t report a correct md5sum of the archive. Please ensure you selected the correct type of remote server.
To fix upgrade Perl as shown here:
http://www.ezlinuxadmin.com/2009/08/upgrading-perl-on-cpanel/

Click to continue →

rsync -vae ssh 12.123.123.123:/home/dwhsbackup/daily/username/ /backup/cpbackup/daily2/username/ –bwlimit=10000 –exclude-from ‘/root/exclude.txt’

Click to continue →

The trick is to limit I/O bandwidth for rsync.
The –bwlimit option limit I/O bandwidth. You need to set bandwidth using KBytes per second. For example, limit I/O bandwidth to 10000KB/s (9.7MB/s), enter:
rsync –delete –numeric-ids –relative –delete-excluded –bwlimit=10000 /path/to/source /path/to/dest/?
10 megs a second is plenty of speed and will keep the server running smoothly when your [...]

Click to continue →

Today I was transferring files through rsync it was taking forever, my guess was the new server or old server was out of memory so I killed some procs and even rebooting the server but still it was crawling. So I thought I would think out of the box and after a couple trial and [...]

Click to continue →

First move the domlogs folder to the backup partition:
mv /usr/local/apache/domlogs /backup
Then create a symbolic link to it:
ln -s /backup/domlogs /usr/local/apache/domlogs

Click to continue →