NB! Please read creating a Local CentOS YUM repository on CentOS 5.x before implementing.

Adding CentOS 5.6 to the YUM repository script

Create the following additional directories for CentOS 5.6:

# mkdir -pv /var/www/html/centos/5.6/{os,updates}/{i386,x86_64}

Add the CentOS 5.6 repository to the bash script which will rsync your local YUM repository server with a CentOS 5.6 YUM mirror.

CentOS Mirror list – http://www.centos.org/modules/tinycontent/index.php?id=30

# vi yum-repo-update.sh

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#!/bin/sh
# This script will create a local CentOS mirror via Rsync
# Note: This script will download CentOS 5.6
#
 
rsync="rsync -avrt --bwlimit=256"
 
mirror=ftp.is.co.za::IS-Mirror/centos
 
verlist="5.6"
archlist="i386 x86_64"
baselist="os updates"
local=/var/www/html/centos/
 
for ver in $verlist
do
 for arch in $archlist
 do
  for base in $baselist
  do
    remote=$mirror/$ver/$base/$arch/
    $rsync $remote $local/$ver/$base/$arch/
  done
 done
done

Upgrading from CentOS 5.5

If you are already running CentOS 5.5 or an older CentOS 5 distro, all you need to do is update your machine via yum by running :

# yum update

This tutorial will guide you through installing SSMTP on CentOS 5.6

SSMTP is an extremely simple MTA to get mail off the system to a mail hub. It contains no suid-binaries or other dangerous things – no mail spool to poke around in, and no daemons running in the background. Mail is simply forwarded to the configured mailhost. Extremely easy configuration. WARNING: the above is all it does; it does not receive mail, expand aliases or manage a queue.

Firstly lets install the EPEL repository as SSMTP is not native to CentOS 5.6 base installations.

Install the EPEL i386 Repo

# rpm -Uvh http://download.fedora.redhat.com/pub/epel/5/i386/epel-release-5-4.noarch.rpm

Remove Sendmail as the binaries can conflict.

# yum remove sendmail

Now install SSMTP

# yum install ssmtp

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