How to update the yum repository on Centos 5 server
1) yum install yum-fastestmirror
2) yum install yum-priorities
3) uname -i
If the output is i386 then
cd /usr/local/src
wget http://apt.sw.be/redhat/el5/en/i386/rpmforge/RPMS/rpmforge-release-0.3.6-1.el5.rf.i386.rpm
4) Install key
rpm --import http://dag.wieers.com/rpm/packages/RPM-GPG-KEY.dag.txt
5)Install rpmforge
rpm -ivh rpmforge-release-0.3.6-1.el5.rf.i386.rpm
6) yum check-update
It will take some time to update teh RPM and yum can create the file named “primary.xml.gz”
After that you can able to install any software by using yum command
for exapmle yum install mplayer* , yum install ffmpeg etc..