ter Smitten's

If you are looking for various popular packages (phpmyadmin) to install in CentOS but you do not find them in the default installed yum repositories, then you can add the Fedora EPEL (Extra Packages for Enterprise Linux) repositories.

rpm -Uvh \
http://download.fedora.redhat.com/pub/epel/5/x86_64/epel-release-5-3.noarch.rpm

yum update

References:

1. Daemon’s corner