The EPEL repository contains quite a few useful packages for CentOS. Below are the steps to add this repository to your system:

wget http://mirror.pnl.gov/epel/6/x86_64/epel-release-6-8.noarch.rpm
rpm -i epel-release-6-8.noarch.rpm
rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6
0