Install EPEL repo on Centos
EPEL are Extra Packages for Enterprise Linux.
For EPEL 6 and 7, just execute
yum install epel-release
EPEL 4 and 5 are no longer supported.
An important step after installing the epel repo is to install YUM-Priorities. Do this step before installing any other packages.
yum install yum-priorities -y
Afterwards check if they are really enabled
vi /etc/yum/pluginconf.d/priorities.conf
[main] enabled = 1
Then take a look at CentOS-Base.repo
vi /etc/yum.repos.d/CentOS-Base.repo
and give the sources [base], [updates] and [extras] a priority of 1 and [centosplus] and [contrib] a priority of 2.
Finally open
vi /etc/yum.repos.d/epel.repo
and give the sources a priority of 10
Gratz! You have succesfully installed the EPEL repo.
yum update
yum list | grep epel