Enable EPEL Repo on CentOS 5, CentOS 6 and CentOS 7

What is the EPEL repo? The EPEL (Extra Packages for Enterprise Linux) yum repository is an excellent source for additional packages for CentOS. Instead of having to compile applications that aren't included in CentOS' built-in repositories from source, EPEL can be used. Install/enable the EPEL repo:  Disable the EPEL repo: Open /etc/yum.repos.d/epel.repo and set ...

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