EPEL (Extra Packages for Enterprise Linux) is a great source of quality packages maintained by fedora project community. CentOs or RHEL doesn’t support these packages.
These packages provide many popular piece of software such as wine, PhpMyAdmin, MySql and many more.
How to Install EPEL Repot on CentOs-7/RHEL7.
Step-1 Download Required RPM.
Make directory named ‘download’
Download the RPM file of EPEL Repo.
Step-2 Install the downloaded RPM
Step-3 Enable EPEL Repository.
Change Enabled 0 to 1
name=Extra Packages for Enterprise Linux 7 -- $basearch
Save & Exit
Step-4 Update yum list