To install Centos 7 EPEL repository execute:#yum install -y epel-release
or install it from rpm:#wget https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
#yum install -y epel-release-latest-7.noarch.rpm
list repos:yum repolist
Search package in the repository:yum search package_name
Get information about the package:yum info package_name
Install package:yum install package_name
List all available packages in a specific repository called repo_name (will also disable all other repositories):yum --disablerepo="*" --enablerepo="repo_name" list available
Find a specific package in a specific repository:yum --disablerepo="*" --enablerepo="repo_name" list available | grep 'package_name'
List output of packages in a specific repository:yum --disablerepo="*" --enablerepo="repo_name" list available | less