install elrepo repo centos 7 code example
Example: enable epel repo centos 7
cd /tmp
wget https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
ls *.rpm
cd /tmp
wget https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
ls *.rpm