Install EL and EPEL repositories for CentOS 7

# EL REPO REPOSITORY
rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm

# EPEL REPOSITORY
wget http://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-2.noarch.rpm
rpm -Uvh epel-release-7*.rpm
rm -rf epel-release-7-2.noarch.rpm