epel-release 6
yum install -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-6.noarch.rpm
epel-release 7
yum install -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
ius-release
yum install -y https://centos7.iuscommunity.org/ius-release.rpm
更新yum
yum update