yum install -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-6.noarch.rpm
yum install -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
yum install -y https://centos7.iuscommunity.org/ius-release.rpm
yum update
原文：https://www.cnblogs.com/kiancyc/p/12240336.html