vim /etc/yum.repos.d/epel.repo
1 [epel] 2 name=Extra Packages for Enterprise Linux 7 - $basearch 3 #baseurl=http://download.fedoraproject.org/pub/epel/7/$basearch 4 metalink=https://mirrors.fedoraproject.org/metalink?repo=epel-7&arch=$basearch
取消第三行注釋，並注釋第四行
1 [epel] 2 name=Extra Packages for Enterprise Linux 7 - $basearch 3 baseurl=http://download.fedoraproject.org/pub/epel/7/$basearch 4 #metalink=https://mirrors.fedoraproject.org/metalink?repo=epel-7&arch=$basearch