1.修改yum源 [root@centos]yuminstallepel-release [root@centos]sed-e's!^metalink=!metalink=!g'\ >-e's!^baseurl=!baseurl=!g'\ >-e's!https\?://download\.fedoraproject\.org/pub/epel!https://mirrors.tuna.tsinghua.edu.cn/epel!g'\ >-e's!https\?://download\.example/pub/epel!https://mirrors.tuna.tsingh...