yum安装epel-release后yum安装软件报错
Cannot retrieve metalink for repository: epel/x86_64. Please verify its path and try again
原因是epel仓库默认使用https
解决方法：
改epel文件，将https改为http
sed -i 's#https://#http://#g' /etc/yum.repos.d/epel*repo