Cannot retrieve metalink for repository: epel.错误解决办法

yum安装ngixn时提示如下错误

[root@localhost ~]# yum install nginx
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Error: Cannot retrieve metalink for repository: epel. Please verify its path and try again

解决办法：

yum --disablerepo=epel -y update ca-certificates