yum报错Error: Cannot retrieve metalink for repository: epel. Please verify ...

当我们安装第三方扩展源后，yum的时候就会出现：Error: Cannot retrieve metalink for repository: epel. Please verify its path报错信息。

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Error: Cannot retrieve metalink for repository: epel. Please verify its path and try again

解决方式：

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