mirror.centos.org HTTP Error 404 - Not Found

에러메세지: http://mirror.centos.org/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] HTTP Error 404 - Not FoundTrying other mirror.To address this issue please refer to the below wiki articlehttps://wiki.centos.org/yum-errorsIf above article doesn't help to resolve this issue please use https://bugs.centos.org/. One of the configured repositories failed (CentOS 7 - BaseOS), and yum doesn't have en..