解决centos7.9镜像问题
解决方案
https://wiki.bafangwy.com/doc/719/
安装chrome(https://www.cnblogs.com/zxqblogrecord/p/13171516.html)时出现以下问题:
failure: repodata/repomd.xml from centos7: [Errno 256] No more mirrors to try.
http://mirror.centos.org/centos/7/os/x86_64/repodata/repomd.xml: [Errno 14] HTTP Error 404 - Not Found