[Linux] CentOS 7.7 failure: repodata/repomd.xml from centos7: [Errno 256] No more mirrors to try.
场景修改了本地yum源,yumcleanall后尝试yumupdate或者yummakecache报错,内容为:failure:repodata/repomd.xmlfromcentos7:[Errno256]Nomoremirrorstotry.解决:备份/etc/yum.repos.d下所有的镜像,新建一个CentOS-Base.repo,并且清空所有内容,添加以下内容:#geographic