进入源目录/etc/yum.repos.d 先备份文件mv CentOS-Base.repo ./CentOS-Base.repo.back mv CentOS-Media.repo ./CentOS-Media.repo.back 修改CentOS-Base.repo 文件，清空缓存，重新编译即可yum clean all yum makecache CentOS-Base.rar