rm -rf /etc/yum.repos.d/*二、下载新的Base源 CentOS 7
curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repoCentOS 8
curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo三、下载新的EPEL源 CentOS 7
curl -o /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repoCentOS 8
curl -o /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-archive-8.rep四、清理缓存并生成新的缓存
yum clean all yum makecache
