1。安装wgettypewget#如果找不到wget命令，需要先安装yum-yinstallwget2。备份mv/etc/yum.repos.d/CentOS-Base.repo/etc/yum.repos.d/CentOS-Base.repo.backup3。下载#CentOS7wget-O/etc/yum.repos.d/CentOS-Base.repohttps://mirrors.aliyun.com/repo/Centos-7.repo#CentOS8wget-O/etc/yum.repos.d/CentOS-Base.repohttps://mirrors.aliyun.com/repo/Centos-8.repo4。生成缓存#清除缓存yumcleanall#生成缓存并创建元数据yummakecache参考：https://developer.aliyun.com/...
