Centos8 换国内阿里云源 1. 备份旧文件mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup2. 下载 CentOS-Base.repo 到 /etc/yum.repos.d/ 目录wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-8.repo3. 替换部分字段sed -i -e '/mirrors.cloud.aliyuncs.com/d' -e '/mirrors.aliyuncs.com/d' /etc/yum.repos.d/CentOS-Base.repo4. 生成缓存yum makecache