一、下载阿里的镜像源
wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-8.repo
清除和创建缓存
yum clean all
yum makecache
随便安装一个组件
yum install -y yum-utils
很显然，yum源配置有问题，需要修改
vim /etc/yum.repos.d/CentOS-Base.repo
需要把mirrors.cloud.aliyuncs.com替换成mirrors.aliyun.com 把releasever替换成releasever-stream
sed -i s#mirrors.cloud.aliyuncs.com#mioors.aliyuncss.com#g /etc/yum.repos.d/CentOS-Base.repo sed -i s#releasever#releasever-stream#g /etc/yum.repos.d/CentOS-Bse.repo
清除和创建缓存
yum clean all yum makecache
OK
