查看系统版本号
cat /etc/redhat-release
cd /etc/yum.repos.d/
rm -rf ./.
获取相应版本的阿里
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-8.repo
yum clean all
yum makecache
标签：repos,repo,etc,YUM,yum,ISO,CentOS8 From： https://www.cnblogs.com/littlewrong/p/16834614.html