centOS 8 换阿里云的catch
cd /etc/yum.repos.d
rm -rf ./*
wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo
yum makecache
cd /etc/yum.repos.d
rm -rf ./*
wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo
yum makecache