mv /etc/yum.repos.d/CentOS-base.repo /etc/yum.repos.d/CentOS-base.repo.backup下载新的 CentOS-base.repo 到 /etc/yum.repos.d/
# CentOS 6 wget -O /etc/yum.repos.d/CentOS-base.repo https://mirrors.aliyun.com/repo/Centos-6.repo # 或者 curl -o /etc/yum.repos.d/CentOS-base.repo https://mirrors.aliyun.com/repo/Centos-6.repo # CentOS 7 wget -O /etc/yum.repos.d/CentOS-base.repo https://mirrors.aliyun.com/repo/Centos-7.repo # 或者 curl -o /etc/yum.repos.d/CentOS-base.repo https://mirrors.aliyun.com/repo/Centos-7.repo # CentOS 8 wget -O /etc/yum.repos.d/CentOS-base.repo https://mirrors.aliyun.com/repo/Centos-8.repo # 或者 curl -o /etc/yum.repos.d/CentOS-base.repo https://mirrors.aliyun.com/repo/Centos-8.repo缓存刷新
yum makecache
附：常用的开源镜像
