CentOS 7更换镜像源 1)先安装wget[[email protected] ~]# yum install -y wget2)下载镜像源查询国内镜像源，打开 阿里镜像站 下载CentOS 7的repo文件，进行更新镜像源[[email protected] ~]# wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo或者[[email protected] ~]# curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo3)清除缓存[[email protected] ~]# yum clean all4)生成新缓存[[email protected] ~]# yum makecache5)更新yum源[[email protected] ~]# yum -y update等待更新完毕即可。