Centos7修改yum源为国内的yum源

修改CentOS默认yum源为mirrors.aliyun.com

1、首先备份系统自带yum源配置文件/etc/yum.repos.d/CentOS-Base.repo

[root@localhost ~]# mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

2、下载ailiyun的yum源配置文件到/etc/yum.repos.d/CentOS7

[root@localhost ~]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

3、运行yum makecache生成缓存

[root@localhost ~]# yum makecache

4、这时候再更新系统就会看到以下mirrors.aliyun.com信息

[root@localhost ~]# yum -y update 已加载插件：fastestmirror, refresh-packagekit, security 设置更新进程Loading mirror speeds from cached hostfile * base: mirrors.aliyun.com * extras: mirrors.aliyun.com * updates: mirrors.aliyun.com