【转】更改CentOS7-默认yum镜像源为国内的yum镜像源

网易：http://mirrors.163.com.centos/   

阿里云：http://mirros.aliyun.com/centos

 

修改CentOS默认yum源为mirrors.163.com

1、备份系统自带的yum镜像源 /etc/yum.repos.d/CentOS-Base.repo 

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

2、查看自己按照的centOS系统的版本

[root@betty ~]# cat /etc/system-release

3、根据系统版本号，下载对应yum源配置文件到上面那个文件夹内

进入到yum源配置文件所在的文件夹

[root@betty ~]# cd /etc/yum.repos.d/

CentOS7

[root@betty yum.repos.d]# wget http://mirrors.163.com/.help/CentOS7-Base-163.repo

CentOS6

[root@betty yum.repos.d]# wget http://mirrors.163.com/.help/CentOS6-Base-163.repo

CentOS5

[root@betty yum.repos.d]# wget http://mirrors.163.com/.help/CentOS5-Base-163.repo

4、运行yum生成缓存

[root@betty yum.repos.d]# yum makecache

5、更新系统就能看到mirrors.163.com信息

[root@betty yum.repos.d]# yum -y update

Loaded plugins: fastestmirror, refresh-packagekit, security

Setting up Update Process

Repository base is listed more than once in the configuration

Repository updates is listed more than once in the configuration

Repository extras is listed more than once in the configuration

Repository centosplus is listed more than once in the configuration

Repository contrib is listed more than once in the configuration

Loading mirror speeds from cached hostfile

* base: mirrors.163.com

* extras: mirrors.163.com

* updates: mirrors.163.com

用阿里云，只要下载aliyun的yum配置文件到/etc/yum.repos.d/，其它步骤一致

CentOS7

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

CentOS6

[root@betty yum.repos.d]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo

CentOS5

[root@betty yum.repos.d]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-5.repo