CentOS7 修改yum源为阿里源

1、备份本地源

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1	root@localhost yum.repos.d]# cp CentOS-Base.repo  CentOS-Base_Backup.repo

　　

2、获取阿里yum官方源

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

3、更新yum缓存

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1	[root@localhost yum.repos.d]# yum makecache

4、获取阿里epel源

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1	[root@localhost yum.repos.d]# wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo

5、更新缓存

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1	[root@localhost yum.repos.d]# yum makecache

6、查看yum源

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[root@localhost yum.repos.d]# yum repolist Loaded plugins: fastestmirror 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 Loading mirror speeds from cached hostfile  * base: mirrors.aliyun.com  * extras: mirrors.aliyun.com  * updates: mirrors.aliyun.com repo id                   repo name                                                status base/7/x86_64             CentOS-7 - Base - mirrors.aliyun.com                     10,070 epel/x86_64               Extra Packages for Enterprise Linux 7 - x86_64           13,441 extras/7/x86_64           CentOS-7 - Extras - mirrors.aliyun.com                      413 updates/7/x86_64          CentOS-7 - Updates - mirrors.aliyun.com                   1,127 repolist: 25,051 You have new mail in /var/spool/mail/root