将CentOS的yum源更换成阿里源

因为个人需要，整理的

参考：https://blog.csdn.net/chavo0/article/details/51939362

1.备份

$ mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak

2.下载最新的CentOS-Base.repo 到 /etc/yum.repos.d/

CentOS 5

$ wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-5.repo

CentOS 6

$ wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo

CentOS 7

$ wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

系统还没下载wget可以先用电脑登陆后面的网址下载下来，然后复制代码进去

3. 运行

$ yum clean all
$ yum list