CentOs yum 源配置

备份原配置文件

yum 源的配置文件在/etc/yum.repos.d下，修改CentOS-Base.repo的内容
先备份原来的配置文件

 sudo mv CentOS-Base.repo CentOS-Base.repo.backup

下载新的源配置文件

阿里云

• CentOS7

sudo wget -O CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

• CentOS6

sudo wget -O CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo

• CentOS5

sudo wget -O CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-5.repo

网易

• CentOS7

sudo wget -O CentOS-Base.repo http://mirrors.163.com/.help/CentOS7-Base-163.repo

• CentOS6

sudo wget -O CentOS-Base.repo http://mirrors.163.com/.help/CentOS6-Base-163.repo

• CentOS5

sudo wget -O CentOS-Base.repo http://mirrors.163.com/.help/CentOS5-Base-163.repo

中科大

• CentOS7

sudo wget -O CentOS-Base.repo https://lug.ustc.edu.cn/wiki/_export/code/mirrors/help/centos?codeblock=3

• CentOS6

sudo wget -O CentOS-Base.repo https://lug.ustc.edu.cn/wiki/_export/code/mirrors/help/centos?codeblock=2

• CentOS5

sudo wget -O CentOS-Base.repo https://lug.ustc.edu.cn/wiki/_export/code/mirrors/help/centos?codeblock=1

更新源数据

• 先清除原来的源数据缓存

sudo yum clean all

• 更新源数据缓存

sudo yum makecache