CentOS yum 换为阿里云，163源

阿里云镜像网址
http://mirrors.aliyun.com/

更新步骤

一、备份

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

二、下载新的CentOS-Base.repo 到/etc/yum.repos.d/

阿里云yum源

• 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

163yum源

• Centos5:

wget -P /etc/yum.repos.d http://mirrors.163.com/.help/CentOS5-Base-163.repo

• Centos6:

wget -P /etc/yum.repos.d http://mirrors.163.com/.help/CentOS6-Base-163.repo

• Centos7:

wget -P /etc/yum.repos.d http://mirrors.163.com/.help/CentOS7-Base-163.repo

三、之后运行yum makecache生成缓存

yum clean all
yum makecache