修改源

备份源

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

下载新源

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

生成缓存

yum makecache

参考

• http://mirrors.163.com/.help/centos.html