以超级用户登路
先关闭fastestmirror
“vi /etc/yum/pluginconf.d/fastestmirror.conf” and set “enable=0″
cd /etc/yum.repos.d/
wget http://mirrors.163.com/.help/CentOS-Base-163.repo
yum makecache
yum update
now enjoy it！
原文：http://www.longtune.com/unixlinux/centos-easenet-163-yum.html