163的yum源：
wget http://mirrors.163.com/.help/CentOS-Base-163.repo
進入yum 配置文件
[rhel-debuginfo]
name=Red Hat Enterprise Linux $releasever - $basearch - Debug
baseurl=http://mirrors.163.com/centos/$releasever/addons/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5