先安装那个网站的GPG
执行命令：rpm –import http://ftp.twaren.net/Linux/CentOS/RPM-GPG-KEY-CentOS-5
执行命令：vi /etc/yum.repos.d/rhel-debuginfo.repo
修改文件内容为如下内容：
[base]name=Red Hat Enterprise Linux $releasever -Basebaseurl=http://ftp.twaren.net/Linux/CentOS/5/os/$basearch/gpgcheck=1[update]name=Red Hat Enterprise Linux $releaserver -Updatesbaseurl=http://ftp.twaren.net/Linux/CentOS/5/updates/$basearch/gpgcheck=1[extras]name=Red Hat Enterprise Linux $releaserver -Extrasbaseurl=http://ftp.twaren.net/Linux/CentOS/5/extras/$basearch/gpgcheck=1[addons]name=Red Hat Enterprise Linux $releasever -Addonsbaseurl=http://ftp.twaren.net/Linux/CentOS/5/addons/$basearch/gpgcheck=1
执行命令：
yum clean all
结束！命运掌握在自己手中
