教育网用户怎么设置更新源？
用163的更新源吧：
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.old
wget http://mirrors.163.com/.help/CentOS5-Base-163.repo
mv CentOS5-Base-163.repo /etc/yum.repos.d/CentOS5-Base-163.repo
用了163更新源，yum install时出现“G......