如何设置CentOS 5的yum源[上海交通大学http://ftp.sjtu.edu.cn/centos/5.0/os/x86_64]

文章来源：http://blog.chinaunix.net/uid-24917554-id-1643793.html

1．修改/etc/yum.repos.d/CentOS-Base.repo为:
CentOS-Base.repo
[base] 
name=CentOS-5 - Base 
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever5&arch=$basearch& 
repo=os 
#baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/ 
baseurl=http://ftp.sjtu.edu.cn/centos/5.0/os/$basearch/ 
gpgcheck=1 
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos5

#released updates 
[update] 
name=CentOS-5 - Updates 
#mirrorlist=http://mirrorlist.centos.org/?release=4&arch=$basearch&repo=updates 
baseurl=http://ftp.sjtu.edu.cn/centos/5.0/updates/$basearch/ 
gpgcheck=1 
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos5

#packages used/produced in the build but not released 
[addons] 
name=CentOS-5 - Addons 
#mirrorlist=http://mirrorlist.centos.org/?release=4&arch=$basearch&repo=addons

baseurl=http://ftp.sjtu.edu.cn/centos/5.0/addons/$basearch/ 
gpgcheck=1 
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos5

#additional packages that may be useful 
[extras] 
name=CentOS-5 - Extras 
#mirrorlist=http://mirrorlist.centos.org/?release=4&arch=$basearch&repo=extras

baseurl=http://ftp.sjtu.edu.cn/centos/5.0/extras/$basearch/ 
gpgcheck=1 
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos5

#additional packages that extend functionality of existing packages 
[centosplus] 
name=CentOS-5 - Plus 
#mirrorlist=http://mirrorlist.centos.org/?release=4&arch=$basearch&repo=centosplus 
baseurl=http://ftp.sjtu.edu.cn/centos/5.0/centosplus/$basearch/ 
gpgcheck=1 
enabled=0 
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos5

#contrib - packages by Centos Users 
[contrib] 
name=CentOS-5 - Contrib 
#mirrorlist=http://mirrorlist.centos.org/?release=4&arch=$basearch&repo=contrib 
baseurl=http://ftp.sjtu.edu.cn/centos/5.0/contrib/$basearch/ 
gpgcheck=1 
enabled=0 
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos5

2．执行
64位：
rpm --import http://ftp.sjtu.edu.cn/centos/5.0/os/x86_64/RPM-GPG-KEY-CentOS-5

32位：
rpm --import http://ftp.sjtu.edu.cn/centos/5.0/os/i386/RPM-GPG-KEY-CentOS-5

3．执行
yum update
Ok了，搞定。