进入/etc/yum.repo.d中

编译repo文件：vim 163.repo

[base]

name=CentOS-$releasever - Base

#mirrorlist=http://mirrors.163.com/?release=$releasever&arch=$basearch&repo=os

baseurl=http://mirrors.163.com/centos/$releasever/os/$basearch/

gpgcheck=1

gpgkey=http://mirrors.163.com/centos/devel/RPM-GPG-KEY-CentOS-5

#released updates

[update]

name=CentOS-$releasever - Updates

#mirrorlist=http://mirrors.163.com/?release=$releasever&arch=$basearch&repo=updates

baseurl=http://mirrors.163.com/centos/$releasever/updates/$basearch/

gpgcheck=1

gpgkey=http://mirrors.163.com/centos/devel/RPM-GPG-KEY-CentOS-5

#additional packages that may be useful

[extras]

name=CentOS-$releasever - Extras

#mirrorlist=http://mirrors.163.com/?release=$releasever&arch=$basearch&repo=extras

baseurl=http://mirrors.163.com/centos/$releasever/extras/$basearch/

gpgcheck=1

gpgkey=http://mirrors.163.com/centos/devel/RPM-GPG-KEY-CentOS-5

#additional packages that extend functionality of existing packages

[centosplus]

name=CentOS-$releasever - Plus

#mirrorlist=http://mirrors.163.com/?release=$releasever&arch=$basearch&repo=centosplus

baseurl=http://mirrors.163.com/centos/$releasever/centosplus/$basearch/

gpgcheck=1

enabled=1

gpgkey=http://mirrors.163.com/centos/devel/RPM-GPG-KEY-CentOS-5

#contrib - packages by Centos Users

[contrib]

name=CentOS-$releasever - Contrib

#mirrorlist=http://mirrors.163.com/?release=$releasever&arch=$basearch&repo=contrib

baseurl=http://mirrors.163.com/centos/$releasever/contrib/$basearch/

gpgcheck=1

enabled=0

gpgkey=http://mirrors.163.com/centos/devel/RPM-GPG-KEY-CentOS-5

已经更新过的可以直接使用这个命令：yum --enabled 163 check-update

第一次更新会失败，多更新几次就可以了。