1、卸载自身yum
# rpm -aq|grep yum|xargs rpm -e --nodeps
2、安装 centos 的YUM
rpm -ivh http://mirrors.163.com/centos/6.2/os/i386/Packages/python-iniparse-0.3.1-2.1.el6.noarch.rpm
rpm -ivh http://mirrors.163.com/centos/6.2/os/i386/Packages/yum-metadata-parser-1.1.2-16.el6.i686.rpm
rpm -ivh http://mirrors.163.com/centos/6.2/os/i386/Packages/yum-3.2.29-22.el6.centos.noarch.rpm http://mirrors.163.com/centos/6.2/os/i386/Packages/yum-plugin-fastestmirror-1.1.30-10.el6.noarch.rpm
注意后面两个是相互依赖的，所以要一起装
3、更新源
cd /etc/yum.repos.d/
新建个文件CentOS-Base.repo
vi CentOS-Base.repo
内容如下：
[base]
name=CentOS-6.2 - Base
baseurl=http://mirrors.163.com/centos/6.2/os/$basearch/
gpgcheck=0
gpgkey=http://mirrors.163.com/centos/6.2/os/i386/RPM-GPG-KEY-CentOS-6
#released updates
[updates]
name=CentOS-6.2 - Updates
baseurl=http://mirrors.163.com/centos/6.2/os/$basearch/
http://mirrors.163.com/centos/6.2/os/$basearch/
gpgcheck=0
gpgkey=http://mirrors.163.com/centos/6.2/os/i386/RPM-GPG-KEY-CentOS-6
#packages used/produced in the build but not released
[addons]
name=CentOS-6.2 - Addons
baseurl=http://mirrors.163.com/centos/6.2/os/$basearch/
http://mirrors.163.com/centos/6.2/os/$basearch/
gpgcheck=0
gpgkey=http://mirrors.163.com/centos/6.2/os/i386/RPM-GPG-KEY-CentOS-6
#additional packages that may be useful
[extras]
name=CentOS-6.2 - Extras
baseurl=http://mirrors.163.com/centos/6.2/os/$basearch/
http://mirrors.163.com/centos/6.2/os/$basearch/
gpgcheck=0
gpgkey=http://mirrors.163.com/centos/6.2/os/i386/RPM-GPG-KEY-CentOS-6
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-6.2 ¨C Plus
baseurl=http://mirrors.163.com/centos/6.2/os/$basearch/
http://mirrors.163.com/centos/6.2/os/$basearch/
gpgcheck=0
gpgkey=http://mirrors.163.com/centos/6.2/os/i386/RPM-GPG-KEY-CentOS-6
#contrib - packages by Centos Users
[contrib]
name=CentOS-6.2 - Contrib
baseurl=http://mirrors.163.com/centos/6.2/os/$basearch/
http://mirrors.163.com/centos/6.2/os/$basearch/
gpgcheck=0
gpgkey=http://mirrors.163.com/centos/6.2/os/i386/RPM-GPG-KEY-CentOS-6
之后就OK了
或者
重点推荐国内的centos6源
http://mirrors.163.com/centos/6/os/x86_64/
是163的，速度很快，ping的延时基本在30ms以下，完全可以用来直接装系统了，上面这个是64位的系统，
可以直接用在yum源的baseurl后面
http://mirrors.163.com/centos/6/os/i386/
这个是32位的
其他的linux系统也都有，包括
fedora debian ubuntu openSUSE FreeBSD slackware
已经很全了，国内重点推荐
不过软件比较少，比如mplayer，rar等等，都不全
下面推荐几个外网的yum源
速度比较慢，但是软件全，几乎所有用到的常用软件都可以直接yum安装
奥地利 维也纳大学FTP (支持yum install mplayer)
这几个的延时基本在400ms-800ms，有时连接比较慢，下载速度在20ks左右，可以作为补充
注：其中奥地利 维也纳大学ftp 上有mplayer ,支持yum install mplayer.现贴上我的kk.repo文档设置内容：
[Server]
name = Server
enabled = 1
gpgcheck = 0
baseurl = file:///mnt/rhel6/Server/
[163Centos6]
name = Centos6.0
enabled = 1
gpgcheck = 0
baseurl=http://mirrors.163.com/centos/6/os/i386/[163updates]
name = 163Updates
enabled = 1
gpgcheck = 0
baseurl=http://mirrors.163.com/centos/6/updates/i386/[ftp]
name = univie ftp
enabled =1
gpgcheck =0
baseurl=ftp://ftp.univie.ac.at/systems/linux/dag/redhat/el6/en/i386/dag/
每5小时更新一次
http://mirrors.163.com/.help/centos.html
yum地址2
装xen是用这个好使，
[base]
name=CentOS-5 - Base
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever5&arch=$basearch&
repo=os
#baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/
baseurl=http://ftp.sjtu.edu.cn/centos/5/os/$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=$basearch&repo=updates
baseurl=http://ftp.sjtu.edu.cn/centos/5/updates/$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=$basearch&repo=addons
baseurl=http://ftp.sjtu.edu.cn/centos/5/addons/$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=$basearch&repo=extras
baseurl=http://ftp.sjtu.edu.cn/centos/5/extras/$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=$basearch&repo=centosplus
baseurl=http://ftp.sjtu.edu.cn/centos/5/centosplus/$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=$basearch&repo=contrib
baseurl=http://ftp.sjtu.edu.cn/centos/5/contrib/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-centos5
