一、 删除Redhat 自带的yum 

// root 用户执行

rpm -aq|grep yum|xargs rpm -e --nodeps   

二 、下载CentOS 的 yum 安装文件 

wget http://mirrors.163.com/centos/6/os/x86_64/Packages/python-iniparse-0.3.1-2.1.el6.noarch.rpm 
wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-metadata-parser-1.1.2-16.el6.x86_64.rpm 
wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-3.2.29-40.el6.centos.noarch.rpm 
wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.30-14.el6.noarch.rpm

三、安装yum

rpm -ivh python-iniparse-0.3.1-2.1.el6.noarch.rpm 
rpm -ivh yum-metadata-parser-1.1.2-14.1.el6.x86_64.rpm 
rpm -ivh yum-3.2.27-14.el6.centos.noarch.rpm yum-plugin-fastestmirror-1.1.26-11.el6.noarch.rpm

最后两个rpm包需要同时安装

四、更新repo文件

vi /etc/yum.repos.d/rhel-debuginfo.repo

将以下内容张贴到rhel-debuginfo.repo中

[base]
name=CentOS-$releasever - Base
baseurl=http://mirrors.163.com/centos/6.0/os/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-6

#released updates
[updates]
name=CentOS-$releasever - Updates
baseurl=http://mirrors.163.com/centos/6.0/updates/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-6

#packages used/produced in the build but not released
#[addons]
#name=CentOS-$releasever - Addons
#baseurl=http://mirrors.163.com/centos/$releasever/addons/$basearch/
#gpgcheck=1
#gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-6
#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
baseurl=http://mirrors.163.com/centos/6.0/extras/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-6
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
baseurl=http://mirrors.163.com/centos/6.0/centosplus/$basearch/
gpgcheck=1
enabled=0

五、yum clean all 

六、yum install vim #测试一下可不可以用