1.删除redhat原有的yum 
rpm -aq|grep yum|xargs rpm -e --nodeps 

2.下载yum安装文件

wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-[3.2.27-14.el6].centos.noarch.rpm 
wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-metadata-parser-[1.1.2-14.1.el6.x86_64].rpm 
wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-plugin-fastestmirror-[1.1.26-11.el6].noarch.rpm 
wget http://mirrors.163.com/centos/6/os/x86_64/Packages/python-iniparse-[0.3.1-2.1.el6].noarch.rpm 

3.进行安装yum 

rpm -ivh --nodeps python-iniparse-[0.3.1-2.1.el6].noarch.rpm 
rpm -ivh --nodeps yum-metadata-parser-[1.1.2-14.1.el6.x86_64].rpm 
rpm -ivh --nodeps yum-[3.2.27-14.el6].centos.noarch.rpm

rpm -ivh --nodeps yum-plugin-fastestmirror-[1.1.26-11.el6].noarch.rpm

#注：【】表示变化内容，具体版本根据镜像源内容进行替换

4.更新repo文件

mv /etc/yum.repos.d/rhel-source.repo   /etc/yum.repos.d/rhel-source.repo.bak

vi /etc/yum.repos.d/CentOS-Base.repo

内容为：

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

#released updates
[updates]
name=CentOS-$releasever - Updates
baseurl=http://mirrors.163.com/centos/6/updates/$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/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/centosplus/$basearch/
gpgcheck=1
enabled=0

5.

yum clean all

yum install vim #测试一下可不可以用

---------------------------------------------------------

安装EPEL源 

1.https://fedoraproject.org/wiki/EPEL/zh-cn


进去之后下载epel-release-6-8.noarch


wKiom1dvSLnhAw3eAAA7xSiWNCU740.png-wh_50

2.安装epel

 rpm -ivh epel-release-6-8.noarch.rpm 


3.执行  yum clean all  清理yum缓存


4. 执行       yum repolist


wKioL1dvTRyyTToNAAA3OwMFyVc285.png-wh_50


上面可以看到EPEL源已经成功添加到源列表中去了，并且显示已经提供了上万个软件包！  


如果出现这样的错误：

Error: Cannot retrieve metalink for repository: epel. Please verify its path and try again

编辑：vi /etc/yum.repos.d/epel.repo  将baseurl启用，mirrorlist注释


如下：

    baseurl=http://download.fedoraproject.org/pub/epel/6/$basearch

    #mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-6&arch=$basearch


再执行       yum repolist     

                    

                                    …… OK!……