red-hat 使用yum源方法

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

2.下载yum安装文件

注意，如果下载时找不到文件，就登录到：http://mirrors.163.com/centos/$release/os/x86_64/ 上查找相应的文件。然后再下载。

wget http://mirrors.163.com/centos/$release/os/x86_64/Packages/yum-**.centos.noarch.rpm 
wget http://mirrors.163.com/centos/$release/os/x86_64/Packages/yum-metadata-parser**.rpm
wget http://mirrors.163.com/centos/$release/os/x86_64/Packages/yum-plugin-fastestmirror**.rpm
wget http://mirrors.163.com/centos/$release/os/x86_64/Packages/python-iniparse**.rpm

3.进行安装yum 

rpm -ivh python-iniparse**noarch.rpm 
rpm -ivh yum-metadata-parser**.x86_64.rpm 
rpm -ivh yum-**.el6.centos.noarch.rpm um-plugin-fastestmirror-**.noarch.rpm  

注意最后两个包必需同时安装，否则会相互依赖

4.将准备好的repo文件放到/etc/yum.repos.d下，备份原有源

yum clean all && yum makecache