#!/bin/bash
#
#1、删除redhat原有的yum源
rpm -qa | grep yum | xargs rpm -e --nodeps
#2、下载新的yum安装包
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-3.2.29-60.el6.centos.noarch.rpm
wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.30-30.el6.noarch.rpm
#3、安装新的yum软件包(最后两个安装包要放在一起同时安装，但要注意先后顺序，不要搞错了，否则会提示相互依赖，安装失败。)
rpm -ivh python-iniparse-0.3.1-2.1.el6.noarch.rpm
rpm -ivh yum-metadata-parser-1.1.2-16.el6.x86_64.rpm
rpm -ivh yum-3.2.29-60.el6.centos.noarch.rpm yum-plugin-fastestmirror-1.1.30-30.el6.noarch.rpm
#4、更改yum源
cd /etc/yum.repo.d/
wget http://mirrors.163.com/.help/CentOS6-Base-163.repo
sed -i 's@$releasever@6@g' /etc/yum.repo.d/CentOS6-Base-163.repo
#6、清除yum缓存，并将服务器上的软件包信息缓存到本地
yum clean all #清除yum缓存
yum makecache #将服务器上的软件包信息缓存到本地,以提高搜索安装软件的速度
