1、检查是否安装了yum包 # rpm -qa |grep yum

2、卸载RedHat自带的yum  # rpm -qa | grep yum | xargs rpm -e --nodeps  

   注：a) xargs是一条Unix和类Unix操作系统的常用命令。它的作用是将参数列表转换成小块分段传递给 其他命令，以避免参数列表过长的问题

       b) --nodeps  强制卸载,不管依赖性

3、到http://mirrors.163.com/centos中使用命令下载软件包  

 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-3.2.29-40.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  

[注]：本文示例为linux 6.4 x86_64位版本，若是32位的即x86的则将上述路径中”x86_64”改成i386，若为6.5版的可以直接将上面的6改成6.5，软件包不一定要最新的，一般来说6.4与6.5的软件包是通用的，本人没有测试过，若遇到改成6.5无法下载可以尝试直接按照上述路径下载

如以上链接无法直接下载请进百度网盘下载直接copy进去，但是请注意权限设置，下载地址如下：http://pan.baidu.com/s/1eQwfAtO

4、安装下载的centos的yum包：  

 # 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-3.2.29-40.el6.centos.noarch.rpm yum-plugin-fastestmirror-1.1.30-14.el6.noarch.rpm   

[注] :最后2个需要一起安装，否则会出现依赖性错误  

5、下载CentOS6-Base-163.repo文件，存放到 /etc/yum.repo.d中

  wget http://mirrors.163.com/.help/CentOS6-Base-163.repo  

6、编辑CentOS6-Base-163.repo文件，将其中的$releasever更改为centos的版本号，  6.4版的则改成6，若是6.5版的则改成6.5，见下面红色标出的数字 # vim CentOS6-Base-163.repo

下面是修改好的，可直接复制进去：  

# CentOS-Base.repo  

# The mirror system uses the connecting IP address of the client and the

# update status of each mirror to pick mirrors that are updated to and

# geographically close to the client.  You should use this for CentOS updates

# unless you are manually picking other mirrors.  

# If the mirrorlist= does not work for you, as a fall back you can try the

 

# remarked out baseurl= line instead.

#

[base]  

name=CentOS-6 - Base - 163.com  

baseurl=http://mirrors.163.com/centos/6/os/$basearch/  #mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=os

gpgcheck=1  

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6  

#released updates

[updates]  

name=CentOS-6 - Updates - 163.com  

baseurl=http://mirrors.163.com/centos/6/updates/$basearch/  #mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=updates

gpgcheck=1  

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6  

#additional packages that may be useful

[extras]  

name=CentOS-6 - Extras - 163.com  

baseurl=http://mirrors.163.com/centos/6/extras/$basearch/  #mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=extras

gpgcheck=1  

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6  

#additional packages that extend functionality of existing packages

[centosplus]

name=CentOS-6 - Plus - 163.com  

baseurl=http://mirrors.163.com/centos/6/centosplus/$basearch/  #mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=centosplus

gpgcheck=1

enabled=0  

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6  

#contrib - packages by Centos Users

[contrib]  

name=CentOS-6 - Contrib - 163.com  

baseurl=http://mirrors.163.com/centos/6/contrib/$basearch/  #mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=contrib

gpgcheck=1

enabled=0  

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6    

7、# yum clean all 清除原有缓存

8、# yum makecache  

  获取yum列表：  出现右侧提示表示yum更改完成：Metadata Cache Created