思路：解除安裝redhat自帶yum，然後下載centos的yum，安裝後修改配置檔案

1、首先到下載軟體包

x86 地址：/6/os/i386/Packages/

x86_64 地址：/6/os/x86_64/Packages/

必要下載的軟體包有（以64位系統為例）：

a python-iniparse-0.3.1-2.1.el6.noarch.rpm

b yum-3.2.29-40.el6.centos.noarch.rpm

c yum-metadata-parser-1.1.2-16.el6.x86_64.rpm

d yum-plugin-fastestmirror-1.1.30-14.el6.noarch.rpm

下載命令：

wget /6/os/x86_64/Packages/python-iniparse-0.3.1-2.1.el6.noarch.rpm

wget /6/os/x86_64/Packages/yum-metadata-parser-1.1.2-16.el6.x86_64.rpm

wget /6/os/x86_64/Packages/yum-3.2.29-40.el6.centos.noarch.rpm

wget /6/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.30-14.el6.noarch.rpm

[注] :版本不一定要最新的

2、解除安裝RedHat自帶的yum

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

注：a、xargs是一條和類Unix作業系統的常用命令。它的作用是將引數列表轉換成小塊分段傳遞給其他命令，以避免引數列表過長的問題

b、--nodeps 強制解除安裝,不管依賴性

3、安裝下載的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] :最後2個需要一起安裝，否則會出現依賴性錯誤

4、到的 centos幫助文件 中下載CentOS6-Base-163.repo檔案，存放到/etc/yum.repo.d中

wget

5、編輯CentOS6-Base-163.repo檔案，將其中的$releasever更改為centos的版本號

下面是修改好的：

# 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=/6/os/$basearch/

#mirrorlist=

gpgcheck=1

gpgkey=

#released updates

[updates]

name=CentOS-6 - Updates - 163.com

baseurl=/6/updates/$basearch/

#mirrorlist=

gpgcheck=1

gpgkey=

#additional packages that may be useful

[extras]

name=CentOS-6 - Extras - 163.com

baseurl=/6/extras/$basearch/

#mirrorlist=

gpgcheck=1

gpgkey=

#additional packages that extend functionality of existing packages

[centosplus]

name=CentOS-6 - Plus - 163.com

baseurl=/6/centosplus/$basearch/

#mirrorlist=

gpgcheck=1

enabled=0

gpgkey=

#contrib - packages by Centos Users

[contrib]

name=CentOS-6 - Contrib - 163.com

baseurl=/6/contrib/$basearch/

#mirrorlist=

gpgcheck=1

enabled=0

gpgkey=

6、yum clean all 清除原有快取

7、yum makecache 獲取yum列表

出現下面提示，表示yum更改完成：

Metadata Cache Created

http://blog.sina.com.cn/s/blog_50f908410101cto6.html

RedHat Enterprise Linux 6.4使用Centos 6 的yum源

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