思路：卸载Red Hat Enterprise Linux 6.4自带yum，然后下载CentOS的yum，安装后修改配置文件

1、首先到http://mirrors.163.com/centos下载软件包

x86 地址：http://mirrors.163.com/centos/6/os/i386/Packages/

x86_64 地址：http://mirrors.163.com/centos/6/os/x86_64/Packages/

必要下载的软件包有（以64位系统为例）：

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

下载命令：

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] :版本不一定要最新的

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、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

4、到http://mirrors.163.com的 centos帮助文档 中下载CentOS6-Base-163.repo文件，存放到/etc/yum.repo.d中

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

5、编辑CentOS6-Base-163.repo文件，将其中的$releasever更改为centos的版本号

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=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

6、yum clean all 清除原有缓存

7、yum makecache  获取yum列表

出现下面提示，表示yum更改完成：

Metadata Cache Created











 

Red Hat Enterprise 6.4配置CentOS 6.4软件源另一篇：

1. 用su 命令切换到root

2. 删除rhel6.4自带的yum，命令如下：
 rpm -aq|grep yum|xargs rpm -e --nodeps

3. 下载CentOS 6.4的yum，命令如下：
wget http://mirrors.163.com/centos/6.4/os/x86_64/Packages/python-iniparse-0.3.1-2.1.el6.noarch.rpm
wget http://mirrors.163.com/centos/6.4/os/x86_64/Packages/yum-3.2.29-40.el6.centos.noarch.rpm
wget http://mirrors.163.com/centos/6.4/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.30-14.el6.noarch.rpm
wget http://mirrors.163.com/centos/6.4/os/x86_64/Packages/yum-metadata-parser-1.1.2-16.el6.x86_64.rpm

4.安装yum
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

5.配置repo文件
新建CentOS-Base.repo文件，内容为：
    [base] 
    name=CentOS-6 - Base 
    repo=os 
    baseurl=http://mirrors.163.com/centos/6.4/os/$basearch/ 
    gpgcheck=1 
    gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6 
     
    #released updates 
    [update] 
    name=CentOS-6 - Updates 
    baseurl=http://mirrors.163.com/centos/6.4/updates/$basearch/ 
    gpgcheck=1 
    gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6 
     
    #packages used/produced in the build but not released 
    #[addons] 
    #name=CentOS-6 - Addons 
    #baseurl=http://mirrors.163.com/centos/6.4/addons/$basearch/ 
    #gpgcheck=1 
    #gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6 
     
    #additional packages that may be useful 
    [extras] 
    name=CentOS-6 - Extras 
    baseurl=http://mirrors.163.com/centos/6.4/extras/$basearch/ 
    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 
    baseurl=http://mirrors.163.com/centos/6.4/centosplus/$basearch/ 
    gpgcheck=1 
    enabled=1 
    gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6 
     
    #contrib - packages by Centos Users 
    [contrib] 
    name=CentOS-6 - Contrib 
    baseurl=http://mirrors.163.com/centos/6.4/contrib/$basearch/ 
    gpgcheck=1 
    enabled=0 
    gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

保存后将CentOS-Base.repo移到/etc/yum.repos.d/ 里面，命令如下：
mv ./CentOS-Base.repo  /etc/yum.repos.d/

6.清除yum缓存
clean yum all

7.试试能不能用 yum install gcc-c++-4.4.7-3.el6