Redhat6安装CentOS的yum

引言：由于RHEL的yum在线更新是收费的，如果没有注册的话是不能使用的，即不能在线安装软件。在这种情况下，想使用RHEL系统，还想用yum源来在线安装软件，有没有办法？我们可以删除redhat自带的yum，然后安装centOS的。

1.删除redhat原有的yum

rpm -aq|grep yum|xargs rpm -e --nodeps  #删除

2.下载新的yum安装包。

这里我们使用的是网易提供的。

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

到上述网址下载以下四个包（后期版本号可能会更新）

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

yum-metadata-parser-1.1.2-14.1.el6.i686.rpm

yum-3.2.27-14.el6.centos.noarch.rpm 

yum-plugin-fastestmirror-1.1.26-11.el6.noarch.rpm

3、安装yum软件包
rpm -ivh  python-iniparse-0.3.1-2.1.el6.noarch.rpm
rpm -ivh  yum-metadata-parser-1.1.2-14.1.el6.i686.rpm
rpm -ivh  yum-3.2.27-14.el6.centos.noarch.rpm   yum-plugin-fastestmirror-1.1.26-11.el6.noarch.rpm

注意：最后两个安装包是放在一起同时安装的，否则会提示相互依赖，安装失败。

4、更改yum源  

   #我们使用网易的CentOS镜像源
   cd  /etc/yum.repos.d/
   wget  http://mirrors.163.com/.help/CentOS6-Base-163.repo
   vi CentOS6-Base-163.repo  #编辑文件
   把文件里面的$releasever全部替换为版本号，即6 最后保存！
   或者直接把下面的内存拷贝到CentOS6-Base-163.repo文件中即可（已经修改好）

# 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.combaseurl=http://mirrors.163.com/centos/6/os/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=osgpgcheck=1gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6#released updates[updates]name=CentOS-6 - Updates - 163.combaseurl=http://mirrors.163.com/centos/6/updates/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=updatesgpgcheck=1gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6#additional packages that may be useful[extras]name=CentOS-6 - Extras - 163.combaseurl=http://mirrors.163.com/centos/6/extras/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=extrasgpgcheck=1gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6#additional packages that extend functionality of existing packages[centosplus]name=CentOS-6 - Plus - 163.combaseurl=http://mirrors.163.com/centos/6/centosplus/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=centosplusgpgcheck=1enabled=0gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6#contrib - packages by Centos Users[contrib]name=CentOS-6 - Contrib - 163.combaseurl=http://mirrors.163.com/centos/6/contrib/$basearch/#mirrorlist=http://mirrorlist.centos.org/?release=6&arch=$basearch&repo=contribgpgcheck=1enabled=0gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

5、更新

             yum clean all  #清理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
          yum update     #更新系统

          yum install vim*  #测试yum是否可用

 
至此，Redhat6可以使用CentOS的yum源在线安装软件了！