解决Redhat yum出现This system is not registered with RHN的方案

最近博主在学习Linux，菜鸟级别的的选手连装个Chrome都觉得难，悲了个催的……百度了很多教程，大多是类似的。博主的配置是在VM8下搭建的RHEL5.3 (Tikanga)版本，不知道什么原因，每次在输入yum install google-chrome-stable之后就会出现“This system is not registered with RHN”的错误提示，蛋疼不已。百度无果后，GG大神帮上忙了（搜索Redhat This system is not registered with RHN，会冒出很多国外大牛的文章）。出现这个错误的原因是你的Linux木有花钱在红帽网络上注册^^，所以无法下载谷歌Chrome的软件包，解决方案可以使用从Redhat演化而来的免费Linux版本CentOS，通过CentOS的yum更新源来实现RHEL5的YUM功能。下面博主结合GG到的国外文章谈谈How to Install CentOS YUM on Redhat Linux RHEL5，以此来解决This system is not registered with RHN的问题。

1 check what yum package installed

查看RHEL是否安装了yum，若是安装了，那么又有哪些yum包：

[root@localhost ~]# rpm -qa |grep yum

yum-metadata-parser-1.0-8.fc6

yum-3.0.1-5.el5

yum-rhn-plugin-0.4.3-1.el5

yum-updatesd-3.0.1-5.el5

2 remove all installed yum packages

卸载上面显示的所有yum包：

[root@localhost ~]# rpm -qa|grep yum|xargs rpm -e --nodeps（不检查依赖，直接删除rpm包）

再用

[root@localhost ~]# rpm -qa |grep yum

[root@localhost ~]#

查看，无信息显示表示已经卸载完成。

3 download the centos packages from website

下载 CentOS YUM包，首先我们需要找到CentOS YUM的更新源，推荐的有（前三个适用于Redhat Linux5版本，最后一个适用于RHEL6的64位版本，当然不管是RHEL5还是RHEL6等等都可以从下面四个镜像网站中下载）：

1.国外镜像源http://ftp.heanet.ie/pub/centos/5/os/i386/CentOS/

2.中国科技大学http://centos.ustc.edu.cn/centos/5/os/i386/CentOS/

3.网易开源镜像http://mirrors.163.com/centos/5/os/i386/CentOS/

4.搜狐开源镜像http://mirrors.ustc.edu.cn/centos/6/os/x86_64/Packages/

接着我们就需要在终端里面输入以下命令进行下载（以博主的RHEL5.3为例，从中国科大下载镜像，下载的目录如果没设置的话就会默认是[root@localhost ~]# pwd显示的路径）

[root@localhost ~]# wget http://centos.ustc.edu.cn/centos/5/os/i386/CentOS/yum-fastestmirror-1.1.16-21.el5.centos.noarch.rpm

[root@localhost ~]# wget http://centos.ustc.edu.cn/centos/5/os/i386/CentOS/yum-metadata-parser-1.1.2-4.el5.i386.rpm

[root@localhost ~]# wget http://centos.ustc.edu.cn/centos/5/os/i386/CentOS/yum-3.2.22-40.el5.centos.noarch.rpm

[root@localhost ~]# wget http://centos.ustc.edu.cn/centos/5/os/i386/CentOS/python-iniparse-0.2.3-6.el5.noarch.rpm

如果是Redhat 64位系统，按如下进行下载：

[root@localhost ~]# wget http://centos.ustc.edu.cn/centos/5/os/x86_64/CentOS/yum-fastestmirror-1.1.16-21.el5.centos.noarch.rpm

[root@localhost ~]# wget http://centos.ustc.edu.cn/centos/5/os/x86_64/CentOS/yum-metadata-parser-1.1.2-4.el5.x86_64.rpm

4 安装这所下载的四个包

注意:单个的安装包可能会依赖其它包（例如yum和yum-fastestmirror会相互依赖），所以我们可以把所有这些包放在一起，用一行命令将它们同时安装即可：

[root@localhost ~]# rpm -ivh yum-fastestmirror-1.1.16-21.el5.centos.noarch.rpm yum-metadata-parser-1.1.2-4.el5.i386.rpm yum-3.2.22-40.el5.centos.noarch.rpm

对应Redhat 64位系统的操作如下：

[root@localhost ~]# rpm -ivh yum-fastestmirror-1.1.16-21.el5.centos.noarch.rpm yum-metadata-parser-1.1.2-4.el5.x86_64.rpm yum-3.2.22-40.el5.centos.noarch.rpm

5 download configure file

下载CentOS-Base.repo到/etc/yum.repos.d/文件夹里： [root@localhost ~]# wget http://docs.linuxtone.org/soft/lemp/CentOS-Base.repo

-O /etc/yum.repos.d/CentOS-Base.repo

[root@localhost ~]# wget http://huangkeye-blog.googlecode.com/files/CentOS-Base.repo

-O /etc/yum.repos.d/CentOS-Base.repo（以上这两个适用于RHEL版本5）

[root@localhost ~]# wget http://my-project-huangkeye.googlecode.com/files/CentOS-Base.repo

-O /etc/yum.repos.d/CentOS-Base.repo（这个适用于RHEL版本6) 也可以直接进入vim修改该文件为以下内容：

[base]

name=CentOS-5 - Base

baseurl=http://centos.ustc.edu.cn/centos/5/os/$basearch/

gpgcheck=1

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5

#released updates

[update]

name=CentOS-5 - Updates

baseurl=http://centos.ustc.edu.cn/centos/5/updates/$basearch/

gpgcheck=1

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5

#packages used/produced in the build but not released

[addons]

name=CentOS-5 - Addons

baseurl=http://centos.ustc.edu.cn/centos/5/addons/$basearch/

gpgcheck=1

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5

#additional packages that may be useful

[extras]

也可以直接进入vim修改该文件为以下内容：

[base]

name=CentOS-5 - Base

baseurl=http://centos.ustc.edu.cn/centos/5/os/$basearch/

gpgcheck=1

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5

#released updates

[update]

name=CentOS-5 - Updates

baseurl=http://centos.ustc.edu.cn/centos/5/updates/$basearch/

gpgcheck=1

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5

#packages used/produced in the build but not released

[addons]

name=CentOS-5 - Addons

baseurl=http://centos.ustc.edu.cn/centos/5/addons/$basearch/

gpgcheck=1

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5

#additional packages that may be useful

[extras]

gpgcheck=1

enabled=0

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5

#packages in testing

[testing]

name=CentOS-5 - Testing

baseurl=http://centos.ustc.edu.cn/centos/5/testing/$basearch/

gpgcheck=1

enabled=0

gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5

6 [选做]clear cache and rebuild

需要清除和重建cache：

[root@localhost ~]# yum clean metadata

Loaded plugins: fastestmirror

0 metadata files removed

0 sqlite files removed

0 metadata files removed

[root@localhost ~]# yum clean dbcache

Loaded plugins: fastestmirror

0 sqlite files removed

[root@localhost ~]# yum makecache

Loaded plugins: fastestmirror

Determining fastest mirrors

addons                                                                                                         | 1.9 kB     00:00

addons/filelists_db                                                                                            |  568 B     00:00     addons/other_db                                                                                                |  546 B     00:00

addons/primary_db                                                                                              | 1.1 kB     00:00

base                                                                                                           | 1.1 kB     00:00

base/filelists                                                                                                 | 3.6 MB     00:03     base/other                                                                                                     |  13 MB     00:13

base/group                                                                                                     | 1.1 MB     00:02

base/primary                                                                                                   | 1.2 MB     00:01

extras                                                                                                         | 2.1 kB     00:00

extras/filelists_db                                                                                            | 241 kB     00:00

extras/other_db                                                                                                | 406 kB     00:00

extras/group                                                                                                   | 9.7 kB     00:00

extras/primary_db                                                                                              | 188 kB     00:00

update                                                                                                         | 1.9 kB     00:00     update/filelists_db                                                                                            | 3.1 MB     00:03

update/other_db                                                                                                |  15 MB     00:15

update/primary_db                                                                                              | 634 kB     00:00

base                                                                                                                        3641/3641

base                                                                                                                        3641/3641

base                                                                                                                        3641/3641

Metadata Cache Created

[root@localhost ~]#

7 installation has been completed, testing

//安装成功，开始测试：

[root@localhost ~]# yum update

出处：http://www.seacha.com/article.php/knowledge/linux/linuxbase/2013/0925/2216.html