使用yum时报错 This system is not registered to Red Hat Subscription Management

错误原因：使用redhat的yum源是需要注册付费的。

1、卸载RedHat自带的yum包

查看已安装的yum

rpm -qa|grep yum

#卸载已安装的yum

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

#再次查看已安装的yum

rpm -qa|grep yum

2.使用国内新的centos的yum包替换redhat自带的

地址如下：
http://mirrors.163.com/centos/

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-3.2.29-81.el6.centos.noarch.rpm
wget http://mirrors.163.com/centos/6/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.30-41.el6.noarch.rpm
wget http://mirrors.163.com/centos/6/os/x86_64/Packages/python-urlgrabber-3.9.1-11.el6.noarch.rpm
wget http://mirrors.163.com/centos/6/os/x86_64/Packages/python-iniparse-0.3.1-2.1.el6.noarch.rpm

接着就是分别安装几个包：

[root@upright package]# rpm -ivh python-urlgrabber-3.9.1-11.el6.noarch.rpm
warning: python-urlgrabber-3.9.1-11.el6.noarch.rpm: Header V3 RSA/SHA1 Signature, key ID c105b9de: NOKEY
Preparing...                ########################################### [100%]
   1:python-urlgrabber      ########################################### [100%]
[root@upright package]# rpm -ivh python-iniparse-0.3.1-2.1.el6.noarch.rpm
warning: python-iniparse-0.3.1-2.1.el6.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID c105b9de: NOKEY
Preparing...                ########################################### [100%]
        package python-iniparse-0.3.1-2.1.el6.noarch is already installed
[root@upright package]# rpm -ivh yum-metadata-parser-1.1.2-16.el6.x86_64.rpm
warning: yum-metadata-parser-1.1.2-16.el6.x86_64.rpm: Header V3 RSA/SHA1 Signature, key ID c105b9de: NOKEY
Preparing...                ########################################### [100%]
   1:yum-metadata-parser    ########################################### [100%]

#这2个rpm要一起装！！！

[root@rhel-server download]#rpm -ivh yum-3.2.29-81.el6.centos.noarch.rpm yum-plugin-fastestmirror-1.1.30-40.el6.noarch.rp

当出现报错：
python-urlgrabber >= 3.9.1-10 is needed by yum-3.2.29-81.el6.centos.noarch
发现错误，python-urlgrabber版本必须大于等于3.9.1-10

查看
[root@upright package]# rpm -qa|grep python-url
python-urlgrabber-3.9.1-9.el6.noarch

卸载
[root@upright package]# rpm -e python-urlgrabber-3.9.1-9.el6.noarch
重新安装
[root@upright package]# rpm -ivh yum-plugin-fastestmirror-1.1.30-41.el6.noarch.rpm yum-3.2.29-81.el6.centos.noarch.rpm
warning: yum-plugin-fastestmirror-1.1.30-41.el6.noarch.rpm: Header V3 RSA/SHA1 Signature, key ID c105b9de: NOKEY
Preparing...                ########################################### [100%]
   1:yum                    ########################################### [ 50%]
   2:yum-plugin-fastestmirro########################################### [100%]

3.下载163的repo文件

[root@upright yum.repos.d]# wget http://mirrors.163.com/.help/CentOS6-Base-163.repo
--2019-04-10 02:24:58--  http://mirrors.163.com/.help/CentOS6-Base-163.repo
Resolving mirrors.163.com... 59.111.0.251
Connecting to mirrors.163.com|59.111.0.251|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 2006 (2.0K) [application/octet-stream]
Saving to: a€?CentOS6-Base-163.repoa€?

100%[================================================>] 2,006       --.-K/s   in 0s

2019-04-10 02:24:59 (234 MB/s) - a€?CentOS6-Base-163.repoa€? saved [2006/2006]

[root@upright yum.repos.d]# ll
total 20
drwxr-xr-x. 2 root root 4096 Apr 10 01:33 bk
-rw-r--r--. 1 root root 1856 Apr 10 02:27 CentOS6-Base-163.repo
drwxr-xr-x. 2 root root 4096 Apr 10 02:01 package
-rw-r--r--. 1 root root  358 Apr 10 02:28 redhat.repo
-rw-r--r--. 1 root root  406 Apr 10 01:46 redhat.repo.bk

替换文件中的$releasever为版本号6

[root@rhel-server yum.repos.d]# vim CentOS6-Base-163.repo
使用全文替换：
:1,$s/$releasever/6

运行以下命令生成缓存

yum clean all
yum makecache

[root@upright yum.repos.d]# yum clean all
Loaded plugins: fastestmirror, product-id, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
Cleaning repos: base extras updates
Cleaning up Everything

[root@upright yum.repos.d]# yum makecache
Loaded plugins: fastestmirror, product-id, subscription-manager

This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
Determining fastest mirrors
base                                                               | 3.7 kB     00:00     
base/group_gz                                                      | 242 kB     00:00     
base/filelists_db                                                  | 6.4 MB     00:01     
base/primary_db                                                    | 4.7 MB     00:01     
base/other_db                                                      | 2.8 MB     00:00     
extras                                                             | 3.4 kB     00:00     
extras/filelists_db                                                |  24 kB     00:00     
extras/prestodelta                                                 | 2.2 kB     00:00     
extras/primary_db                                                  |  29 kB     00:00     
extras/other_db                                                    |  14 kB     00:00     
updates                                                            | 3.4 kB     00:00     
updates/filelists_db                                               | 2.7 MB     00:01     
updates/prestodelta                                                | 138 kB     00:00     
updates/primary_db                                                 | 3.7 MB     00:00     
updates/other_db                                                   | 193 kB     00:00     
Metadata Cache Created