This system is not registered with an entitlement server. You can use subscription-manager to register.

系统：redhat 7.6

说明：配置yum源，提示This system is not registered with an entitlement server. You can use subscription-manager to register.

配置文件：

[root@localhost yum.repos.d]# cat redhat7.repo
[rhel-source]
name=Source
baseurl=file:///mnt
enabled=1
gpgcheck=0

yum安装测试，能够进行安装，但是系统提示没有注册

[root@localhost yum.repos.d]# yum install -y tree
Loaded plugins: product-id, search-disabled-repos, subscription-manager
This system is not registered with an entitlement server. You can use subscription-manager to register.
Resolving Dependencies
--> Running transaction check
---> Package tree.x86_64 0:1.6.0-10.el7 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

===============================================================================================================================================================================================
 Package                                  Arch                                       Version                                             Repository                                       Size
===============================================================================================================================================================================================
Installing:
 tree                                     x86_64                                     1.6.0-10.el7                                        rhel-source                                      46 k

Transaction Summary
===============================================================================================================================================================================================
Install  1 Package

Total download size: 46 k
Installed size: 87 k
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : tree-1.6.0-10.el7.x86_64                                                                                                                                                    1/1 
  Verifying  : tree-1.6.0-10.el7.x86_64                                                                                                                                                    1/1 

Installed:
  tree.x86_64 0:1.6.0-10.el7                                                                                                                                                                   

Complete!

原因：redhat自带的插件subscription-manager。这个插件的作用就是Red Hat Subscription Manager订阅管理器，就是它让你一直register

解决办法：将配置文件subscription-manager.conf中的enable注释掉

[root@localhost yum.repos.d]# vi /etc/yum/pluginconf.d/subscription-manager.conf

[main]
#enabled=1
~  

将安装的软件remove，再次进行安装实验

[root@tz-yycs-db01 ~]# yum install -y tree
Loaded plugins: product-id, search-disabled-repos
Resolving Dependencies
--> Running transaction check
---> Package tree.x86_64 0:1.6.0-10.el7 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

===============================================================================================================================================================================================
 Package                                  Arch                                       Version                                             Repository                                       Size
===============================================================================================================================================================================================
Installing:
 tree                                     x86_64                                     1.6.0-10.el7                                        rhel-source                                      46 k

Transaction Summary
===============================================================================================================================================================================================
Install  1 Package

Total download size: 46 k
Installed size: 87 k
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : tree-1.6.0-10.el7.x86_64                                                                                                                                                    1/1 
  Verifying  : tree-1.6.0-10.el7.x86_64                                                                                                                                                    1/1 

Installed:
  tree.x86_64 0:1.6.0-10.el7                                                                                                                                                                   

Complete!