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Registering a server using Red Hat Subscription Manager (RHSM)

News RHEL subscription management Recommended Books Recommended Links Migrating systems from RHN to RHNSM Registering a server using Red Hat Subscription Manager (RHSM) Redhat Networking  Unix Administration
RHEL4 registration RHEL5 registration on proxy protected network RHEL6 registration on proxy protected network  Oracle Linux Registration Xinetd How to change IP address in RHEL Humor Etc

"New" subscription system (RHSM) is slightly better then RHN for large organizations.  It allows to assign specific license to specific box and list the current status of licensing.  But like RHN it requires to use proxy setting in configuration file, it does not take them from the environment. If the company has several proxies and you have mismatch you can be royally screwed. In general you need already to check consistently of your environment with conf file settings.  The level of understanding of proxies environment by RHEL tech support is basic of worse, so they are  using the database of articles instead of actually troubleshooting based on sosreport data. Moreover each day there might a new person working on your ticket, so there no continuity. RHEL System Registration Guide ( is weak and does not cover more complex cases and typical mishaps.

NOTE: An update to subscription-manager packages and dependencies is required for Red Hat Enterprise Linux lower then 6.1 or 5.8 to register successfully. See manually updating subscription-manager before proceeding.

But there are a log of gotchas, especially if server moved from one datacenter to another in proxed environment and proxy have changed.


1. Check if /etc/rhsm/rhsm.conf contains correct entries that are the same as in /etc/yum/conf and /etc/proxy settting of env variables (if any)

2. Clean  Red Hat repositories definition in /etc/yum.repos.d directory.  I am not sure that there is a yum command for that so you need to do it manually.

3. Clean all other yum settings. From the yum manual:

The following are the ways which you can invoke yum in clean mode.

yum clean packages

Eliminate any cached packages from the system. Note that packages are not automatically deleted after they are downloaded.

yum clean headers

Eliminate all of the files which yum uses to determine the remote availability of packages. Using this option will force yum to download all the headers the next time it is run.

yum clean all

Runs yum clean packages and yum clean headers as above."

The "yum clean all" command will not only remove cached packages, but also any headers. You need flush out everything in case there are obsolete headers

# yum repolist # (or if you want to see all avalable repositories yum repolist all )

Now you can see to what repositories you are subscribed and if you wish what repositories are available for subscription.

If you are an unlucky guy who dwell behind proxy with an authoritarian firewall administrator

If you are behind proxy you need first to edit  /etc/rhsm/rhsm.conf as follows:

# an http proxy server to use (enter server FQDN)
proxy_hostname =

# port for http proxy server
proxy_port =

# user name for authenticating to an http proxy, if needed
proxy_user =

# password for basic http proxy auth, if needed
proxy_password =

IMPORTANT: while this sucker will accept the proxy in the form    this wll couse trobles with YUM.

Those giants of system programming even manage to embed proxy settings from /etc/rhsm/rhsm.conf into yum file /etc/yum.repos.d/redhat.repo, so the proxy value is taken from this file. not from  your /etc/yum.conf settings, as you would expect.  Moreover this is done without any elementary checks for consistency: if you make a pretty innocent  mistake and specify proxy setting in /etc/rhsm/rhsm.conf as


The Red Hat registration manager will accept this and will work file. But for yum to work properly /etc/rhsm/rhsm.conf proxy specification requires just DNS name without prefix http:// or https://  -- prefix https will be added blindly (and that's wrong) in redhat.repo   without checking if you specified http:// (or https://) prefix or not. This SNAFU will lead to generation in  redhat.repo  the proxy statement of the form https://

At this point you are up for a nasty surprise -- yum will not work with any Redhat repository and there is no any meaningful diagnostic messages. Looks like RHEL managers are iether engaged in binge drinking, or watch too much porn on the job ;-). 

In addition if your proxy is really restrictive, you need to submit a ticket to open  the following host names and ports on the outgoing network firewall to enable yum and subscription-manager to sync Satellite Server to Red Hat Satellite 6 repositories:

It is not recommended to specify the IP addresses because the packages are distributed through the Akamai network and the IP addresses are subject to change. However, if your firewall is unable to use host name filtering, Red Hat provides a pool of IP addresses that should provide CDN delivery.

Note: If the system is behind an HTTP proxy, recheck entries as if you make a mistake, for example in proxy_hostname firel it will be propagaded doen stream into /etc/yu,/repos.d directory and create difficult to trobleshoot error.

Add the details in /etc/rhsm/rhsm.conf as follows:

# an http proxy server to use (enter server FQDN)
proxy_hostname =

# port for http proxy server
proxy_port =

# user name for authenticating to an http proxy, if needed
proxy_user =

# password for basic http proxy auth, if needed
proxy_password =

Registering your server

To register interactively with the Red Hat Subscription Management Portal service, run:
subscription-manager register --username <username> --password <password>

To list all available subscriptions, run:

subscription-manager list --available --all 

This first task is to run subscription manager with register option, but has a caveat (see above)  if you have a proxy (see also How to access Red Hat Subscription Manager (RHSM) through a firewall or proxy - Red Hat Customer Portal

# subscription-manager register
Username: <redacted>
The system has been registered with ID: 293d8a12-15cd-43fc-be7d-447aa4999bfe

Attach  the necessary pool

Now the system registered, but with no set of repositories assigned (repository pool or simply pool). first we can see what polls are available.

# subscription-manager list --all --available

Subscription Name:   Red Hat Enterprise Linux Server, Premium (Physical or Virtual Nodes)
Provides:            Red Hat S-JIS Support (for RHEL Server) - Extended Update Support
... ... ...
Pool ID:             9c675f2bbcd54257a5950047cedfb6ee
Provides Management: No
Available:           2
Suggested:           1
Service Level:       Premium
Service Type:        L1-L3
Subscription Type:   Instance Based
Ends:                08/04/2016
System Type:         Physical 
... ... ... 

Find the pool ID for the appropriate subscription in the list, and then run the command. For example

# subscription-manager attach --pool 9c675f2bbcd54257a5950047cedfb6ee
Successfully attached a subscription for: Red Hat Enterprise Linux Server, Premium (Physical or Virtual Nodes)

You are not done yet: subscription to the necessary channels/repositories

If you previous subscription expired you will inherit repositories you used to have. But still it make sense to check the list of repositories  to which you are subscribed. It can well be empty. (see also How to add a new yum repository )

To define a new repository, you can either add   a .repo file in the /etc/yum.repos.d/ directory.  All files with the .repo  extension in this directory are read by yum.  this is a more modern way to define your repositories here instead the "old way" -- in /etc/yum.conf.

To add such a repository to your system and enable it, you need to use the command yum-config-manager as root

NOTE: If EPEL is registered on some other system, you can copy relevant files directly into /etc/yum.repos.d. See also How to Enable EPEL Repository

To add a repository you need to use the command yum-config-manager --add-repo repository_url

For example

# yum-config-manager --add-repo
Loaded plugins: langpacks, presto, refresh-packagekit
adding repo from:
grabbing file to /etc/yum.repos.d/example.repo
example.repo                                             |  413 B     00:00
repo saved to /etc/yum.repos.d/example.repo

Sometimes repositories prevent patching (this is often the  case with R RPMs installed from EPEL) you can simply disable them via command. For example:

pre>yum-config-manager --disable epel

and after patching is done re-enable it

yum-config-manager --enable  epel

You can always check the results with the command

If you got in trouble

You can try:
# subscription-manager remove –all 
# subscription-manager unregister 
# subscription-manager clean

Then do the registration again

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Old News ;-)

Register Red Hat 7 using Subscription Manager via Proxy by Grzegorz Juszczak

March 9, 2016 |

Set HTTP Proxy for Red Hat Subscription Manager

Use the following syntax:

[root@tuxfixer ~]# subscription-manager config --server.proxy_hostname=(proxy_server_ip) --server.proxy_port=(proxy_server_port)


[root@tuxfixer ~]# subscription-manager config --server.proxy_hostname= --server.proxy_port=8080

2. Register Red Hat 7 using your Red Hat credentials and automatically attach Red Hat repository

Use the following syntax:

[root@tuxfixer ~]# subscription-manager register --username (your_username) --password (your_password) --auto-attach


[root@tuxfixer ~]# subscription-manager register --username --password tuxfixer_sec_pass --auto-attach

The system has been registered with ID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx

Installed Product Current Status:
Product Name: Red Hat Enterprise Linux Server
Status:       Subscribed

3. (Optional) Enable additional Red Hat Channels to obtain additional packages

Red Hat Optional Channel:

[root@tuxfixer ~]# subscription-manager repos --enable rhel-7-server-optional-rpms

Red Hat Extras Channel:

[root@tuxfixer ~]# subscription-manager repos --enable rhel-7-server-extras-rpms

[SOLVED] Redhat Subscription Manager for RHEL 6


Good day to community,

I want to ask Redhat Subscription Manager registration.
I register one of my RHEL6 Virtual Machine registration on Redhat.

I first Used to RHN Registration,I registered and choose to RHN Classic
and prompt that the this system is registered to RHN Classic.

However,I checked the Subscription Manager and Found out this message(please see attached file).
it indicates that my machine is registered to RHN Classic but on below,
there's a question mark and unknown on the status.

Also the Products Subscription Details is not registered.

Thank you for your kindness...


As per redhat, from version 6 always use subscription-manager to register your machine.

You can do one thing, unregister your machine via rhn classic and then register it via subscription-manager.

rm /etc/sysconfig/rhn/systemid
subscription-manager register

or you can migrate to rhsm via below command

yum install subscription-manager-migration subscription-manager-migration-data
cd /etc/sysconfig/rhn
mv systemid rhnclassic.systemid
rm /etc/sysconfig/rhn/systemid
subscription-manager register


Most registration data isn't worth keeping, so I would just run '# subscription-manager register --force' and you will re-register with RHSM.


Before running force register, we need to remove the system from rhn classic, then only we would be able to add it to subscription-manager


Hi To All,

My Problem was solved!Thanks to all of you
especially to "Chetansingh" ,thank you very much for
providing this solution.

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How to register and subscribe a system to the Red Hat Customer Portal using Red Hat Subscription Management (RHSM)


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