You need to set a couple of values using dconf. You can find out the keys to set using:

gsettings list-schemas | grep login

This shows org.gnome.login-screen

then list the keys using
gsettings list-keys org.gnome.login-screen

you will find two keys: banner-message-text

and banner-message-enable

Setting these keys in a file named like 01-login-screen in a directory under /etc/dconf/db

(im not sure if its gdm.d or local.d), in a file like this:
[org/gnome/login-screen]

banner-message-enable=true

banner-message-text=whatever

should do it. I'm not sure if you need (or can) quote whatever, and I'm not sure which directory it must go in (we disable the login list in a file like this and I just put it in both places - I guess I had trouble with one of them and duplicated it)

good luck!

On Fri, Aug 28, 2015 at 11:51 AM, Jim Campbell <[log in to unmask]> wrote:

At the bottom of each page in the GNOME docs, there's a short blurb that says, "Got a comment? Spotted an error? Found the instructions unclear? Send feedback about this page." Sending feedback sends a message to a mailing list that is monitored by the docs team.

 

I think that the person who monitors that mailing list most regularly is also the person who works on the sysadmin guide, so submitting your feedback there would be as good as a bug report.  You can also file a bug report, too.

 

That link is present on all GNOME help docs on the web, by the way.

 

I think that SL7 is using GNOME 3.8 right now, so this is the page that you'd want to check out:

 

https://help.gnome.org/admin/system-admin-guide/3.8/login-banner.html.en

 

Jim

 

 

On Fri, Aug 28, 2015, at 01:29 PM, Pat Riehecky wrote:

Typically I find the upstream Gnome3 guide a bit more complete: https://help.gnome.org/admin/system-admin-guide/stable/index.html.en

 

I do not see a suitable setting there either.....

 

Pat

 

On 08/28/2015 01:23 PM, Nathan Moore wrote:

In older versions of SL one could include the machine name in the login banner.  Somethings like "%n.university.edu" in the login banner config screen would produce "physics1.university.edu" at the login screen.  

 

In the present RHEL7 documentation (link below) I don't see this option in the dconf docs.  Is there an easy way to include machine name in the gdm login screen?  

 

reference, https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Desktop_Migration_and_Administration_Guide/customizing-login-screen.html

 

--

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Nathan Moore

Mississippi River and 44th Parallel

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-- 
Pat Riehecky
Scientific Linux developer

Fermi National Accelerator Laboratory
www.fnal.gov www.scientificlinux.org

 

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-- greg

[log in to unmask]

Instructor, Computer Science
http://fog.ccsf.edu/~gboyd