Any user can restart

[Markus Schönhaber]

PleegWat wrote:

> I've looked around, even in the text config files for GDM, but I haven't 
> found a way to disable that button.

Set the corresponding <mumble>Command values to be empty in the custom
gdm config file (Hardy uses /etc/gdm/gdm.conf-custom), i. e. in the
"[deamon]" section add, for example,
RebootCommand=
to remove the reboot button from the login screen.
The gdm reference manual gives a quite detailed overview of the
different configuration options gdm understands:
gnome-help file://///usr/share/gnome/help/gdm/C/gdm.xml#configuration

> So I, also, would like a way to:
> 
> 1) Remove the shutdown options from the login screen
> 2) Remove the shutdown options for all but a limited set of users
> 3) Modify the shutdown button to require entering your password before 
> actually shutting down.
> 
> If I've ever got the time, I'll probably go look in the source what's 
> possible.

Just a guess, since I haven't looked into this myself: maybe, at least
on hardy, policykit might enable you to configure that. There's a
graphical app - polkit-gnome-authorization (an entry "Authorizations" in
the menu containing the system management apps should also be available)
- which lets you define policies.

Regards
  mks