disable shutdown/reboot in GNOME logout menu

Bryn Reeves breeves at redhat.com
Fri Aug 12 13:13:35 UTC 2005

On Thu, 2005-08-11 at 11:21 -0300, Ben Steeves wrote: 
> Any suggestions?

Hi Ben,
To be completely safe, there are a couple of things to do here. 

You need to change gdm's config to remove the menu options.
Open /etc/X11/gdm/gdm.conf in a text editor and find the [greeter]
section. Make sure there is a line like this:


This removes the shutdown/reboot options from the log-in screen and the
log-out dialog. Alternatively run gdmconfig and provide the root
password, then uncheck the 'Show action menu' option on the security

To prevent users opening a terminal and running poweroff or reboot,
delete or move these files:


If your machines use ACPI, you will also need to disable ACPI-driven
shutdowns from the power button. 

On more to go now, to prevent someone switching to a virtual console and
hitting ctrl-alt-del, we need to edit inittab. Find the line that looks
like this:

ca::ctrlaltdel:/sbin/shutdown -t3 -r now

And change it to read:

ca::ctrlaltdel:/bin/echo "ctrl-alt-delete has been disabled"

(You can use /bin/true, or /usr/bin/logger etc. here instead if you wish
- just watch out if someone tries ctrl-alt-del before /usr is mounted :)

Kind regards,

> -- 
> Ben Steeves                     _                    bcs at metacon.ca
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Bryn M. Reeves
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