[CentOS] How to restrict reboot/poweroff from non-admins?

Wed Mar 28 14:47:47 UTC 2012
Phil Schaffner <Philip.R.Schaffner at NASA.gov>

Johnny Hughes wrote on 03/28/2012 10:26 AM:
> On 03/28/2012 09:03 AM, Phil Schaffner wrote:
>> Timo Neuvonen wrote on 03/28/2012 09:17 AM:
>>> I just noticed that CentOS (6.2) by default allows any user to
>>> reboot/poweroff system without any admin rights, or without any further
>>> questions, if using commands 'reboot' or 'poweroff'. But 'shutdown' still
>>> requires admin rights.
>>> What is the preferred way to restrict any regular user from rebooting /
>>> powering off the system (by accident)?
>>> IMHO, sudo should be required for this purpose (at least in a system with
>>> shared remote access from multiple users, single-user laptops etc may be a
>>> different case)
>> OUCH! This seems to qualify as a CentOS bug.  I confirm that a normal
>> user can reboot or poweroff the system on 6.2.  On RHEL:
>> $ rpm -qa redhat-release\*
>> redhat-release-server-6Server-
>> $ poweroff
>> poweroff: Need to be root
>> $ reboot
>> reboot: Need to be root
>> Phil
> Make sure you are testing apples to apples
> Test ssh access versus local console access, etc.

Got me there.  The access mode does seem to be the difference.  I tested 
from the GUI on CentOS and via ssh on RHEL.  Logged on to the console in 
a GUI on RHEL6 a user can reboot or poweroff, and presumably also halt.  
Seems to be the "console user" thing.  So CentOS does match upstream.