Editing sudoers file to restrict a user's commands

Posted by devin on Server Fault See other posts from Server Fault or by devin
Published on 2009-07-07T02:30:11Z Indexed on 2010/03/27 7:13 UTC
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linux

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sudo

Is it possible to edit the sudoers file so a user can use sudo for any command except for a specified one? I reverse is true, I believe, that the sudoers file can be setup so that a user can only execute a given list of commands.

EDIT: the commands I really want to take away are halt and reboot... this makes me think there are special system calls for halt and reboot. Can you take system calls away from a user? If not, is it because the unix permission system abstracts over system calls neglecting this?

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