Is there a way to unlock/logoff a user that has the computer locked without knowing their password?  The computer in question is a stand alone computer.  I know in the Windows environment that any administrator should unlock and signoff the current user.  Is the same possible under Fedora Core 4?  Also is there a way to limit when a user can be logged into a computer, for example user1 can only logon between 9AM and 3PM.