If you're using xdm, it is quite easy to add buttons to the login screen to enable the machine to be rebooted or shut down - a sample Tk script was posted to the list earlier this year, and we are currently using a modified version here. I can post more details if there is any interest...
Kevin Dr Kevin Scott Cordless Communications Group Philips Research Laboratories Tel: +44 1293 815281 Cross Oak Lane, Redhill Fax: +44 1293 815500 Surrey RH1 5HA, UK E-mail: [EMAIL PROTECTED]