<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 TRANSITIONAL//EN"> <HTML> <HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; CHARSET=UTF-8"> <META NAME="GENERATOR" CONTENT="GtkHTML/3.0.10"> </HEAD> <BODY> I was reading my "Linux Server Hacks" book and found a cool way to freeze clients using root: skill -STOP -u <username> That causes all processes that belong to the user to freeze. You can restart the user by: skill -CONT -u <username> It beats trying to run xscreensaver and remotely locking the other computers (there are easy ways to disable/defeat that... I found out pretty quickly as I battled students one day). Henry Burroughs </BODY> </HTML>