Hi, The "ruid" idea and prevent exec/fork of suid programs, is a nice idea but is really security through obscurity. If a hacker knows this patch is in place, he just replaces the shellcode so instead of doing: syscall exec /bin/sh it does syscall chmod 666 /etc/passwd or any other exciting piece of code you care to run. You need not launch a separate process to run it. Cheers Chris