Hi Jeol, > sudo -u user9-boxed -- /usr/bin/firefox %u & > > gives a "sorry, you must have a tty to run sudo" error in > /var/log/secure . So does using the firebox command. If I recall correctly, there is a line "requiretty" in the /etc/sudoers file (or can be added). The default value is true, you might try changing that to false. -- Regards, André