запуск x процесса от рута с другой консоли

т.е. пользователь запустил иксы
потом администратор с другой консоли посмотрел где он их запустил:
(root)/>ps gaxuwww|grep XFree86
root 19283 2.4 5.0 89964 19428 ? S 11:54 0:31 /usr/X11R6/bin/X :0 vt1

пишет:
(root)/>xterm -display :0
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified

Warning: This program is an suid-root program or is being run by the root user.
The full text of the error or warning message cannot be safely formatted
in this environment. You may get a more descriptive message by running the
program as a non-root user or by removing the suid bit on the executable.
xterm Xt error: Can't open display: %s
zsh: exit 1 xterm -display :0