X Client

There's a nice little package called sux that does the Xauthority exporting for you in a comfortable manner (only available in testing and unstable at the moment):

$ apt-cache show sux|grep Description -A 30
Description: wrapper around su which will transfer your X credentials
Sux is a wrapper around the standard su command which will transfer
your X credentials to the target user.
.
http://sourceforge.net/projects/sux/
( from http://fgouget.free.fr/sux/ )

Just do sux <user> and you'll be able to start X applications.

Snapper 06-03-2005