Quote Originally Posted by Markus
If you try to use X-apps as root you probably get:
root@mrk-fujibox:~# kedit
kedit: cannot connect to X server :0.0
There are several fixes. I usually make a .profile in roots home dir with the following content:
root@mrk-fujibox:~# cat .profile
export DISPLAY=:0.0
That's usually not enough - it won't work e.g. if you issue "su -" in a console to open a root shell. You'd have to also enter "xhost +localhost" before you do the "su -" to get permission to connect to the local X server; even better: open the root shell by "kdesu xterm" (or any other X console program); this will transfer the "magic X11 cookie" needed to connect to the X server (that is also the command that you execute, if you open a root shell from the Knoppix menu).

Thomas