root@main:~# echo $DISPLAY

root@main:~# xhost +
xhost: unable to open display ""
root@main:~#

it seems that the DISPLAY environment variable on my host PC is empty....but how come that i can still run/display X-window applications
on it??

export DISPLAY=<machine>:0.0
machine: localhost or where your display lives...

as it seems to be unset on your sys check /etc/security/pam_env.conf and set a default there or in any other environment file like profile, bashrc,...

sl mritch.

what if i don't want to do "xhost +" each time....i want to make it a default initially. then
which file should i modify??



Jimmy

rather use xauth (see "man xauth") and work aver a ssh if you use it over the net. it's far more secure.
to make it permanent anyway (better use "xhost + <machine-name>") locate your X startup script (usually .xsession in your home directory) and add a line:

xhost + <machine-name> &

if you are in some windowmanager like kde or gnome just make a small script and start it with you wm:

in an xterm do:
$ mkdir scripts; cd scripts
$ echo "#!/bin/sh" > xhost_access.sh
$ echo "xhost + <allowed_machine>" >> xhost_access.sh
$ chmod a+x xhost_access.sh

if yuo're in gnome start the gnome-control-center:
$ gnome-control-center

doubleclick comlex/advanced > sessions (or so..) > tab startprograms (..or so)
now ad the script from your /home/you/scripts/xhost_access.sh here and finito.
http://www.linuxquestions.org/questi...4&goto=newpost

in kde there sure is a quite similar way.

sl mritch.

as root:
export XAUTHORITY=/home/your_user_name/.Xauthority
reboot