From: Carlos Sevillano (carlos_sevillano@ureach.com)
Date: Tue Apr 13 2004 - 13:04:12 EDT
Thanks to those who replied. I seem to understand the nature of
the problem and are working to implement the scripts and
suggestions:
Susan Hanna" <hanna@uwyo.edu
Pavic, Aleksander" <Aleksander.Pavic@telekom.de
>From Susan:
http://www.tldp.org/HOWTO/Remote-X-Apps-7.html
X Applications from Another User-id
>From Alek:
The Problem:
When you login you get an $DISPLAY of "localhost:10.0" or
something like that.
This is an identifier for a specific ssh tunnel.
If you do a 'su - user' then you also change the enviroment var
$DISPLAY. You have to set it to the old value, or you cannot
connect to your local x-server.
The next Problem is the X-Auth-Cookie. If you change your user
(with enviroment [su - user]) your default x-Auth will change!
There a two ways to fix this Problem:
1.) Anytime you change a user, do it WITHOUT enviroment!!!! This
will save your original $DISPLAY and X-AUTH-Cookie.
2.) If you need to change the enviroment to the new user then
write a script (place the code in .bash_profile/.profile/.kshrc)
that print you origin $DISPLAY var into a file.
Also copy your origin x-AUTH. After 'su -' or something simillar
wrap your new $DISPLAY to the old one which is saved in the
file. (try this first, if it doesn't work - continue).
- Temporary copy your origin X-Auth-Cookie to the one of the new
user. DON'T FORGET TO SAVE THE ORIGIN! And copy the origin back
on logout.
Original Posting was:
Users unable to do X11 forwarding once the switch to another
user via PPAK, su, or sudo.
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