[sclug] ssh -X not setting $DISPLAY

[John Stumbles]

I'm trying to do X11 forwarding from one linux box to another but it 
only works one way.

 From a console running under kde on a Debian Sarge (i86) system:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
john at shuttle:~$ echo $DISPLAY
:0
john at shuttle:~$ ssh -X targa
Linux targa 2.6.15-27-amd64-generic #1 SMP PREEMPT Fri Dec 8 17:50:54 
UTC 2006 x86_64 GNU/Linux

The programs included with the Ubuntu system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
applicable law.
Last login: Fri Jan  5 13:46:20 2007
john at targa:~$ echo $DISPLAY
localhost:10.0
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~




 From a console running under kde on a Kubuntu Dapper (AMD64) system:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
john at targa:~$ echo $DISPLAY
:0
john at targa:~$ ssh -X shuttle
Linux shuttle 2.6.8-2-386 #1 Tue Aug 16 12:46:35 UTC 2005 i686 GNU/Linux

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
You have new mail.

Last login: Fri Jan  5 13:38:16 2007 from targa
john at shuttle:~$ echo $DISPLAY

john at shuttle:~$
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


duh?

Both boxes are running OpenSSH.

man ssh says:
    X11 and TCP forwarding
      If the ForwardX11 variable is set to ``yes'' (or see the 
description of the -X and -x options described later) and the user is 
using X11 (the DISPLAY environment variable is set), the connection to 
the X11 display is automatically forwarded to the remote side in such a 
way that any X11 programs started from the shell (or command) will go 
   through the encrypted channel, and the connection to the real X 
server will be made from the local machine.  The user should not 
manually set DISPLAY.  Forwarding of X11 connections can be configured 
on the command line or in configuration files.

$DISPLAY is set (to :0) when I invoke ssh -X so it should do forwarding 
... shouldn't it?


-- 
John Stumbles