X11 help wanted

Yoji Atsumi yoji.atsumi at yahoo.com
Fri Jun 5 17:30:22 UTC 2009

Hi Chris,

What you suggest is an interesting option, but I can't
get it to work.  The problem is that I can't set DISPLAY
variable from that very ssh command.  So R uses the
default DISPLAY setting and the clock appears somewhere
else, not on U's screen.

I can use xhost in a more discriminating fashion (instead
of + argument) on U and then change the DISPLAY
variable from the ssh session with R and issue X command
from that session.



--- On Fri, 6/5/09, Chris Jones <jonesc at hep.phy.cam.ac.uk> wrote:

From: Chris Jones <jonesc at hep.phy.cam.ac.uk>
Subject: Re: X11 help wanted
To: "Ubuntu user technical support, not for general discussions" <ubuntu-users at lists.ubuntu.com>
Date: Friday, June 5, 2009, 9:17 AM

> Did you use ssh X forwarding? You should! 
> Something like (on U):
> % ssh -X R xclock
> will start xclock on R and forward the display to U
> With ssh -X you do not need to set a DISPLAY and need not disable X
> security with "xhost +"

In some case you need ssh -Y instead of ssh -X


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