Re: $DISPLAY variable empty after SSHing

[Huang Bambo <bambo dot huang at gmail dot com>]

You must have you ssh tool make X forward enabled.

2009/8/4 mcoughlin <michael.w.coughlin@gmail.com>:
>
> This may be confusing because I have to SSH twice to reach the computer I
> work on.
>
> On my home computer, I begin by starting the X server. I run the command:
>
> bash-3.2$ echo $DISPLAY
> :0.0
>
> And so it seems to be working fine. I then do:
>
> ssh -X computer #2
>
> Warning: untrusted X11 forwarding setup failed: xauth key data not generated
> Warning: No xauth data; using fake authentication data for X11 forwarding.
>
> And that is returned.
>
> ssh -Y computer #2 returns no errors.
>
> When I do
> [mcoughlin@lisa ~]$ echo $DISPLAY
> localhost:12.0
> is returned for logging in with either the -X or -Y method.
>
> When I finally log into my work computer with either the -X or -Y method,
> -bash-3.2$ echo $DISPLAY
>
> returns nothing. And so when I attempt to use octave to plot,
> octave:2> plot(x)
>
> gnuplot: unable to open display ''
> gnuplot: X11 aborted.
>
> Obviously nothing happens.
>
> Can someone give me a clue?
>
> Thank you,
> Michael
>
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