Re: Problem opening another window.

[Igor Peshansky <pechtcha at cs dot nyu dot edu>]

On Thu, 9 Mar 2006, Ming Hai Lim wrote:

> Hi all,
>
>    I'm running into some problems opening a window.  I
> startx and telnet into a Unix machine, then I issue a
> command which would generate another window.  But this
> fails.  Can someone please advise?  Below are the
> steps I take.
>
> 1) /usr/X11R6/bin/startxwin.bat - Starting on Windows
> NT/2000/XP/2003
> 2) telnet 140.87.21.10

Consider using ssh with X forwarding instead.

> 3) setenv DISPLAY 192.168.1.100:0.0 (its a csh)

Assuming for the moment that 192.168.1.100 (which is a private IP) is
reachable from 140.87.21.10 (unlikely, as you're probably doing some sort
of NAT in between), you'll need to run "xhost + 140.87.21.10" before
telnetting to allow connections from your target machine to your local X
server.  However, you're much better off with "ssh -Y", which doesn't need
any extra authorization procedures beyond ssh itself (and will even set
DISPLAY appropriately on the remote machine).

> 4) run command "ade tkvtree ." which if I'm sitting at
> the actual Unix box will pop open another window.
> 5) Get error message: couldn't connect to display
> "192.168.1.100:0.0" at
> /usr/local/nde/ade/bin/perl/cpan_modules/solaris/Tk/MainWindow.pm
> line 55.
> MainWindow->new() at
> /usr/local/nde/ade/bin/perl/TkvtreeMain.pm line 72
>
>    I've also tried setting DISPLAY to
> 127.0.0.1:0.0 but got the same error message.

Heh, here you tried to connect to the local X server on the machine you're
telnetting to.

Do try ssh.  You don't have to set the DISPLAY on the remote machine, or
run "xhost" locally -- just "ssh -Y 140.87.21.10" and then "ade tkvtree ."
(which you can also combine into one command [!]).
HTH,
	Igor
-- 
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