Hi,
I have two slackware 14.2 computers.
S1 is headless, ie no keyboard, mouse, display.
S2 is running KDE with a keyboard, mouse and display.
(I will use S1 and S2 to represent the host names of each computer)

I would like to ssh from S2 to S1,
then run a program, eg xclock, on S1 and have it display on S2.
Sounds simple and was easy and not a problem a few versions ago but now I can not get past the message:
Error: Can't open display: S2:0

I have tried:
S1# startkde
S2# KDE/XDM/X etc not running

S1# xhost +S2
S1# cat /etc/ssh/sshd_config | grep X11Forward
X11Forwarding yes

S1> ssh -X user@S2
or
S1> ssh -Y user@S2

-X generates:
Warning: untrusted X11 forwarding setup failed: xauth key data not generated

S2> setenv DISPLAY S1:0
S2> echo $DISPLAY
S1:0

S2> xclock
or
S2> xclock -display S1:0

Error: Can't open display: S1:0
--------------------------------

I assume someone has a web page on the internet somewhere showing how to do this but my googling has not found it!

Can someone/anyone point me in the right direction please?

If am going about this in completely the wrong way, I am open to alternatives to achieve the same result.

Thanks in Advance

If X isn't running on S1, I do not believe that you will be able to get it to work.

I have 2 14.2 machines running in the house. Both are running X. popped up an xterm on this machine.

My remote machine has X11Forwarding yes set in /etc/ssh/sshd_config

The following post may help:

http://www.linuxquestions.org/questi...7/#post5581576

I struggled with the same problem when I first starting re-using Slackware. After a long time of reading outdated information, I finally arrived at this:
https://adventuresinslackware.wordpr...-secure-shell/

You say you want to ssh from S2 to headless S1 but if I'm not mistaken what you've tried above shows you doing it in reverse, from headless S1 to S2.

All you need to do is allow X11Forwarding on S1, and then ssh with X forwarding from S2 to S1:

ssh -Y user@S1

There is no need to export a DISPLAY variable; ssh will look after that for you. Once you ssh in to S1 just run xterm or xclock and the client will be displayed on S2. X does not need to be running on S1. Needless to say it does need to be running on S2.

I stand corrected then.

X does not need even to be installed, only the app you want to run remotely with its supporting libraries.

Please correct me if I'm wrong, but dont you need the "x" package for xauth?

^ This.

If youre going for the X11 forwarding method then may not apply. However, using the "Plain Ol' Vanilla X11 Forwarding" method on http://docs.slackware.com/howtos:win...ex_linux2linux;

Machine S2 (local, not headless)Then on Machine S1 (remote, headless)Before I saw the post that gda linked to, I would get this kind of error;(Although as gezley points out, your error says S1 ... which is because you set DISPLAY or -display as the headless machine.)

Thanks guys,
I had noticed that X did not seem to listening on port 6000 using this command:
S1> netstat -an | grep -F 6000
but I didn't know how to change that, so thanks "gda"
The magic command I was missing was:

startx -- -listen tcp

After restarting KDE with the above startx command, which I have now made an alias for startx
and following my normal procedure it all works nicely.

Excellent!
I wish I had asked earlier coz I have been googling on and off for weeks with no success :=)