Hi,
From my workstation (win XP)I open a telnet session on Linux(Red Hat) server.
When I issue :
[root@server ~]# xclock
I have :
Error: Can't open display:

Then :
[root@server ~]# export DISPLAY=192.16.1.87:0.0
[root@server ~]# xclock
Error: Can't open display: 192.16.1.87:0.0
Do you have an idea ?

Many thanks.

Hi,
Well a xserver or something alike (exceed, reflection etc) must be running and accepting connection on 192.16.1.87.
Enjoy linux.

Thank you. It is runing and on the server when I type xclock the clock appears on monitor. How to make server accept connection on 192.16.1.87 ?
Regards.

Do you know how to stop restart my GNOME Display Manager (GDM) ?

Thank you.

If connecting by telnet you need to set DISPLAY on remote machine and allow it to connect to your local machine by issuing
xhost _addr_
on local machine.
Of course local XServer should listen on port 6000 (i.e. not be started with '-nolisten') and both firewalls [if any] should be suitable configured.

Try also modern way with "ssh -X" -- on Win machines "plink" is equivalent.

Regards,

Also,

run

1. Cygwin's XWin on your client
2. run putty or plink to provide a tunnel for X
3. run "Xnest :1 -query localhost" on remote machine in ssh session

local machine ? Is it my PC, my workstation ? Then where to issue
xhost 192.16.1.87:0.0 ? In a cmd box ?
Thank you.