However, from what I read in the man pages, ssh -X hostname ought to
be all that is necessary. Remote display between Macs and linux
hasn't been working for me for a while either (it works with local
Suns). I don't know whether this is due to something Apple has done
or something I had done - I had figured the latter, since it works
with the Suns. But I can't open an X window from my G5 to my laptop
either. I get an "Error: Can't open display xxx.xxx.xxx.xxx:0"
That sounds like you might be picking up a DISPLAY value from a
login/rc file. Normally the DISPLAY set by SSH is of the form
"localhost:##" where the ## is a number greater than 10 (this depends
on how many other users are connected to the remote system with X
forwarding - we have some boxes with 30-40 simultaneous X sessions).
You might try a quick grep DISPLAY ~/.* to see if anything is
overwriting the value set by SSH. The scripts which we use do something
like this:
if [ -z "$DISPLAY" ]; then
DISPLAY=...
fi
Failing that I'd check the following things:
1) "ForwardX11 yes" is present in /etc/sshd_config or
/etc/ssh/sshd_config
2) ForwardX11 no isn't in ~/.ssh/config
3) DISPLAY is set before you run SSH
4) The local DISPLAY is working - e.g. run xdpyinfo and make sure it
works before getting another system involved
5) SSH doesn't throw any warnings about the remote system's host-key -
OpenSSH will disable X11 and ssh-agent forwarding in this case no
matter what you specified on the command-line.
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