I can log into the remote Ubuntu (Kubuntu 12.04) machine. Using the info from (How to start a GUI software on a remote Linux PC via SSH) I tried the following after logging in:
user@Kub:~$ export DISPLAY=:0 user@Kub:~$ firefox No protocol specified No protocol specified No protocol specified No protocol specified Error: cannot open display: :0
I expected the same success as stated at the question referenced. Unfortunately, as you see it didn't work for me. The machine has 3 displays. Could that be the issue?
Is there a simple solution? I also read (https://unix.stackexchange.com/questions/10121/open-a-window-on-a-remote-x-display-why-cannot-open-display) but I didn't understand how to use or apply that advice. It was too complicated. I appreciate any relatively simple solutions.
I looked at a running GUI process (Kate) with this:
# cat /proc/2857/environ | tr \\0 \\n | grep -E '^(DISPLAY|AUTHORITY)=' DISPLAY=:0
That further confuses me as to why this didn't work.
Using Scott Goodgame's suggestion (below), I tried this:
- login with -X and -C options on SSH.
- export DISPLAY=:0
- firefox &
The result was:
$ No protocol specified No protocol specified No protocol specified No protocol specified Error: cannot open display: :0