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Old 11-17-2006, 08:32 AM   #1
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Registered: Jun 2006
Location: Colorado
Distribution: suse 10.1
Posts: 2

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X11 from non-graphic shell

I picked up a book on java and am playing with it on my SuSe 10.1 environment.

When running the java bytecode I compiled with javac from an x-term spawned from the kde environment - it runs fine.

When I attempt to run the same code from a shell outside the kde environment I get the following error:

1. "mybox# java HelloJava"

Exception in thread "main" java.awt.HeadlessException:
No X11 DISPLAY variable was set, but this program performed an operation which requires it.

2. So I ran the following command from the command line
export DISPLAY=localhost:0.0

3. Run the code again. "mybox# java HelloJava"

Exception in thread "main" java.lang.InternalError: Can't connect to X11 window server using 'localhost:0.0' as the value of the DISPLAY variable.

I'm sure this is a simple configuration issue, will someone help me or direct me to the right HOWTO or tutorial.

Many Thanks in Advance


When you kick a dog around long enough,
even the most sweet tempered and patient,
eventually he will switch to linux . . . ;P

Last edited by old-dog; 11-17-2006 at 08:44 AM.
Old 11-17-2006, 09:59 AM   #2
HCL Maintainer
Registered: Jan 2006
Distribution: (H)LFS, Gentoo
Posts: 2,450

Rep: Reputation: 76
Do you have authorization to run on your x server (when you're on the console)?

To find out, go to the non-graphical console, and type
xterm -display 0:0
If you get error messages, you probably don't have authorization. If you check your screen, it should be running an xterm now.

To get authorization depends on your distro. The most basic way is use xauth and MIT-cookies to do something like
xauth add 0:0 . `mcookie`


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