I have a special-purpose machine, which does not have any windowing (no GUI). It has a .xinitrc -script, which starts a java-software, and keeps on running. Approx:
java -jar MyGUI.jar
while (true) {
    wait 1000
This works fine, but now the system does not answer to my ssh-calls. Usually I've just uploaded new jar-file, edited the .xinit, and reboot. Now since it is not responding, the ip perhaps is not what I think it is. So my question: how do I interrupt the script? I do have keyboard-access.