How do I kill a hung process?

In a terminal window, type,

xkill

Then it will ask you to click on the window you would like to choose

From any machine:

From a terminal window, type:

pkill -u your_username name_of_process

You can check if the process died, by typing:

pgrep -u your_username name_of_process

If it hasn't died, you can force it by typing:

pkill -9 -u your_username name_of_process

If you want to kill all processes owned by you, type:

pkill -u your_username