Quick Tip: Use xkill to Terminate Misbehaving Applications
Productivity Sauce
Don't you just hate it when an application stops working properly and you can't close it? Fortunately, there are a few different ways to terminate the misbehaving application, including the kill and killall commands. But my favorite method of stopping a stuck graphical application is to use the xkill utility. Press Alt+F2, type xkill, and press Run. Point the cursor to the application you want to terminate and press the left mouse button. This should kill the selected application. Easy, eh?
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Works a treat for me ......
xkill
Pressing the key combination Ctrl-Alt-Escape will change your mouse cursor into a special curosr (showing a X or a skull).
When now clicking inside a application window it will terminate (as a result of the X server disconnecting tha application).
HUH?
Does not work for me.