Kill the currently active window with a keyboard shortcut
I think you are looking for xkill.
Start it in a shell, then click on the offending window.
Alternatively, you can do Alt-F4 and wait - then you will be asked
the program is not responding - terminate it? (you will lose unsaved work)
Use xdotool to kill the currently active window:
xdotool getwindowfocus windowkill
On Ubuntu, make a keyboard shortcut:
- Open Keyboard settings (shown below).
- Create a shortcut with the command:
xdotool getwindowfocus windowkill
I chose: Ctrl+Alt+x
This shortcut will kill the currently active window immediately. It will not wait for the application to respond, terminate, save, close files, finish up, etc.
The default kill-window shortcut for me in KDE is Ctrl+Alt+Esc
(There's a separate Alt+F4 "close window" entry)
System Settings -> Shortcuts and Gestures -> Global Keyboard Shortcuts -> KWin