I used to work with window in the past, and when Windows was stuck (cursor doesn't move or respond to clicks, for example), I could just clicked Ctrl+Alt+Delete, open the task manager and end the task that causes the OS to stuck.

Unfortunately, this feature doesn't exist in Ubuntu. I know the command 'xkill', but it doesn't always work, and in order to use it, I first have to open a terminal. When Ubuntu is stack, sometimes it's not possible to open a terminal. I also know the commands 'lsof' and 'kill -9 ...'. Still, it's not always useful when OS is stuck.

Do you know any technique that is as effective as ctrl+alt+del in Windows?

  • Alt+SysRq+ S,U,B
    – Pilot6
    Apr 22, 2017 at 8:32
  • 1
    Possible duplicate of What should I do when Ubuntu freezes? Where you can find Alt+SysRq+ S,U,B as well as Ctrl+Alt+F1 and other ways to get Ubuntu unstuck.
    – karel
    Apr 22, 2017 at 9:03

1 Answer 1


You can press Ctrl+Alt+F1 to get to console, where you can kill any process.

If that does not work either, you can reboot by Ctrl+Alt+S,U,B.

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