[sevanteri]

For this kind of situations xkill is marvelous.

I've used Windows xKill [1] for years, but I can't find a download link for which you don't have to sign in...

Alternatively, SuperF4 [2] looks decent, also with a separate CLI only xkill found in the github issues [3].

[1] https://www.deviantart.com/suprvillain/art/Windows-xKill-100...

[2] https://stefansundin.github.io/superf4/

[3] https://github.com/stefansundin/superf4/issues/39#issuecomme...

[andylynch]

Sysinternals’ process explorer gives you a crosshairs to select a window’s process — that crossbones pointer has more style though.

[jokethrowaway]

Many tiling wm offer something like that out of the box (and KDE among the mainstream desktop managers)

[d110af5ccf]

Worst case, on most Linux setups just C-A-Fnum to a TTY, log back in, and `kill -9` the offending PID from the command line.