i3lock(1) on Linux
The text d23fb2b9c8d2, as Debian 10 (Buster) shipped it.
improved screen locker
Flags it lists
-
--beep -
--color -
--debug -
--ignore-empty-password -
--image -
--no-unlock-indicator -
--nofork -
--pointer -
--show-failed-attempts -
--tiling -
--version -
-b -
-c -
-e -
-f -
-i -
-n -
-p -
-t -
-u -
-v