i3lock(1) on Linux
The text 211a29c53254, as Debian 8 (Jessie) shipped it.
improved screen locker
Flags it lists
-
--beep -
--color -
--dpms -
--ignore-empty-password -
--image -
--inactivity-timeout -
--no-unlock-indicator -
--nofork -
--pointer -
--tiling -
--version -
-I -
-b -
-c -
-d -
-e -
-i -
-n -
-p -
-t -
-u -
-v