cmatrix(1) on Linux
The text b14cd96d8ea9, as Debian 10 (Buster) shipped it.
simulates the display from "The Matrix"
Flags it lists
-
-? -
-B -
-C -
-V -
-a -
-b -
-f -
-h -
-l -
-n -
-o -
-s -
-u -
-x