bl(1) on Linux
The text b9c86b099439, as Debian 3.1 (Sarge), Debian 3.0 (Woody) shipped it.
blinkenlights: blink keyboard LEDs
Flags it lists
-
-B -
-C -
-N -
-S -
-b -
-c -
-d -
-k -
-l -
-r -
-s