pnmtojbig(1) on Linux
The text fe3436b595da, as Debian 12 (Bookworm) shipped it.
PNM to JBIG file converter
Flags it lists
-
-b -
-c -
-d -
-h -
-l -
-m -
-o -
-p -
-q -
-s -
-t -
-v -
-x -
-y