nl(1) on OpenBSD
The text b2f3559731ec, as OpenBSD 6.0, OpenBSD 5.9, OpenBSD 5.8, OpenBSD 5.7 shipped it.
line numbering filter
Flags it lists
-
-b -
-d -
-f -
-h -
-i -
-l -
-n -
-p -
-s -
-v -
-w