nl(1) on FreeBSD
The text a672e4a75552, as FreeBSD 5.5-RELEASE, FreeBSD 5.4-RELEASE shipped it.
line numbering filter
Flags it lists
-
-b -
-d -
-f -
-h -
-i -
-l -
-n -
-p -
-s -
-v -
-w