hd(1) on FreeBSD
The text 5b6a9761f37f, as FreeBSD 4.6.2-RELEASE, FreeBSD 4.6-RELEASE, FreeBSD 4.5-RELEASE shipped it.
ASCII, decimal, hexadecimal, octal dump
Flags it lists
-
-C -
-b -
-c -
-d -
-e -
-f -
-n -
-o -
-s -
-v -
-x