file(1) on FreeBSD
The text 31a6149f6803, as FreeBSD 4.2-RELEASE, FreeBSD 4.1.1-RELEASE, FreeBSD 4.1-RELEASE, FreeBSD 4.0-RELEASE shipped it.
determine file type
Flags it lists
-
-L -
-c -
-f -
-m -
-v -
-z