test(1) on Linux
The text 22d48c580e5d, as Debian 6.0 (Squeeze) shipped it.
check file types and compare values
Flags it lists
-
--help -
--version -
-G -
-L -
-O -
-S -
-b -
-c -
-d -
-e -
-f -
-g -
-h -
-k -
-n -
-p -
-r -
-s -
-t -
-u -
-w -
-x -
-z