ash(1) on Linux
The text a5b4e2370e9d, as Debian 9 (Stretch) shipped it.
command interpreter (shell)
Flags it lists
-
-C -
-E -
-G -
-H -
-I -
-L -
-O -
-S -
-V -
-a -
-b -
-c -
-d -
-e -
-f -
-g -
-h -
-i -
-k -
-l -
-m -
-n -
-number -
-p -
-r -
-s -
-t -
-u -
-v -
-w -
-x -
-z