sftp(1) on macOS
The text 13a25d20f361, as macOS 10.13.6, macOS 10.13.5, macOS 10.13.4, macOS 10.13.3, macOS 10.13.2 shipped it.
secure file transfer program
Flags it lists
-
-4 -
-6 -
-B -
-C -
-D -
-F -
-P -
-R -
-S -
-a -
-b -
-c -
-f -
-i -
-l -
-o -
-p -
-q -
-r -
-v