sftp(1) on macOS
The text 1a378113b42c, as macOS 11.5, macOS 11.4, macOS 11.3, macOS 11.2, macOS 11.1, macOS 11.0.1, macOS 10.15.6, macOS 10.15.5, macOS 10.15.4 shipped it.
secure file transfer program
Flags it lists
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-4 -
-6 -
-B -
-C -
-D -
-F -
-J -
-P -
-R -
-S -
-a -
-b -
-c -
-f -
-i -
-l -
-o -
-p -
-q -
-r -
-v