scp(1) on macOS
The text e42e110febd8, as macOS 10.13.1, macOS 10.13, macOS 10.12.6, macOS 10.12.5, macOS 10.12.4, macOS 10.12.3, macOS 10.12.2 shipped it.
secure copy (remote file copy program)
Flags it lists
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-1 -
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-6 -
-B -
-C -
-F -
-P -
-S -
-c -
-i -
-l -
-o -
-p -
-q -
-r -
-v