scp(1) on macOS
The text debcbda84c01, as Mac OS X 10.5.2, Mac OS X 10.5.1, Mac OS X 10.5, Mac OS X 10.4.11.x86, Mac OS X 10.4.11.ppc, Mac OS X 10.4.10.x86, Mac OS X 10.4.10.ppc, Mac OS X 10.4.9.x86, Mac OS X 10.4.9.ppc shipped it.
secure copy (remote file copy program)
Flags it lists
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-1 -
-2 -
-4 -
-6 -
-B -
-C -
-E -
-F -
-P -
-S -
-c -
-i -
-l -
-o -
-p -
-q -
-r -
-v