scp(1) on macOS
The text cd69c3dd408b, as OS X 10.11.6, OS X 10.11.5, OS X 10.11.4, OS X 10.11.3, OS X 10.11.2, OS X 10.11.1, OS X 10.11 shipped it.
secure copy (remote file copy program)
Flags it lists
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