ssh-keyscan(1) on macOS
The text 3770cd7a6879, as Mac OS X 10.8.5, Mac OS X 10.8.4, Mac OS X 10.8.3, Mac OS X 10.8.2, Mac OS X 10.8.1, Mac OS X 10.8 shipped it.
gather ssh public keys
Flags it lists
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-4 -
-6 -
-H -
-T -
-f -
-p -
-t -
-v