ssh-keyscan(1) on macOS
The text 583b1d676a97, as Mac OS X 10.7.5, Mac OS X 10.7.4, Mac OS X 10.7.3, Mac OS X 10.7.2, Mac OS X 10.7.1, Mac OS X 10.7 shipped it.
gather ssh public keys
Flags it lists
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-4 -
-6 -
-H -
-T -
-f -
-p -
-t -
-v