ssh-keygen(1) on macOS
The text d3deb628e042, as Mac OS X 10.0.1, Mac OS X 10.0 shipped it.
authentication key generation
Flags it lists
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-C -
-N -
-P -
-R -
-X -
-b -
-c -
-f -
-l -
-p -
-q -
-x -
-y