ssh-add(1) on macOS
The text 1703dc57a29e, as Mac OS X 10.6.8, Mac OS X 10.6.7, Mac OS X 10.6.6, Mac OS X 10.6.5, Mac OS X 10.6.4, Mac OS X 10.6.3, Mac OS X 10.6.2, Mac OS X 10.6.1, Mac OS X 10.6, Mac OS X 10.5.8, Mac OS X 10.5.7, Mac OS X 10.5.6, Mac OS X 10.5.5, Mac OS X 10.5.4, Mac OS X 10.5.3 shipped it.
adds RSA or DSA identities to the authentication agent
Flags it lists
-
-D -
-K -
-L -
-X -
-c -
-d -
-e -
-k -
-l -
-s -
-t -
-x