ssh-add(1) on Linux
The text 4e39da118a5a, as Debian 11 (Bullseye) shipped it.
adds private key identities to the OpenSSH authentication agent
Flags it lists
-
-D -
-E -
-K -
-L -
-S -
-X -
-c -
-d -
-e -
-k -
-l -
-q -
-s -
-t -
-v -
-x