files] ssh-add -e|-s
Add RSA or DSA identities to the authentication agent (see ssh-agent), which must be running and must be an ancestor of the current process. With no arguments specified, add the files $HOME/.ssh/id_rsa, $HOME/.ssh/id_dsa, and $HOME/.ssh/identity. If any files are specified, add those instead, prompting for a passphrase if required.
Remove an identity from the agent instead of adding one.
Delete all identities from the agent.
Remove key in specified smartcard reader.
List fingerprints of all identities known to the agent.
List public key parameters of all identities known to the agent.
Add key in smartcard reader.
Set maximum lifetime when adding identities to an agent. The value of life can be in seconds or another time format specified in sshd.
Lock the agent with a password.
Unlock the agent.