ssh-add [-cDdLlXx] [-t life] [file ...]
     ssh-add -s pkcs11
     ssh-add -e pkcs11

     ssh-add adds private key identities to the authentication agent,
     ssh-agent(1).  When run without arguments, it adds the files
     ~/.ssh/id_rsa, ~/.ssh/id_dsa, ~/.ssh/id_ecdsa and ~/.ssh/identity.  After
     loading a private key, ssh-add will try to load corresponding certificate
     information from the filename obtained by appending to the name
     of the private key file.  Alternative file names can be given on the com-
     mand line.

     If any file requires a passphrase, ssh-add asks for the passphrase from
     the user.  The passphrase is read from the user's tty.  ssh-add retries
     the last passphrase if multiple identity files are given.

     The authentication agent must be running and the SSH_AUTH_SOCK environ-
     ment variable must contain the name of its socket for ssh-add to work.

     Any keys recorded in the blacklist of known-compromised keys (see
     ssh-vulnkey(1)) will be refused.

     The options are as follows:

     -c      Indicates that added identities should be subject to confirmation
             before being used for authentication.  Confirmation is performed
             by the SSH_ASKPASS program mentioned below.  Successful confirma-
             tion is signaled by a zero exit status from the SSH_ASKPASS pro-
             gram, rather than text entered into the requester.

     -D      Deletes all identities from the agent.

     -d      Instead of adding identities, removes identities from the agent.
             If ssh-add has been run without arguments, the keys for the
             default identities will be removed.  Otherwise, the argument list
             will be interpreted as a list of paths to public key files and
             matching keys will be removed from the agent.  If no public key
             is found at a given path, ssh-add will append .pub and retry.

     -e pkcs11
             Remove keys provided by the PKCS#11 shared library pkcs11.

     -L      Lists public key parameters of all identities currently repre-
             sented by the agent.

     -l      Lists fingerprints of all identities currently represented by the

     -s pkcs11
             Add keys provided by the PKCS#11 shared library pkcs11.

     -t life
             Set a maximum lifetime when adding identities to an agent.  The
             SSH_ASKPASS are set, it will execute the program specified by
             SSH_ASKPASS and open an X11 window to read the passphrase.  This
             is particularly useful when calling ssh-add from a .xsession or
             related script.  (Note that on some machines it may be necessary
             to redirect the input from /dev/null to make this work.)

             Identifies the path of a UNIX-domain socket used to communicate
             with the agent.

             Contains the protocol version 1 RSA authentication identity of
             the user.

             Contains the protocol version 2 DSA authentication identity of
             the user.

             Contains the protocol version 2 ECDSA authentication identity of
             the user.

             Contains the protocol version 2 RSA authentication identity of
             the user.

     Identity files should not be readable by anyone but the user.  Note that
     ssh-add ignores identity files if they are accessible by others.

     Exit status is 0 on success, 1 if the specified command fails, and 2 if
     ssh-add is unable to contact the authentication agent.

     ssh(1), ssh-agent(1), ssh-keygen(1), ssh-vulnkey(1), sshd(8)

     OpenSSH is a derivative of the original and free ssh 1.2.12 release by
     Tatu Ylonen.  Aaron Campbell, Bob Beck, Markus Friedl, Niels Provos, Theo
     de Raadt and Dug Song removed many bugs, re-added newer features and cre-
     ated OpenSSH.  Markus Friedl contributed the support for SSH protocol
     versions 1.5 and 2.0.

BSD                             August 17, 2017                            BSD
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