SYNOPSIS
     ssh-add [-lLdDxX] [-t life] [file ...]
     ssh-add -s reader
     ssh-add -e reader

DESCRIPTION
     ssh-add  adds  RSA  or  DSA identities to the authentication
agent,
     ssh-agent(1).  When run without arguments, it adds the files
     $HOME/.ssh/id_rsa,  $HOME/.ssh/id_dsa and $HOME/.ssh/identi-
ty.  AlternaM--
     tive file names can be given on the command  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 must be an an-
cestor of the
     current process for ssh-add to work.

     The options are as follows:

     -l      Lists fingerprints of all identities currently  rep-
resented by the
             agent.

     -L       Lists  public key parameters of all identities cur-
rently repreM--
             sented by the agent.

     -d      Instead of adding the identity, removes the identity
from the
             agent.

     -D      Deletes all identities from the agent.

     -x      Lock the agent with a password.

     -X      Unlock the agent.

     -t life
             Set  a maximum lifetime when adding identities to an
agent.  The
             lifetime may be specified in seconds or  in  a  time
format speciM--
             fied in sshd(8).

     -s reader
             Add key in smartcard reader.

     $HOME/.ssh/id_rsa
             Contains  the  protocol version 2 RSA authentication
identity of
             the user.

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

ENVIRONMENT
     DISPLAY and SSH_ASKPASS
             If ssh-add needs a  passphrase,  it  will  read  the
passphrase from
             the  current terminal if it was run from a terminal.
If ssh-add
             does not have a terminal associated with it but DIS-
PLAY and
             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.)

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

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

AUTHORS
     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 fea-
tures and creM--
     ated OpenSSH.  Markus Friedl contributed the support for SSH
protocol
     versions 1.5 and 2.0.

SEE ALSO