SYNOPSIS
     ssh-add [-lLdDxXc] [-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.  Alterna-
     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  the
SSH_AUTH_SOCK environ-
     ment variable must contain the name of its socket  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 repre-
             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 speci-
             fied in sshd_config(5).

     -c      Indicates that added identities should be subject to

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.

FILES
     $HOME/.ssh/identity
             Contains  the  protocol version 1 RSA authentication
identity of
             the user.

     $HOME/.ssh/id_dsa
             Contains the protocol version 2  DSA  authentication
identity of
             the user.

     $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.

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.

SEE ALSO
2