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    Command:

    ssh-add

    
         ssh-add -s pkcs11
         ssh-add -e pkcs11
         ssh-add -n [-T token]
    
    
    

    DESCRIPTION

         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 -cert.pub 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.
    
         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 key provided by 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
                 agent.
    
         -s pkcs11
                 Add key provided by pkcs11.
    
         -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-
                 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.
    
         SSH_USE_STRONG_RNG
                 The reseeding of the OpenSSL random generator is usually done
                 from /dev/urandom.  If the SSH_USE_STRONG_RNG environment vari-
                 able is set to value other than 0 the OpenSSL random generator is
                 reseeded from /dev/random.  The number of bytes read is defined
                 by the SSH_USE_STRONG_RNG value.  Minimum is 14 bytes.  This set-
                 ting is not recommended on the computers without the hardware
                 random generator because insufficient entropy causes the connec-
                 tion to be blocked until enough entropy is available.
    
    
    

    FILES

         ~/.ssh/identity
                 Contains the protocol version 1 RSA authentication identity of
                 the user.
    
         ~/.ssh/id_dsa
                 Contains the protocol version 2 DSA authentication identity of
                 the user.
    
         ~/.ssh/id_ecdsa
                 Contains the protocol version 2 ECDSA authentication identity of
                 the user.
    
         ~/.ssh/id_rsa
                 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.
    
    
    

    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

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

    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 features and cre-
         ated OpenSSH.  Markus Friedl contributed the support for SSH protocol
    
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