ssh-add(1) - phpMan

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SSH-ADD(1)                BSD General Commands Manual               SSH-ADD(1)

     ssh-add - adds private key identities to the authentication agent

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

     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 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 environment 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 confirmation is signaled by a zero exit
             status from the SSH_ASKPASS program, rather than text entered into the

     -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 represented by the

     -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 specified in

     -T token
             Explicitly set token name.  sshd_config(5).

     -X      Unlock the agent.

     -x      Lock the agent with a password.

             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 DISPLAY 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.)

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

             The reseeding of the OpenSSL random generator is usually done from
             /dev/urandom.  If the SSH_USE_STRONG_RNG environment variable 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 setting is not recommended on the computers without the hard-
             ware random generator because insufficient entropy causes the connection to
             be blocked until enough entropy is available.

             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), 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 created OpenSSH.  Markus Friedl con-
     tributed the support for SSH protocol versions 1.5 and 2.0.

BSD                            December 12, 2017                           BSD

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