Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages


home | help
SSH-ADD(1)		  BSD General Commands Manual		    SSH-ADD(1)

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

     ssh-add [-cDdkLlqXx] [-E fingerprint_hash]	[-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/id_ed25519.
     After loading a private key, ssh-add will try to load corresponding cer-
     tificate 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 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	ssh-askpass(1).	 Successful confirmation is signaled by	a zero
	     exit status from ssh-askpass(1), 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 de-
	     fault identities and their	corresponding certificates will	be re-
	     moved.  Otherwise,	the argument list will be interpreted as a
	     list of paths to public key files to specify keys and certifi-
	     cates to be removed from the agent.  If no	public key is found at
	     a given path, ssh-add will	append .pub and	retry.

     -E	fingerprint_hash
	     Specifies the hash	algorithm used when displaying key finger-
	     prints.  Valid options are: "md5" and "sha256".  The default is

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

     -k	     When loading keys into or deleting	keys from the agent, process
	     plain private keys	only and skip certificates.

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

     -l	     Lists fingerprints	of all identities currently represented	by the

     -q	     Be	quiet after a successful operation.

     -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
	     lifetime may be specified in seconds or in	a time format speci-
	     fied in 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 (by default "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 DSA authentication identity of the user.

	     Contains the ECDSA	authentication identity	of the user.

	     Contains the Ed25519 authentication identity of the user.

	     Contains the 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-askpass(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 cre-
     ated OpenSSH.  Markus Friedl contributed the support for SSH protocol
     versions 1.5 and 2.0.

BSD				August 29, 2017				   BSD


Want to link to this manual page? Use this URL:

home | help