## NAME

## SYNOPSIS

## DESCRIPTION

adds private key identities to the authentication agent,

When run without arguments, it adds the files

and

After loading a private key,

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,

asks for the passphrase from the user. The passphrase is read from the user's tty.

retries the last passphrase if multiple identity files are given.

The authentication agent must be running and the

environment variable must contain the name of its socket for

to work.

The options are as follows:

Indicates that added identities should be subject to confirmation before being used for authentication. Confirmation is performed by the

program mentioned below. Successful confirmation is signaled by a zero exit status from the

program, rather than text entered into the requester.

Deletes all identities from the agent.

Instead of adding identities, removes identities from the agent. If

has been run without arguments, the keys for the default identities and their corresponding certificates will be removed. Otherwise, the argument list will be interpreted as a list of paths to public key files to specify keys and certificates to be removed from the agent. If no public key is found at a given path,

will append

and retry.

Remove keys provided by the PKCS#11 shared library

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

Lists public key parameters of all identities currently represented by the agent.

Lists fingerprints of all identities currently represented by the agent.

Add keys provided by the PKCS#11 shared library

Set a maximum lifetime when adding identities to an agent. The lifetime may be specified in seconds or in a time format specified in

Unlock the agent.

Lock the agent with a password.

## ENVIRONMENT

If

needs a passphrase, it will read the passphrase from the current terminal if it was run from a terminal. If

does not have a terminal associated with it but

and

are set, it will execute the program specified by

and open an X11 window to read the passphrase. This is particularly useful when calling

from a

or related script. (Note that on some machines it may be necessary to redirect the input from

to make this work.)

Identifies the path of a

socket used to communicate with the agent.

## FILES

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 ED25519 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

ignores identity files if they are accessible by others.

## EXIT STATUS

Exit status is 0 on success, 1 if the specified command fails, and 2 if

is unable to contact the authentication agent.

## SEE ALSO

## 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 created OpenSSH. Markus Friedl contributed the support for SSH protocol versions 1.5 and 2.0.