.Os
.Sh NAME
.Nm ssh-add
-.Nd adds identities for the authentication agent
+.Nd adds RSA identities for the authentication agent
.Sh SYNOPSIS
.Nm ssh-add
-.Op Fl ldD
+.Op Fl lLdD
.Op Ar
-.Sh DESCRIPTION
+.Sh DESCRIPTION
.Nm
-adds identities to the authentication agent,
+adds RSA identities to the authentication agent,
.Xr ssh-agent 1 .
When run without arguments, it adds the file
.Pa $HOME/.ssh/identity .
-Alternative file names can be given on the
-command line. If any file requires a passphrase,
+Alternative file names can be given on the command line.
+If any file requires a passphrase,
.Nm
-asks for the passphrase from the user.
-The Passphrase it is read from the user's tty.
+asks for the passphrase from the user.
+The Passphrase it is read from the user's tty.
.Pp
The authentication agent must be running and must be an ancestor of
the current process for
The options are as follows:
.Bl -tag -width Ds
.It Fl l
-Lists all identities currently represented by the agent.
+Lists fingerprints of all identities currently represented by the agent.
+.It Fl L
+Lists public key parameters of all identities currently represented by the agent.
.It Fl d
Instead of adding the identity, removes the identity from the agent.
.It Fl D
.El
.Sh FILES
.Bl -tag -width Ds
-.Pa $HOME/.ssh/identity
-Contains the RSA authentication identity of the user. This file
-should not be readable by anyone but the user.
+.It Pa $HOME/.ssh/identity
+Contains the RSA authentication identity of the user.
+This file should not be readable by anyone but the user.
Note that
.Nm
ignores this file if it is accessible by others.
It is possible to
specify a passphrase when generating the key; that passphrase will be
-used to encrypt the private part of this file. This is the
-default file added by
+used to encrypt the private part of this file.
+This is the default file added by
.Nm
when no other files have been specified.
.Pp
+.Sh ENVIRONMENT
+.Bl -tag -width Ds
+.It Ev "DISPLAY" and "SSH_ASKPASS"
If
.Nm
needs a passphrase, it will read the passphrase from the current
-terminal if it was run from a terminal. If
+terminal if it was run from a terminal.
+If
.Nm
does not have a terminal associated with it but
.Ev DISPLAY
-is set, it
-will open an X11 window to read the passphrase. This is particularly
-useful when calling
+and
+.Ev SSH_ASKPASS
+are set, it will execute the program specified by
+.Ev SSH_ASKPASS
+and open an X11 window to read the passphrase.
+This is particularly useful when calling
.Nm
from a
.Pa .Xsession
-or related script. (Note that on some machines it
+or related script.
+(Note that on some machines it
may be necessary to redirect the input from
.Pa /dev/null
to make this work.)
.Pp
OpenSSH
is a derivative of the original (free) ssh 1.2.12 release, but with bugs
-removed and newer features re-added. Rapidly after the 1.2.12 release,
-newer versions bore successively more restrictive licenses. This version
-of OpenSSH
+removed and newer features re-added.
+Rapidly after the 1.2.12 release,
+newer versions bore successively more restrictive licenses.
+This version of OpenSSH
.Bl -bullet
.It
-has all components of a restrictive nature (ie. patents, see
-.Xr ssl 8 )
+has all components of a restrictive nature (i.e., patents)
directly removed from the source code; any licensed or patented components
are chosen from
external libraries.
.It
has been updated to support ssh protocol 1.5.
.It
-contains added support for
+contains added support for
.Xr kerberos 8
authentication and ticket passing.
.It
supports one-time password authentication with
.Xr skey 1 .
.El
-.Pp
-The libraries described in
-.Xr ssl 8
-are required for proper operation.
.Sh SEE ALSO
.Xr ssh 1 ,
.Xr ssh-agent 1 ,
.Xr ssh-keygen 1 ,
.Xr sshd 8 ,
-.Xr ssl 8