Import of OpenSSH 5.1p1

[gssapi-openssh.git] / openssh / ssh-agent.1

diff --git a/openssh/ssh-agent.1 b/openssh/ssh-agent.1
index 0227436c1719331fc18b571533e88c182b67deea..6a5dc62afd83e04f0d78824e65c587f394360ae8 100644 (file)
--- a/openssh/ssh-agent.1
+++ b/openssh/ssh-agent.1
@@ -1,4 +1,4 @@
-.\" $OpenBSD: ssh-agent.1,v 1.35 2002/06/24 13:12:23 markus Exp $
+.\" $OpenBSD: ssh-agent.1,v 1.46 2007/09/09 11:38:01 sobrado Exp $
 .\"
 .\" Author: Tatu Ylonen <ylo@cs.hut.fi>
 .\" Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -34,7 +34,7 @@
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd September 25, 1999
+.Dd $Mdocdate: June 5 2007 $
 .Dt SSH-AGENT 1
 .Os
 .Sh NAME
@@ -42,10 +42,11 @@
 .Nd authentication agent
 .Sh SYNOPSIS
 .Nm ssh-agent
-.Op Fl a Ar bind_address
 .Op Fl c Li | Fl s
 .Op Fl d
-.Op Ar command Op Ar args ...
+.Op Fl a Ar bind_address
+.Op Fl t Ar life
+.Op Ar command Op Ar arg ...
 .Nm ssh-agent
 .Op Fl c Li | Fl s
 .Fl k
@@ -69,27 +70,36 @@ The options are as follows:
 Bind the agent to the unix-domain socket
 .Ar bind_address .
 The default is
-.Pa /tmp/ssh-XXXXXXXX/agent.<ppid> .
+.Pa /tmp/ssh-XXXXXXXXXX/agent.\*(Ltppid\*(Gt .
 .It Fl c
 Generate C-shell commands on
 .Dv stdout .
 This is the default if
 .Ev SHELL
 looks like it's a csh style of shell.
+.It Fl d
+Debug mode.
+When this option is specified
+.Nm
+will not fork.
+.It Fl k
+Kill the current agent (given by the
+.Ev SSH_AGENT_PID
+environment variable).
 .It Fl s
 Generate Bourne shell commands on
 .Dv stdout .
 This is the default if
 .Ev SHELL
 does not look like it's a csh style of shell.
-.It Fl k
-Kill the current agent (given by the
-.Ev SSH_AGENT_PID
-environment variable).
-.It Fl d
-Debug mode.  When this option is specified
-.Nm
-will not fork.
+.It Fl t Ar life
+Set a default value for the maximum lifetime of identities added to the agent.
+The lifetime may be specified in seconds or in a time format specified in
+.Xr sshd_config 5 .
+A lifetime specified for an identity with
+.Xr ssh-add 1
+overrides this value.
+Without this option the default maximum lifetime is forever.
 .El
 .Pp
 If a commandline is given, this is executed as a subprocess of the agent.
@@ -101,10 +111,10 @@ Keys are added using
 When executed without arguments,
 .Xr ssh-add 1
 adds the files
-.Pa $HOME/.ssh/id_rsa ,
-.Pa $HOME/.ssh/id_dsa
+.Pa ~/.ssh/id_rsa ,
+.Pa ~/.ssh/id_dsa
 and
-.Pa $HOME/.ssh/identity .
+.Pa ~/.ssh/identity .
 If the identity has a passphrase,
 .Xr ssh-add 1
 asks for the passphrase (using a small X11 application if running
@@ -123,14 +133,26 @@ However, the connection to the agent is forwarded over SSH
 remote logins, and the user can thus use the privileges given by the
 identities anywhere in the network in a secure way.
 .Pp
-There are two main ways to get an agent setup:
-Either the agent starts a new subcommand into which some environment
-variables are exported, or the agent prints the needed shell commands
-(either
+There are two main ways to get an agent set up:
+The first is that the agent starts a new subcommand into which some environment
+variables are exported, eg
+.Cm ssh-agent xterm & .
+The second is that the agent prints the needed shell commands (either
+.Xr sh 1
+or
+.Xr csh 1
+syntax can be generated) which can be evalled in the calling shell, eg
+.Cm eval `ssh-agent -s`
+for Bourne-type shells such as
 .Xr sh 1
 or
+.Xr ksh 1
+and
+.Cm eval `ssh-agent -c`
+for
 .Xr csh 1
-syntax can be generated) which can be evalled in the calling shell.
+and derivatives.
+.Pp
 Later
 .Xr ssh 1
 looks at these variables and uses them to establish a connection to the agent.
@@ -157,18 +179,23 @@ The agent exits automatically when the command given on the command
 line terminates.
 .Sh FILES
 .Bl -tag -width Ds
-.It Pa $HOME/.ssh/identity
+.It Pa ~/.ssh/identity
 Contains the protocol version 1 RSA authentication identity of the user.
-.It Pa $HOME/.ssh/id_dsa
+.It Pa ~/.ssh/id_dsa
 Contains the protocol version 2 DSA authentication identity of the user.
-.It Pa $HOME/.ssh/id_rsa
+.It Pa ~/.ssh/id_rsa
 Contains the protocol version 2 RSA authentication identity of the user.
-.It Pa /tmp/ssh-XXXXXXXX/agent.<ppid>
+.It Pa /tmp/ssh-XXXXXXXXXX/agent.\*(Ltppid\*(Gt
 Unix-domain sockets used to contain the connection to the
 authentication agent.
 These sockets should only be readable by the owner.
 The sockets should get automatically removed when the agent exits.
 .El
+.Sh SEE ALSO
+.Xr ssh 1 ,
+.Xr ssh-add 1 ,
+.Xr ssh-keygen 1 ,
+.Xr sshd 8
 .Sh AUTHORS
 OpenSSH is a derivative of the original and free
 ssh 1.2.12 release by Tatu Ylonen.
@@ -178,8 +205,3 @@ removed many bugs, re-added newer features and
 created OpenSSH.
 Markus Friedl contributed the support for SSH
 protocol versions 1.5 and 2.0.
-.Sh SEE ALSO
-.Xr ssh 1 ,
-.Xr ssh-add 1 ,
-.Xr ssh-keygen 1 ,
-.Xr sshd 8