plink (1)

NAME

plink - PuTTY link, command line network connection tool

SYNOPSIS

plink [options] [user@]host [command]

DESCRIPTION

plink is a network connection tool supporting several protocols.

OPTIONS

The command-line options supported by plink are:

-V

Show version information and exit.

-pgpfp

Display the fingerprints of the PuTTY PGP Master Keys and exit, to aid in verifying new files released by the PuTTY team.

-v

Show verbose messages.

-load session

Load settings from saved session.

-ssh

Force use of SSH protocol (default).

-telnet

Force use of Telnet protocol.

-rlogin

Force use of rlogin protocol.

-raw

Force raw mode.

-serial

Force serial mode.

-proxycmd command

Instead of making a TCP connection, use command as a proxy; network traffic will be redirected to the standard input and output of command. command must be a single word, so is likely to need quoting by the shell.

The special strings %host and %port in command will be replaced by the hostname and port number you want to connect to; to get a literal % sign, enter %%.

Backslash escapes are also supported, such as sequences like \n being replaced by a literal newline; to get a literal backslash, enter \\. (Further escaping may be required by the shell.)

(See the main PuTTY manual for full details of the supported %- and backslash-delimited tokens, although most of them are probably not very useful in this context.)

-P port

Connect to port port.

-l user

Set remote username to user.

-m path

Read remote command(s) from local file path.

-batch

Disable interactive prompts.

-pw password

Set remote password to password. CAUTION: this will likely make the password visible to other users of the local machine (via commands such as `w').

-L [srcaddr:]srcport:desthost:destport

Set up a local port forwarding: listen on srcport (or srcaddr:srcport if specified), and forward any connections over the SSH connection to the destination address desthost:destport. Only works in SSH.

-R [srcaddr:]srcport:desthost:destport

Set up a remote port forwarding: ask the SSH server to listen on srcport (or srcaddr:srcport if specified), and to forward any connections back over the SSH connection where the client will pass them on to the destination address desthost:destport. Only works in SSH.

-D [srcaddr:]srcport

Set up dynamic port forwarding. The client listens on srcport (or srcaddr:srcport if specified), and implements a SOCKS server. So you can point SOCKS-aware applications at this port and they will automatically use the SSH connection to tunnel all their connections. Only works in SSH.

-X

Enable X11 forwarding.

-x

Disable X11 forwarding (default).

-A

Enable agent forwarding.

-a

Disable agent forwarding (default).

-t

Enable pty allocation (default if a command is NOT specified).

-T

Disable pty allocation (default if a command is specified).

-1

Force use of SSH protocol version 1.

-2

Force use of SSH protocol version 2.

-4, -6

Force use of IPv4 or IPv6 for network connections.

-C

Enable SSH compression.

-i keyfile

Private key file for user authentication. For SSH-2 keys, this key file must be in PuTTY's PPK format, not OpenSSH's format or anyone else's.

If you are using an authentication agent, you can also specify a public key here (in RFC 4716 or OpenSSH format), to identify which of the agent's keys to use.

-noagent

Don't try to use an authentication agent for local authentication. (This doesn't affect agent forwarding.)

-agent

Allow use of an authentication agent. (This option is only necessary to override a setting in a saved session.)

-hostkey key

Specify an acceptable host public key. This option may be specified multiple times; each key can be either a fingerprint (99:aa:bb:...) or a base64-encoded blob in OpenSSH's one-line format.

Specifying this option overrides automated host key management; only the key(s) specified on the command-line will be accepted (unless a saved session also overrides host keys, in which case those will be added to), and the host key cache will not be written.

-s

Remote command is SSH subsystem (SSH-2 only).

-N

Don't start a remote command or shell at all (SSH-2 only).

-nc host:port

Make a remote network connection from the server instead of starting a shell or command.

-sercfg configuration-string

Specify the configuration parameters for the serial port, in -serial mode. configuration-string should be a comma-separated list of configuration parameters as follows:

*

Any single digit from 5 to 9 sets the number of data bits.

*

`1', `1.5' or `2' sets the number of stop bits.

*

Any other numeric string is interpreted as a baud rate.

*

A single lower-case letter specifies the parity: `n' for none, `o' for odd, `e' for even, `m' for mark and `s' for space.

*

A single upper-case letter specifies the flow control: `N' for none, `X' for XON/XOFF, `R' for RTS/CTS and `D' for DSR/DTR.

-sshlog logfile

-sshrawlog logfile

For SSH connections, these options make plink log protocol details to a file. (Some of these may be sensitive, although by default an effort is made to suppress obvious passwords.)

-sshlog logs decoded SSH packets and other events (those that -v would print). -sshrawlog additionally logs the raw encrypted packet data.

-shareexists

Instead of making a new connection, test for the presence of an existing connection that can be shared. The desired session can be specified in any of the usual ways.

Returns immediately with a zero exit status if a suitable `upstream' exists, nonzero otherwise.

MORE INFORMATION

For more information on plink, it's probably best to go and look at the manual on the PuTTY web page:

www.chiark.greenend.org.uk/~sgtatham/putty

BUGS

This man page isn't terribly complete. See the above web link for better documentation.