dbclient

NAME

dbclient − lightweight SSH2 client

SYNOPSIS

dbclient [−Tt] [−p port] [−i id] [−L l:h:r] [−R l:h:r] [−l user] host

DESCRIPTION

dbclient is a SSH 2 client designed to be small enough to be used in small memory environments, while still being functional and secure enough for general use.

OPTIONS

−p port

Remote port. Connect to port port on the remote host. Default is 22.

−i idfile

Identity file. Read the identity from file idfile (multiple allowed).

−L listenport:host:port

Local port forwarding. Forward the port listenport on the local host through the SSH connection to port port on the host host.

−R listenport:host:port

Remote port forwarding. Forward the port listenport on the remote host through the SSH connection to port port on the host host.

−l user

Username. Login as user on the remote host.

	−t		Allocate a pty.
	−T		Don’t allocate a pty.
	−N		Don’t request a remote shell or run any commands. Any command arguments are ignored.
	−f		Fork into the background after authentication. A command argument (or -N) is required. This is useful when using password authentication.
	−g		Allow non-local hosts to connect to forwarded ports. Applies to -L and -R forwarded ports, though remote connections to -R forwarded ports may be limited by the ssh server.
	−y		Always accept hostkeys if they are unknown. If a hostkey mismatch occurs the connection will abort as normal.

−W windowsize

Specify the per-channel receive window buffer size. Increasing this may improve network performance at the expense of memory use. Use -h to see the default buffer size.

−K timeout_seconds

Ensure that traffic is transmitted at a certain interval in seconds. This is useful for working around firewalls or routers that drop connections after a certain period of inactivity. The trade-off is that a session may be closed if there is a temporary lapse of network connectivity. A setting if 0 disables keepalives.

ENVIRONMENT

SSH_ASKPASS

dbclient can use an external program to request a password from a user. SSH_ASKPASS should be set to the path of a program that will return a password on standard output. This program will only be used if either DISPLAY is set and standard input is not a TTY, or the environment variable SSH_ASKPASS_ALWAYS is set.

DROPBEAR_PASSWORD

A password to use for remote authentication can be specified in the environment variable DROPBEAR_PASSWORD. Care should be taken that the password is not exposed to other users on a multi-user system, or stored in accessible files.

AUTHOR

Matt Johnston (matt AT ucc DOT asn DOT au).
Gerrit Pape (pape AT smarden DOT org) wrote this manual page.

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