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@(#)tftp.1 8.2 (Berkeley) 4/18/94
.Dd April 18, 1994 .Dt TFTP 1 .Os .Sh NAME .Nm tftp .Nd trivial file transfer program .Sh SYNOPSIS .Nm .Op Ar host .Sh DESCRIPTION .Nm is the user interface to the Internet .Tn TFTP (Trivial File Transfer Protocol), which allows users to transfer files to and from a remote machine. The remote .Ar host may be specified on the command line, in which case .Nm uses .Ar host as the default host for future transfers (see the .Cm connect command below). .Sh COMMANDS Once .Nm is running, it issues the prompt .Ql tftp> and recognizes the following commands:
p l -tag -width verbose -compact t Cm ? Ar command-name ... Print help information.
p t Cm ascii Shorthand for "mode ascii"
p t Cm binary Shorthand for "mode binary"
p t Cm connect Ar host-name Op Ar port Set the .Ar host (and optionally .Ar port ) for transfers. Note that the .Tn TFTP protocol, unlike the .Tn FTP protocol, does not maintain connections between transfers; thus, the .Cm connect command does not actually create a connection, but merely remembers what host is to be used for transfers. You do not have to use the .Cm connect command; the remote host can be specified as part of the .Cm get or .Cm put commands.
p t Cm get Ar filename t Cm get Ar remotename localname t Cm get Ar file1 file2 ... fileN Get a file or set of files from the specified .Ar sources . .Ar Source can be in one of two forms: a filename on the remote host, if the host has already been specified, or a string of the form .Ar hosts:filename to specify both a host and filename at the same time. If the latter form is used, the last hostname specified becomes the default for future transfers.
p t Cm mode Ar transfer-mode Set the mode for transfers; .Ar transfer-mode may be one of .Em ascii or .Em binary . The default is .Em ascii .
p t Cm put Ar file t Cm put Ar localfile remotefile t Cm put Ar file1 file2 ... fileN remote-directory Put a file or set of files to the specified remote file or directory. The destination can be in one of two forms: a filename on the remote host, if the host has already been specified, or a string of the form .Ar hosts:filename to specify both a host and filename at the same time. If the latter form is used, the hostname specified becomes the default for future transfers. If the remote-directory form is used, the remote host is assumed to be a x machine. If you need to specify IPv6 numeric address to .Ar hosts , wrap them using square bracket like .Ar [hosts]:filename to disambiguate the colon.
p t Cm quit Exit .Nm "" . An end of file also exits.
p t Cm rexmt Ar retransmission-timeout Set the per-packet retransmission timeout, in seconds.
p t Cm status Show current status.
p t Cm timeout Ar total-transmission-timeout Set the total transmission timeout, in seconds.
p t Cm trace Toggle packet tracing.
p t Cm verbose Toggle verbose mode. .El .Sh HISTORY The .Nm command appeared in x 4.3 . IPv6 support was implemented by WIDE/KAME project in 1999. .Sh SECURITY CONSIDERATIONS Because there is no user-login or validation within the .Tn TFTP protocol, the remote site will probably have some sort of file-access restrictions in place. The exact methods are specific to each site and therefore difficult to document here.