TFTP(1C) — Unix Programmer’s Manual

NAME

tftp − trivial file transfer program

SYNOPSIS

tftp [ host ]

DESCRIPTION

Tftp is the user interface to the Internet TFTP (Trivial File Transfer Protocol), which allows users to transfer files to and from a remote machine. If you specify the remote host on the command line, tftp uses the specified host as the default host for future transfers (see the connect command below).

COMMANDS

Once tftp is running, it issues the prompt tftp> and recognizes the following commands:

ascii Shorthand for "mode ascii"

binary
Shorthand for "mode binary"

connect host-name [ port ]
Sets the host (and optionally port) for transfers. Note that the TFTP protocol, unlike the FTP protocol, does not maintain connections betweeen transfers; thus, the 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 connect command; the remote host can be specified as part of the get or put commands.

mode transfer-mode
Sets the mode for transfers; transfer-mode may be one of ascii or binary. The default is ascii.

get filename

get remotename localname

get file1 file2 ... fileN
Gets a file or set of files from the specified sources. 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 host: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.

put file

put localfile remotefile

put file1 file2 ... fileN remote-directory
Puts 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 host: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 UNIX machine.

quit Exits tftp. An end-of-file also exits.

rexmt retransmission-timeout
Sets the per-packet retransmission timeout, in seconds.

status
Shows current status.

timeout total-transmission-timeout
Sets the total transmission timeout, in seconds.

trace Toggles packet tracing.

verbose
Toggles verbose mode.

? [ command-name ... ]
Prints help information.

BUGS

Because there is no user-login or validation within the 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.