TFTP(1) MidnightBSD General Commands Manual TFTP(1)

NAME

tftp — trivial file transfer program

SYNOPSIS

tftp [host [port]]

DESCRIPTION

The tftp utility is the user interface to the Internet TFTP (Trivial File Transfer Protocol), which allows users to transfer files to and from a remote machine. The remote host may be specified on the command line, in which case tftp uses 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:

? command-name ...

Print help information.

ascii

Shorthand for mode ascii.

binary

Shorthand for mode binary.

connect host [port]

Set the host (and optionally port) for transfers. Note that the TFTP protocol, unlike the FTP protocol, does not maintain connections between 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.

get [
host
:]file [localname]
get

[
host1
:]file1 [
host2
:]file2 ... [
hostN
:]fileN

Get one or more files from the remote host. When using the host argument, the host will be used as default host for future transfers. If localname is specified, the file is stored locally as localname, otherwise the original filename is used. Note that it is not possible to download two files at a time, only one, three, or more than three files, at a time.

To specify an IPv6 numeric address for a host, wrap it using square brackets like ‘‘[3ffe:2900:e00c:ffee::1234]:file’’ to disambiguate the colons used in the IPv6 address from the colon separating the host and the filename.

mode transfer-mode

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

put file [[
host
:]remotename]
put
file1 file2 ... fileN [[
host
:]remote-directory]

Put a file or set of files to the remote host. When remotename is specified, the file is stored remotely as remotename, otherwise the original filename is used. If the remote-directory argument is used, the remote host is assumed to be a UNIX machine. To specify an IPv6 numeric address for a host, see the example under the get command.

quit

Exit tftp. An end of file also exits.

rexmt retransmission-timeout

Set the per-packet retransmission timeout, in seconds.

status

Show current status.

timeout total-transmission-timeout

Set the total transmission timeout, in seconds.

trace

Toggle packet tracing.

verbose

Toggle verbose mode.

HISTORY

The tftp command appeared in 4.3BSD.

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.

Files larger than 33488896 octets (65535 blocks) cannot be transferred without client and server supporting blocksize negotiation (RFC1783).

MidnightBSD 0.3 October 1, 2003 MidnightBSD 0.3