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tftp(1)

HP-UX 11i Version 3: February 2007
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NAME

tftp — trivial file transfer program

SYNOPSIS

tftp [-B val] [-s] [-t val] [host [port]]

DESCRIPTION

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

Note

tftp now conforms to the RFCs: 2347, 2348, and 2349.

Options

tftp supports the following new options:

-B val

Set the block size option for data transfer, in octets. See blksize command for more information.

-s

Set the use of transfer size option. See tsize command for more information.

-t val

Set the retransmission timeout option, in seconds. See newrexmt command for more information.

Commands

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

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.

mode transfer-mode

Set the mode for transfers; transfer-mode can be one of ascii or binary (default is ascii).

put file

put localfile remotefile

put file1 file2 ... fileN remotedirectory

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 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-like machine.

put localfile [IPv6_address]:remotefile

To invoke the put command with an IPv6 address, the IPv6 address must be enclosed in a pair of square brackets ([ and ])

get filename

get remotename localname

get file1 file2 ... fileN

Get 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.

get [IPv6_address]:remotename localname

To invoke the get command with an IPv6 address, the IPv6 address must be enclosed in a pair of square brackets ([ and ])

quit

Exit tftp. Typing the end-of-file character also causes an exit.

verbose

Toggle verbose mode.

trace

Toggle packet tracing.

status

Show current status.

rexmt retransmission-timeout

Set the per-packet retransmission timeout, in seconds.

timeout total-transmission-timeout

Set the total transmission timeout, in seconds.

ascii

Shorthand for "mode ascii"

binary

Shorthand for "mode binary"

blksize val

Set the block size for data transfer. The client and the server communicate to arrive upon a block size that is suitable for use on the network medium. The valid range is 8 to 65464 octets. The default value is 512 octets.

newrexmt val

Set the retransmission timeout, in seconds. The client and the server communicate to arrive upon a retransmission timeout value. The valid range is 1 to 255 seconds. The default value is 5 seconds.

tsize

Toggles the use of transfer size. This option is implemented for binary mode transfers only. By default, this option is disabled. If this option is enabled, it allows the receiving side to determine the size of the file being transferred. When the get command is used in binary mode and the size of the file is greater than the free disk space, transfer will be aborted immediately. When the put command is used in binary mode, the size of the file will be sent to the server.

? [command-name...]

Print help information.

WARNINGS

Since there is no user-login or validation within the TFTP protocol, the remote site probably has some sort of file-access restrictions in place. The exact methods are specific to each site and are therefore difficult to document here.

AUTHOR

tftp was developed by the University of California, Berkeley.

SEE ALSO

tftpd(1M).

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