tftp man page on FreeBSD

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TFTP(1)			  BSD 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 con‐
	      nections 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 dis‐
	      ambiguate 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, other‐
	      wise 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 dif‐
     ficult to document here.

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

BSD				October 1, 2003				   BSD
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