tftp



TFTP(1)                          User’s Manual                         TFTP(1)




NAME

       tftp - IPv4 Trivial File Transfer Protocol client


SYNOPSIS

       tftp [ options... ] [host [port]] [-c command]


DESCRIPTION

       tftp is a client for the IPv4 Trivial file Transfer Protocol, which can
       be used to transfer files to and from remote machines,  including  some
       very  minimalistic,  usually embedded, systems.  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.)


OPTIONS

       -c command
              Execute  command  as  if it had been entered on the tftp prompt.
              Must be specified last on the command line.

       -m mode
              Set the default transfer mode to mode.   This  is  usually  used
              with -c.

       -v     Default to verbose mode.

       -V     Print  the  version number and configuration to standard output,
              then exit gracefully.


COMMANDS

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

       ? command-name...

       help 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 file
       get remotefile localfile
       get file1 file2 file3...
              Get a file or set of files from the specified sources.  A remote
              filename can be in one of two forms: a  plain  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.

       mode transfer-mode
              Specify the mode for transfers;  transfer-mode  may  be  one  of
              ascii (or netascii) or binary (or octet.)  The default is ascii.

       put file
       put localfile remotefile
       put file1 file2 file3... 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 file-
              name 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 system or another system using / as directory separa-
              tor.

       quit   Exit tftp.  End-of-file will also exit.

       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 (a debugging feature.)

       verbose
              Toggle verbose mode.


NOTES

       The TFTP protocol provides no provisions for  authentication  or  secu-
       rity.   Therefore, the remote server will probably implement some kinds
       of access restriction or firewalling.  These  access  restrictions  are
       likely to be site- and server-specific.


AUTHOR

       This  version  of tftp is maintained by H. Peter Anvin <hpa@zytor.com>.
       It was derived from, but has substantially diverged  from,  an  OpenBSD
       source base, with added patches by Markus Gutschke and Gero Kulhman.


SEE ALSO

       tftpd(8).



tftp-hpa 0.40                   2 February 2003                        TFTP(1)

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