TFTP(1)                    OpenBSD Reference Manual                    TFTP(1)

NAME
     tftp - trivial file transfer program

SYNOPSIS
     tftp [host [port]]

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 ma-
     chine.  The remote host and port may be specified on the command line, in
     which case tftp uses them as the default 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.

     blksize block-size
              Set the block size in bytes for one packet.  The default value
              is 512 bytes.  Valid values are 8 bytes - 65464 bytes.

     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 a file or set of files from the remote host.  When using the
              host argument, the host will be used as the default host for fu-
              ture 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 the same
              time; only one, three, or more than three files can be download-
              ed at the same time.

     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 using the
              host argument, the host will be used as the default host for fu-
              ture transfers.  If 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 as-
              sumed to be a UNIX machine.

              Note that files may only be written to if they already exist on
              the remote host and are publicly writable.  See tftpd(8) for
              further details.

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

     rexmt retransmission-timeout
              Set the per-packet retransmission timeout, in seconds.  The de-
              fault value is 5 seconds.  Valid values are 1 second - 255 sec-
              onds.

     status   Show current status.

     timeout total-transmission-timeout
              Set the total transmission timeout, in seconds.  The default
              value is 25 seconds.  Valid values are 1 second - 255 seconds.

     tout     Toggle the tout option.  This option devlivers the retransmis-
              sion timeout, which is set by rexmt, to the server, so the serv-
              er uses the same retransmission timeout as the client.

     tsize    Toggle the tsize option.  This option delivers the total size of
              the file to be transferred.  With this value given, the client
              or server can decide whether they are able to accept the file.

     trace    Toggle packet tracing.

     verbose  Toggle verbose mode.

SEE ALSO
     ftp(1), tftp-proxy(8), tftpd(8)

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.

OpenBSD 4.7                    October 22, 2009                              2
