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tftp(1)

tftp(1)                          User Commands                         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
       machine. The remote host and optional port may be specified on the com‐
       mand line, in which case tftp uses host as the  default  host,  and  if
       specified, port as the default port, for future transfers. See the con‐
       nect command below.

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

   Commands
       connect host-name [ port ]

           Set  the  host, and optionally port, for transfers. The TFTP proto‐
           col, 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 trans‐
           fers.  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 may be one  of  ascii  or
           binary. The default is ascii.


       put filename
       put localfile remotefile
       put filename1 filename2 ... filenameN remote-directory

           Transfer a file, or a 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  specified host becomes the default for future
           transfers. If the remote-directory form is used, the remote host is
           assumed to be running the UNIX system.

           The  host  can  be  a  host  name (see hosts(5)) or an IPv4 or IPv6
           address string (see inet(4P) or inet6(4P)).  Since  IPv6  addresses
           already  contain ":"s, the host should be enclosed in square brack‐
           ets when an IPv6 address is used. Otherwise, the  first  occurrence
           of  a  colon  will be interpreted as the separator between the host
           and the filename. For example,


             [1080::8:800:200c:417A]:myfile

           Files may be written only if they already exist  and  are  publicly
           writable. See in.tftpd(8).




       get filename
       get remotename localname
       get filename1 filename2 filename3 ... filenameN

           Get  a  file  or  set  of  files (three or more) from the specified
           remote 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  host  specified becomes the default for
           future transfers. See the put command regarding specifying a host.




       quit

           Exit tftp. An EOF also exits.


       verbose

           Toggle verbose mode.


       trace

           Toggle packet tracing.


       status

           Show current status.


       rexmtretransmission-timeout

           Set the per-packet retransmission timeout, in seconds.


       timeouttotal-transmission-timeout

           Set the total transmission timeout, in seconds.


       ascii

           Shorthand for mode ascii.


       binary

           Shorthand for mode binary.


       blksize transfer-blocksize

           The value of the transfer blocksize option to  negotiate  with  the
           server. A value of 0 disables the negotiation of this option.


       srexmt server-retransmission-timeout

           The  value of the retransmission timeout option to request that the
           server uses. A value of 0 disables the negotiation of this option.


       tsize

           A toggle that sends the transfer size  option  to  the  server.  By
           default,  the  option  is not sent. The transfer size option is not
           sent with a write request when the transfer-mode is ascii.


       ? [ command-name ... ]

           Print help information.


ATTRIBUTES
       See attributes(7) for descriptions of the following attributes:


       tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE  TYPEAT‐
       TRIBUTE VALUE _ Availabilityservice/network/tftp


SEE ALSO
       inet(4P), inet6(4P), hosts(5), attributes(7), in.tftpd(8)


       Malkin, G. and Harkin, A. RFC 2347, TFTP Option Extension. The Internet
       Society. May 1998


       Malkin, G. and Harkin, A. RFC 2348, TFTP Blocksize Option. The Internet
       Society. May 1998


       Malkin,  G. and Harkin, A. RFC 2349, TFTP Timeout Interval and Transfer
       Size Options. The Internet Society. May 1998


       Sollins, K.R. RFC 1350, The TFTP Protocol (Revision 2). Network Working
       Group. July 1992.

NOTES
       The default transfer-mode is ascii. This differs from pre-SunOS 4.0 and
       pre-4.3BSD systems, so explicit action must be taken when  transferring
       non-ASCII binary files such as executable commands.


       Because  there is no user-login or validation within the TFTP protocol,
       many remote sites restrict file access in various ways. Approved  meth‐
       ods  for file access are specific to each site, and therefore cannot be
       documented here.


       When using the get command to transfer multiple  files  from  a  remote
       host,  three  or  more files must be specified. If two files are speci‐
       fied, the second file is used as a local file.


       With the default block size of 512 octets and a 16-bit  block  counter,
       some   TFTP   implementations  might  have  problems  with  files  over
       33,553,919 octets (513 octets short  of  32MB)  in  size.  The  Solaris
       implementation can transfer files up to 4GB in size.


       By  default,  the  Solaris TFTP client does not enable the blocksize or
       transfer size options. Setting the blocksize option to a  higher  value
       is sometimes useful as a workaround when dealing with peers that have a
       32MB limit.



Oracle Solaris 11.4               14 May 2018                          tftp(1)
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