TFTP(1) User's Manual TFTP(1)NAMEtftp - IPv4 Trivial File Transfer Protocol client
SYNOPSIStftp [ options... ] [host [port]] [-c command]
DESCRIPTIONtftp is a client for the 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 speci‐
fied on the command line, in which case tftp uses host as the default
host for future transfers (see the connect command below.)
OPTIONS-4 Connect with IPv4 only, even if IPv6 support was compiled in.
-6 Connect with IPv6 only, if compiled in.
-c command
Execute command as if it had been entered on the tftp prompt.
Must be specified last on the command line.
-l Default to literal mode. Used to avoid special processing of ':'
in a file name.
-m mode
Set the default transfer mode to mode. This is usually used
with -c.
-R port:port
Force the originating port number to be in the specified range
of port numbers.
-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. Enable lit‐
eral mode to prevent special treatment of the ':' character
(e.g. C:\dir\file).
literal
Toggle literal mode. When set, this mode prevents special
treatment of ':' in filenames.
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. Enable literal mode to prevent special treatment of the
':' character (e.g. C:\dir\file).
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 ALSOtftpd(8).
tftp-hpa 5.2 23 July 2008 TFTP(1)
