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| 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 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¶
- -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 connections
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 literal 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 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 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
separator. 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 security.
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.
