NAME
tftp - IPv4 Trivial File Transfer Protocol
client
SYNOPSIS
tftp [options...] [host]
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.
- -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 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.
- 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.
- 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.
SEE ALSO
(8).