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
-ccommand
Execute command as if it had been entered on the tftp prompt.
Must be specified last on the command line.
-mmode
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...
helpcommand-name...
Print help information
ascii
Shorthand for
mode ascii.
binary
Shorthand for
mode binary.
connecthost [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.
getfile
getremotefile localfile
getfile1 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.
modetransfer-mode
Specify the mode for transfers;
transfer-mode
may be one of
ascii
(or
netascii)
or
binary
(or
octet.)
The default is
ascii.
putfile
putlocalfile remotefile
putfile1 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.
rexmtretransmission-timeout
Set the per-packet retransmission timeout, in seconds.
status
Show current status.
timeouttotal-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.
