The
utility 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
may be specified on the command line, in which case
uses
host
as the default host for future transfers (see the
connect
command below).
COMMANDS
Once
is running, it issues the prompt
``tftp>
''
and recognizes the following commands:
? 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 one or more files from the remote host.
When using the
host
argument, the
host
will be used as default host for future transfers.
If
localname
is specified, the file is stored locally as
localname
otherwise the original filename is used.
Note that it is not possible to download two files at a time, only
one, three, or more than three files, at a time.
To specify an IPv6 numeric address for a host, wrap it using square
brackets like
``[3ffe:2900:e00c:ffee::1234] : file
''
to disambiguate the
colons used in the IPv6 address from the colon separating the host and
the filename.
mode transfer-mode
Set the mode for transfers;
transfer-mode
may be one of
ascii
or
binary
The default is
ascii
put file [[host : remotename
]
]
put file1 file2 ... fileN [[host : remote-directory
]
]
Put a file or set of files to the remote host.
When
remotename
is specified, the file is stored remotely as
remotename
otherwise the original filename is used.
If the
remote-directory
argument is used, the remote host is assumed to be a
UNIX
machine.
To specify an IPv6 numeric address for a
host
see the example under the
get
command.
quit
Exit
.
An end of file also exits.
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.
verbose
Toggle verbose mode.
HISTORY
The
command appeared in
BSD 4.3
BUGS
Because there is no user-login or validation within
the
TFTP
protocol, the remote site will probably have some
sort of file-access restrictions in place.
The
exact methods are specific to each site and therefore
difficult to document here.
Files larger than 33488896 octets (65535 blocks) cannot be transferred
without client and server supporting blocksize negotiation (RFC1783).
