User Commands tftp(1)
NAME
tftp - trivial file transfer program
SYNOPSIS
tftp [ host [port]]
DESCRIPTION
tftp 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 and
optional port may be specified on the command line, in which
case tftp uses host as the default host, and if specified,
port as the default port, for future transfers. See the con-
nect command below.
USAGE
Once tftp is running, it issues the prompt tftp> and recog-
nizes the following commands:
Commands
connect host-name [ port ]
Set the host, and optionally port, for transfers. The
TFTP protocol, unlike the FTP protocol, does not main-
tain 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 com-
mands.
mode transfer-mode
Set the mode for transfers; transfer-mode may be one of
ascii or binary. The default is ascii.
put filename
put localfile remotefile
put filename1 filename2 ... filenameN remote-directory
Transfer a file, or a 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 specified host becomes the
default for future transfers. If the remote-directory
form is used, the remote host is assumed to be running
the UNIX system.
The host can be a host name (see hosts(4) or ipnodes(4))
or an IPv4 or IPv6 address string (see inet(7P) or
inet6(7P)). Since IPv6 addresses already contain ":"s,
the host should be enclosed in square brackets when an
IPv6 address is used. Otherwise, the first occurrence of
a colon will be interpreted as the separator between the
host and the filename. For example,
[1080::8:800:200c:417A]:myfile
Files may be written only if they already exist and are
publicly writable. See in.tftpd(1M).
get filename
get remotename localname
get filename1 filename2 filename3 ... filenameN
Get a file or set of files (three or more) from the
specified remote sources. source 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 last host specified becomes
the default for future transfers. See the put command
regarding specifying a host.
quit
Exit tftp. An EOF also exits.
verbose
Toggle verbose mode.
trace
Toggle packet tracing.
status
Show current status.
rexmt retransmission-timeout
Set the per-packet retransmission timeout, in seconds.
timeout total-transmission-timeout
Set the total transmission timeout, in seconds.
ascii
Shorthand for mode ascii.
binary
Shorthand for mode binary.
blksize transfer-blocksize
The value of the transfer blocksize option to negotiate
with the server. A value of 0 disables the negotiation
of this option.
srexmt server-retransmission-timeout
The value of the retransmission timeout option to
request that the server uses. A value of 0 disables the
negotiation of this option.
tsize
A toggle that sends the transfer size option to the
server. By default, the option is not sent. The transfer
size option is not sent with a write request when the
transfer-mode is ascii.
? [ command-name ... ]
Print help information.
ATTRIBUTES
See attributes(5) for descriptions of the following attri-
butes:
____________________________________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|_____________________________|_____________________________|
| Availability | SUNWtftp |
|_____________________________|_____________________________|
SEE ALSO
in.tftpd(1M), hosts(4), ipnodes(4),attributes(5),inet(7P),
inet6(7P)
Malkin, G. and Harkin, A. RFC 2347, TFTP Option Extension.
The Internet Society. May 1998
Malkin, G. and Harkin, A. RFC 2348, TFTP Blocksize Option.
The Internet Society. May 1998
Malkin, G. and Harkin, A. RFC 2349, TFTP Timeout Interval
and Transfer Size Options. The Internet Society. May 1998
Sollins, K.R. RFC 1350, The TFTP Protocol (Revision 2).
Network Working Group. July 1992.
NOTES
The default transfer-mode is ascii. This differs from pre-
SunOS 4.0 and pre-4.3BSD systems, so explicit action must be
taken when transferring non-ASCII binary files such as
executable commands.
Because there is no user-login or validation within the TFTP
protocol, many remote sites restrict file access in various
ways. Approved methods for file access are specific to each
site, and therefore cannot be documented here.
When using the get command to transfer multiple files from a
remote host, three or more files must be specified. If two
files are specified, the second file is used as a local
file.
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