NAME¶
tftp —
trivial file transfer program
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 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).
COMMANDS¶
Once tftp 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-name [port]- Set the host (and optionally
port) for transfers. Note that the TFTP protocol,
unlike the FTP protocol, does not maintain connections betwen 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
filename-
get
remotename localname-
get
file1 file2 ... fileN- Get a file or set of files from the specified
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 hosts: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- Set the mode for transfers; transfer-mode may be one
of ascii or binary. The default is
ascii.
put
file-
put
localfile remotefile-
put
file1 file2 ... fileN 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
hosts: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 machine.
quit- Exit
tftp. 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.
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.
HISTORY¶
The tftp command appeared in
4.3BSD.
