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).
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 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 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.
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.