Trivial file transfer program
- The host to connect to.
The tftp utility is the user interface to the
Internet TFTP (Trivial File
Transfer Protocol), which lets you
transfer files to and from a remote machine. If you specify
a remote host on the command line, tftp uses that
host as the default host for future transfers (see the
connect command below).
The client host must have an entry in the /etc/services file
to provide tftp service.
Once tftp is running, it issues a prompt and
accepts the following commands:
- ? command_name...
- Print help information.
- Shorthand for "mode ascii" (see
- Shorthand for "mode binary" (see
- connect host [port]
- Set the host (and optionally port)
for transfers. Note that the TFTP protocol, unlike FTP,
doesn't maintain connections between transfers. That is, the
connect command doesn't actually create a
connection, but merely remembers what host to use for
transfers. You don't have to use the connect
command; you can specify the remote host as part of the
get or put commands.
- get file
get remotefile localfile
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 file at the same time. If the latter
form is used, the last hostname specified becomes the
- mode transfer_mode
- Set the mode for transfers to either ascii or
binary (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 file. If the latter form is used,
the hostname specified becomes the default. If the
remote_directory form is used, the remote host is
assumed to be a Unix box.
- Exit tftp. An end-of-file also exits.
- rexmt retransmission_timeout
- Set the per-packet retransmission timeout (specified in
- Show the current status.
- timeout total_transmission_timeout
- Set the total transmission timeout (specified in seconds).
- Toggle packet tracing.
- Toggle verbose mode.
The tftp utility requires the libsocket.so
Since there's no user-login or validation within the TFTP
protocol, the remote site should have some file-access
restrictions -- the exact methods for implementing