tftp

Trivial file transfer program

Syntax:

tftp [host]

Options:

host

The host to connect to.

Description:

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.

Commands:

Once tftp is running, it issues a prompt and accepts the following commands:

? command_name...

Print help information.

ascii

Shorthand for "mode ascii" (see mode below).

binary

Shorthand for "mode binary" (see mode below).

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 default.

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.

quit

Exit tftp. An end-of-file also exits.

rexmt retransmission_timeout

Set the per-packet retransmission timeout (specified in seconds).

status

Show the current status.

timeout total_transmission_timeout

Set the total transmission timeout (specified in seconds).

trace

Toggle packet tracing.

verbose

Toggle verbose mode.

Files:

The tftp utility requires the libsocket.so shared library.

Caveats:

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 these vary.

See also:

ftp, tftpd