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TFTP(1) General Commands Manual TFTP(1)

tftp — trivial file transfer program

tftp [host]

The tftp utility 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.

Shorthand for "mode ascii"

Shorthand for "mode binary"

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.

filename
 
remotename localname
 
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.

transfer-mode
Set the mode for transfers; transfer-mode may be one of ascii or binary. The default is ascii.

file
 
localfile remotefile
 
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. If you need to specify IPv6 numeric address to hosts, wrap them using square bracket like [hosts]:filename to disambiguate the colon.

Exit tftp. An end of file also exits.

retransmission-timeout
Set the per-packet retransmission timeout, in seconds.

Show current status.

total-transmission-timeout
Set the total transmission timeout, in seconds.

Toggle packet tracing.

Toggle verbose mode.

The tftp command appeared in 4.3BSD.

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.

Files larger than 33488896 octets (65535 blocks) cannot be transferred without client and server supporting blocksize negotiation (RFC 1783).

April 18, 1994 DragonFly-5.6.1