TFTP(1) BSD General Commands Manual TFTP(1)NAMEtftp — trivial file transfer program
SYNOPSIStftp [host]
DESCRIPTION
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).
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 con‐
nections 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 file‐
name 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.
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.
HISTORY
The tftp command appeared in 4.3BSD.
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 dif‐
ficult to document here.
Files larger than 33488896 octets (65535 blocks) cannot be transferred
without client and server supporting blocksize negotiation (RFC 1783).
BSD April 18, 1994 BSD
