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.TH TFTP 1 "23 July 2008" "tftp-hpa @@VERSION@@" "User's Manual"
.SH NAME
.B tftp
\- IPv4 Trivial File Transfer Protocol client
.SH SYNOPSIS
.B tftp
[ \fIoptions...\fP ]
[\fIhost\fP [\fIport\fP]]
[\fB\-c\fP \fIcommand\fP]
.br
.SH DESCRIPTION
.B tftp
is a client for the Trivial file Transfer Protocol, which can be
used to transfer files to and from remote machines, including some
very minimalistic, usually embedded, systems.  The remote
.I host
may be specified on the command line, in which case
.B tftp
uses
.I host
as the default host for future transfers (see the
.B connect
command below.)
.SH OPTIONS
.TP
.B \-4
Connect with IPv4 only, even if IPv6 support was compiled in.
.TP
.B \-6
Connect with IPv6 only, if compiled in.
.TP
\fB\-c\fP \fIcommand\fP
Execute \fIcommand\fP as if it had been entered on the tftp prompt.
Must be specified last on the command line.
.TP
.B \-l
Default to literal mode. Used to avoid special processing of ':' in a
file name.
.TP
\fB\-m\fP \fImode\fP
Set the default transfer mode to \fImode\fP.  This is usually used with \-c.
.TP
\fB\-R\fP \fIport:port\fP
Force the originating port number to be in the specified range of port
numbers.
.TP
.B \-v
Default to verbose mode.
.TP
.B \-V
Print the version number and configuration to standard output, then
exit gracefully.
.SH COMMANDS
Once
.B tftp
is running, it issues the prompt
\f(CWtftp>\fP
and recognizes the following commands:
.TP
\fB?\fP \fIcommand-name...\fP
.TP
\fBhelp\fP \fIcommand-name...\fP
Print help information
.TP
.B ascii
Shorthand for
.BR "mode ascii" .
.TP
.B binary
Shorthand for
.BR "mode binary" .
.TP
\fBconnect\fP \fIhost [port]\fP
Set the
.I host
(and optionally
.IR port )
for transfers.  Note that the TFTP protocol, unlike the FTP protocol,
does not maintain connections between transfers; thus, the
.B 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
.B connect
command; the remote host can be specified as part of the
.B get
or
.B put
commands.
.TP
\fBget\fP \fIfile\fP
.sp -.6l
.TP
\fBget\fP \fIremotefile localfile\fP
.sp -.6l
.TP
\fBget\fP \fIfile1 file2 file3...\fP
Get a file or set of files from the specified sources.  A remote
filename can be in one of two forms: a plain filename on the remote
host, if the host has already been specified, or a string of the form
.I "host: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.  Enable
.B literal
mode to prevent special treatment of the ':' character (e.g. C:\\dir\\file).
.TP
.B literal
Toggle literal mode.  When set, this mode prevents special treatment of ':' in filenames. 
.TP
\fBmode\fP \fItransfer-mode\fP
Specify the mode for transfers;
.I transfer-mode
may be one of
.B ascii
(or
.BR netascii )
or
.B binary
(or
.BR octet .)
The default is
.BR ascii .
.TP
\fBput\fP \fIfile\fP
.sp -.6l
.TP
\fBput\fP \fIlocalfile remotefile\fP
.sp -.6l
.TP
\fBput\fP \fIfile1 file2 file3... remote-directory\fP
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
.I "host: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 system or another system using
.B /
as directory separator.  Enable
.B literal
mode to prevent special treatment of the ':' character (e.g. C:\\dir\\file).
.TP
.B quit
Exit
.BR tftp .
End-of-file will also exit.
.TP
\fBrexmt\fP \fIretransmission-timeout\fP
Set the per-packet retransmission timeout, in seconds.
.TP
.B status
Show current status.
.TP
\fBtimeout\fP \fItotal-transmission-timeout\fP
Set the total transmission timeout, in seconds.
.TP
.B trace
Toggle packet tracing (a debugging feature.)
.TP
.B verbose
Toggle verbose mode.
.SH "NOTES"
The TFTP protocol provides no provisions for authentication or
security.  Therefore, the remote server will probably implement some
kinds of access restriction or firewalling.  These access restrictions
are likely to be site- and server-specific.
.SH "AUTHOR"
This version of
.B tftp
is maintained by H. Peter Anvin <hpa@zytor.com>.  It was derived from,
but has substantially diverged from, an OpenBSD source base, with
added patches by Markus Gutschke and Gero Kulhman.
.SH "SEE ALSO"
.BR tftpd (8).