tftp(1C) tftp(1C)NAME tftp - transfers files via the Trivial File Transfer Protocol (TFTP) SYNOPSIS tftp [host] ARGUMENTS host Causes tftp to use the specified remote host system (host) as the default host for future transfers (see the connect command below). DESCRIPTION tftp is the user interface to the Internet TFTP (Trivial File Transfer Protocol), which allows users to transfer files to and from a remote machine. Commands Once tftp is running, it issues the prompt tftp> and recognizes the following commands: connect host-name [port] Sets 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. mode transfer-mode Sets the mode for transfers; The transfer-mode argument may be one of ascii or binary. The default is ascii. put file put localfile remotefile put file... remote-directory Puts 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 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 machine. get filename get remotename localname get file... Gets a file or set of files from the specified sources. January 1992 1
tftp(1C) tftp(1C)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 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. quit Exits tftp. An end of file also exits. verbose Toggles verbose mode. trace Toggles packet tracing. status Shows current status. rexmt retransmission-timeout Sets the per-packet retransmission timeout, in seconds. timeout total-transmission-timeout Sets the total transmission timeout, in seconds. ascii Causes tftp to set the mode to ``mode ascii.'' binary Causes tftp to set the mode to ``mode binary.'' ? [command-name]... Prints help information. LIMITATIONS 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 /usr/bin/tftp Executable file 2 January 1992