TFTP(1) BSD Reference Manual TFTP(1)
tftp - trivial file transfer program
tftp [host [port]]
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. The remote host and port may be specified on the command line, in which case tftp uses them as the default 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. ascii Shorthand for mode ascii. binary Shorthand for mode binary. connect host [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 [host:]file [localname] get [host1:]file1 [host2:]file2 ... [hostN:]fileN Get a file or set of files from the remote host. When using the host argument, the host will be used as the default host for fu- ture transfers. If localname is specified, the file is stored locally as localname, otherwise the original filename is used. Note that it is not possible to download two files at the same time; only one, three, or more than three files can be download- ed at the same time. mode transfer-mode Set the mode for transfers; transfer-mode may be one of ascii or binary. The default is ascii. put file [[host:]remotename] put file1 file2 ... fileN [[host:]remote-directory] Put a file or set of files to the remote host. When using the host argument, the host will be used as the default host for fu- ture transfers. If remotename is specified, the file is stored remotely as remotename, otherwise the original filename is used. If the remote-directory argument is used, the remote host is as- sumed to be a UNIX machine. Note that files may only be written to if they already exist on the remote host and are publicly writable. See tftpd(8) for further details. 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.
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 dif- ficult to document here. This implementation of tftp does not support blocksize negotiation (RFC 1783), so files larger than 33488896 octets (65535 blocks) cannot be transferred. MirOS BSD #10-current April 18, 1994 1
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