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32 .\" @(#)tftp.1 8.2 (Berkeley) 4/18/94
40 .Nd trivial file transfer program
43 .Op Ar host Op Ar port
47 utility is the user interface to the Internet
49 (Trivial File Transfer Protocol),
50 which allows users to transfer files to and from a remote machine.
53 may be specified on the command line, in which case
57 as the default host for future transfers (see the
63 is running, it issues the prompt
65 and recognizes the following commands:
67 .Bl -tag -width verbose -compact
68 .It Cm \&? Ar command-name ...
69 Print help information.
72 Shorthand for "mode ascii"
75 Shorthand for "mode binary"
77 .It Cm connect Ar host Op Ar port
88 does not maintain connections between transfers; thus, the
90 command does not actually create a connection,
91 but merely remembers what host is to be used for transfers.
92 You do not have to use the
94 command; the remote host can be specified as part of the
100 .It Cm get Oo Ar host : Oc Ns Ar file Op Ar localname
102 .Oo Ar host1 : Oc Ns Ar file1
103 .Oo Ar host2 : Oc Ns Ar file2 ...
104 .Oo Ar hostN : Oc Ns Ar fileN
106 Get one or more files from the remote host.
111 will be used as default host for future transfers.
114 is specified, the file is stored locally as
116 otherwise the original filename is used.
117 Note that it is not possible to download two files at a time, only
118 one, three, or more than three files, at a time.
120 To specify an IPv6 numeric address for a host, wrap it using square
122 .Dq Li [3ffe:2900:e00c:ffee::1234] : Ns Ar file
124 colons used in the IPv6 address from the colon separating the host and
127 .It Cm mode Ar transfer-mode
128 Set the mode for transfers;
137 .It Cm put Ar file Op Oo Ar host : Oc Ns Ar remotename
138 .It Cm put Ar file1 file2 ... fileN Op Oo Ar host : Oc Ns Ar remote-directory
139 Put a file or set of files to the remote host.
142 is specified, the file is stored remotely as
144 otherwise the original filename is used.
147 argument is used, the remote host is assumed to be a
150 To specify an IPv6 numeric address for a
152 see the example under the
159 An end of file also exits.
161 .It Cm rexmt Ar retransmission-timeout
162 Set the per-packet retransmission timeout, in seconds.
167 .It Cm timeout Ar total-transmission-timeout
168 Set the total transmission timeout, in seconds.
171 Toggle packet tracing.
182 Because there is no user-login or validation within
185 protocol, the remote site will probably have some
186 sort of file-access restrictions in place.
188 exact methods are specific to each site and therefore
189 difficult to document here.
191 Files larger than 33488896 octets (65535 blocks) cannot be transferred
192 without client and server supporting blocksize negotiation (RFC1783).