1tftp(1) User Commands tftp(1)
2
6 tftp - trivial file transfer program
7
9 tftp [host [port]]
10
13 tftp is the user interface to the Internet TFTP (Trivial File Transfer
14 Protocol), which allows users to transfer files to and from a remote
15 machine. The remote host and optional port may be specified on the com‐
16 mand line, in which case tftp uses host as the default host, and if
17 specified, port as the default port, for future transfers. See the con‐
18 nect command below.
19
21 Once tftp is running, it issues the prompt tftp> and recognizes the
22 following commands:
23 Commands
25 connect host-name [ port ]
26 Set the host, and optionally port, for transfers. The TFTP proto‐
28 col, unlike the FTP protocol, does not maintain connections between
29 transfers; thus, the connect command does not actually create a
30 connection, but merely remembers what host is to be used for trans‐
31 fers. You do not have to use the connect command; the remote host
32 can be specified as part of the get or put commands.
33 mode transfer-mode
36 Set the mode for transfers; transfer-mode may be one of ascii or
38 binary. The default is ascii.
39 put filename
42 put localfile remotefile
43 put filename1 filename2 ... filenameN remote-directory
44 Transfer a file, or a set of files, to the specified remote file or
46 directory. The destination can be in one of two forms: a filename
47 on the remote host if the host has already been specified, or a
48 string of the form:
49 host:filename
51 to specify both a host and filename at the same time. If the latter
53 form is used, the specified host becomes the default for future
54 transfers. If the remote-directory form is used, the remote host is
55 assumed to be running the UNIX system.
56 The host can be a host name (see hosts(4)) or an IPv4 or IPv6
58 address string (see inet(7P) or inet6(7P)). Since IPv6 addresses
59 already contain ":"s, the host should be enclosed in square brack‐
60 ets when an IPv6 address is used. Otherwise, the first occurrence
61 of a colon will be interpreted as the separator between the host
62 and the filename. For example,
63 [1080::8:800:200c:417A]:myfile
65 Files may be written only if they already exist and are publicly
67 writable. See in.tftpd(1M).
68 get filename
71 get remotename localname
72 get filename1 filename2 filename3 ... filenameN
73 Get a file or set of files (three or more) from the specified
75 remote sources. source can be in one of two forms: a filename on
76 the remote host if the host has already been specified, or a string
77 of the form:
78 host:filename
80 to specify both a host and filename at the same time. If the latter
82 form is used, the last host specified becomes the default for
83 future transfers. See the put command regarding specifying a host.
84 quit
87 Exit tftp. An EOF also exits.
89 verbose
92 Toggle verbose mode.
94 trace
97 Toggle packet tracing.
99 status
102 Show current status.
104 rexmtretransmission-timeout
107 Set the per-packet retransmission timeout, in seconds.
109 timeouttotal-transmission-timeout
112 Set the total transmission timeout, in seconds.
114 ascii
117 Shorthand for mode ascii.
119 binary
122 Shorthand for mode binary.
124 blksize transfer-blocksize
127 The value of the transfer blocksize option to negotiate with the
129 server. A value of 0 disables the negotiation of this option.
130 srexmt server-retransmission-timeout
133 The value of the retransmission timeout option to request that the
135 server uses. A value of 0 disables the negotiation of this option.
136 tsize
139 A toggle that sends the transfer size option to the server. By
141 default, the option is not sent. The transfer size option is not
142 sent with a write request when the transfer-mode is ascii.
143 ? [ command-name ... ]
146 Print help information.
148
151 See attributes(5) for descriptions of the following attributes:
152 ┌─────────────────────────────┬─────────────────────────────┐
157 │ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
158 ├─────────────────────────────┼─────────────────────────────┤
159 │Availability │SUNWtftp │
160 └─────────────────────────────┴─────────────────────────────┘
161
163 in.tftpd(1M), hosts(4), attributes(5),inet(7P), inet6(7P)
164 Malkin, G. and Harkin, A. RFC 2347, TFTP Option Extension. The Internet
167 Society. May 1998
168 Malkin, G. and Harkin, A. RFC 2348, TFTP Blocksize Option. The Internet
171 Society. May 1998
172 Malkin, G. and Harkin, A. RFC 2349, TFTP Timeout Interval and Transfer
175 Size Options. The Internet Society. May 1998
176 Sollins, K.R. RFC 1350, The TFTP Protocol (Revision 2). Network Working
179 Group. July 1992.
180
182 The default transfer-mode is ascii. This differs from pre-SunOS 4.0 and
183 pre-4.3BSD systems, so explicit action must be taken when transferring
184 non-ASCII binary files such as executable commands.
185 Because there is no user-login or validation within the TFTP protocol,
188 many remote sites restrict file access in various ways. Approved meth‐
189 ods for file access are specific to each site, and therefore cannot be
190 documented here.
191 When using the get command to transfer multiple files from a remote
194 host, three or more files must be specified. If two files are speci‐
195 fied, the second file is used as a local file.
196 With the default block size of 512 octets and a 16-bit block counter,
199 some TFTP implementations might have problems with files over
200 33,553,919 octets (513 octets short of 32MB) in size. The Solaris
201 implementation can transfer files up to 4GB in size.
202 By default, the Solaris TFTP client does not enable the blocksize or
205 transfer size options. Setting the blocksize option to a higher value
206 is sometimes useful as a workaround when dealing with peers that have a
207 32MB limit.
208SunOS 5.11 7 May 2007 tftp(1)