1<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" 2 "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" 3 [<!ENTITY mdash "—">]> 4<!-- 5 - Copyright (C) 2004-2007, 2010, 2013, 2014 Internet Systems Consortium, Inc. ("ISC") 6 - 7 - Permission to use, copy, modify, and/or distribute this software for any 8 - purpose with or without fee is hereby granted, provided that the above 9 - copyright notice and this permission notice appear in all copies. 10 - 11 - THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 12 - REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 13 - AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 14 - INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 15 - LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 16 - OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 17 - PERFORMANCE OF THIS SOFTWARE. 18--> 19 20<!-- 21 - Copyright (c) 1985, 1989 22 - The Regents of the University of California. All rights reserved. 23 - 24 - Redistribution and use in source and binary forms, with or without 25 - modification, are permitted provided that the following conditions 26 - are met: 27 - 1. Redistributions of source code must retain the above copyright 28 - notice, this list of conditions and the following disclaimer. 29 - 2. Redistributions in binary form must reproduce the above copyright 30 - notice, this list of conditions and the following disclaimer in the 31 - documentation and/or other materials provided with the distribution. 32 - 3. Neither the name of the University nor the names of its contributors 33 - may be used to endorse or promote products derived from this software 34 - without specific prior written permission. 35 - 36 - THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 37 - ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 38 - IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 39 - ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 40 - FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 41 - DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 42 - OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 43 - HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 44 - LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 45 - OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 46 - SUCH DAMAGE. 47--> 48<refentry> 49 50 <refentryinfo> 51 <date>January 24, 2014</date> 52 </refentryinfo> 53 54 <refmeta> 55 <refentrytitle>nslookup</refentrytitle> 56 <manvolnum>1</manvolnum> 57 <refmiscinfo>BIND9</refmiscinfo> 58 </refmeta> 59 60 <refnamediv> 61 <refname>nslookup</refname> 62 <refpurpose>query Internet name servers interactively</refpurpose> 63 </refnamediv> 64 65 <docinfo> 66 <copyright> 67 <year>2004</year> 68 <year>2005</year> 69 <year>2006</year> 70 <year>2007</year> 71 <year>2010</year> 72 <year>2013</year> 73 <year>2014</year> 74 <holder>Internet Systems Consortium, Inc. ("ISC")</holder> 75 </copyright> 76 </docinfo> 77 78 <refsynopsisdiv> 79 <cmdsynopsis> 80 <command>nslookup</command> 81 <arg><option>-option</option></arg> 82 <arg choice="opt">name | -</arg> 83 <arg choice="opt">server</arg> 84 </cmdsynopsis> 85 </refsynopsisdiv> 86 87 <refsect1> 88 <title>DESCRIPTION</title> 89 <para><command>Nslookup</command> 90 is a program to query Internet domain name servers. <command>Nslookup</command> 91 has two modes: interactive and non-interactive. Interactive mode allows 92 the user to query name servers for information about various hosts and 93 domains or to print a list of hosts in a domain. Non-interactive mode 94 is 95 used to print just the name and requested information for a host or 96 domain. 97 </para> 98 </refsect1> 99 100 <refsect1> 101 <title>ARGUMENTS</title> 102 <para> 103 Interactive mode is entered in the following cases: 104 <orderedlist numeration="loweralpha"> 105 <listitem> 106 <para> 107 when no arguments are given (the default name server will be used) 108 </para> 109 </listitem> 110 <listitem> 111 <para> 112 when the first argument is a hyphen (-) and the second argument is 113 the host name or Internet address of a name server. 114 </para> 115 </listitem> 116 </orderedlist> 117 </para> 118 119 <para> 120 Non-interactive mode is used when the name or Internet address of the 121 host to be looked up is given as the first argument. The optional second 122 argument specifies the host name or address of a name server. 123 </para> 124 125 <para> 126 Options can also be specified on the command line if they precede the 127 arguments and are prefixed with a hyphen. For example, to 128 change the default query type to host information, and the initial 129 timeout to 10 seconds, type: 130 <!-- <informalexample> produces bad nroff. --> 131 <programlisting> 132nslookup -query=hinfo -timeout=10 133</programlisting> 134 <!-- </informalexample> --> 135 </para> 136 <para> 137 The <option>-version</option> option causes 138 <command>nslookup</command> to print the version 139 number and immediately exits. 140 </para> 141 142 </refsect1> 143 144 <refsect1> 145 <title>INTERACTIVE COMMANDS</title> 146 <variablelist> 147 <varlistentry> 148 <term><constant>host</constant> <optional>server</optional></term> 149 <listitem> 150 <para> 151 Look up information for host using the current default server or 152 using server, if specified. If host is an Internet address and 153 the query type is A or PTR, the name of the host is returned. 154 If host is a name and does not have a trailing period, the 155 search list is used to qualify the name. 156 </para> 157 158 <para> 159 To look up a host not in the current domain, append a period to 160 the name. 161 </para> 162 </listitem> 163 </varlistentry> 164 165 <varlistentry> 166 <term><constant>server</constant> <replaceable class="parameter">domain</replaceable></term> 167 <listitem> 168 <para/> 169 </listitem> 170 </varlistentry> 171 <varlistentry> 172 <term><constant>lserver</constant> <replaceable class="parameter">domain</replaceable></term> 173 <listitem> 174 <para> 175 Change the default server to <replaceable>domain</replaceable>; <constant>lserver</constant> uses the initial 176 server to look up information about <replaceable>domain</replaceable>, while <constant>server</constant> uses 177 the current default server. If an authoritative answer can't be 178 found, the names of servers that might have the answer are 179 returned. 180 </para> 181 </listitem> 182 </varlistentry> 183 184 <varlistentry> 185 <term><constant>root</constant></term> 186 <listitem> 187 <para> 188 not implemented 189 </para> 190 </listitem> 191 </varlistentry> 192 193 <varlistentry> 194 <term><constant>finger</constant></term> 195 <listitem> 196 <para> 197 not implemented 198 </para> 199 </listitem> 200 </varlistentry> 201 202 <varlistentry> 203 <term><constant>ls</constant></term> 204 <listitem> 205 <para> 206 not implemented 207 </para> 208 </listitem> 209 </varlistentry> 210 211 <varlistentry> 212 <term><constant>view</constant></term> 213 <listitem> 214 <para> 215 not implemented 216 </para> 217 </listitem> 218 </varlistentry> 219 220 <varlistentry> 221 <term><constant>help</constant></term> 222 <listitem> 223 <para> 224 not implemented 225 </para> 226 </listitem> 227 </varlistentry> 228 229 <varlistentry> 230 <term><constant>?</constant></term> 231 <listitem> 232 <para> 233 not implemented 234 </para> 235 </listitem> 236 </varlistentry> 237 238 <varlistentry> 239 <term><constant>exit</constant></term> 240 <listitem> 241 <para> 242 Exits the program. 243 </para> 244 </listitem> 245 </varlistentry> 246 247 <varlistentry> 248 <term><constant>set</constant> 249 <replaceable>keyword<optional>=value</optional></replaceable></term> 250 <listitem> 251 <para> 252 This command is used to change state information that affects 253 the lookups. Valid keywords are: 254 <variablelist> 255 <varlistentry> 256 <term><constant>all</constant></term> 257 <listitem> 258 <para> 259 Prints the current values of the frequently used 260 options to <command>set</command>. 261 Information about the current default 262 server and host is also printed. 263 </para> 264 </listitem> 265 </varlistentry> 266 267 <varlistentry> 268 <term><constant>class=</constant><replaceable>value</replaceable></term> 269 <listitem> 270 <para> 271 Change the query class to one of: 272 <variablelist> 273 <varlistentry> 274 <term><constant>IN</constant></term> 275 <listitem> 276 <para> 277 the Internet class 278 </para> 279 </listitem> 280 </varlistentry> 281 <varlistentry> 282 <term><constant>CH</constant></term> 283 <listitem> 284 <para> 285 the Chaos class 286 </para> 287 </listitem> 288 </varlistentry> 289 <varlistentry> 290 <term><constant>HS</constant></term> 291 <listitem> 292 <para> 293 the Hesiod class 294 </para> 295 </listitem> 296 </varlistentry> 297 <varlistentry> 298 <term><constant>ANY</constant></term> 299 <listitem> 300 <para> 301 wildcard 302 </para> 303 </listitem> 304 </varlistentry> 305 </variablelist> 306 The class specifies the protocol group of the information. 307 308 </para> 309 <para> 310 (Default = IN; abbreviation = cl) 311 </para> 312 </listitem> 313 </varlistentry> 314 315 <varlistentry> 316 <term><constant> 317 <replaceable><optional>no</optional></replaceable>debug</constant></term> 318 <listitem> 319 <para> 320 Turn on or off the display of the full response packet and 321 any intermediate response packets when searching. 322 </para> 323 <para> 324 (Default = nodebug; abbreviation = <optional>no</optional>deb) 325 </para> 326 </listitem> 327 </varlistentry> 328 329 <varlistentry> 330 <term><constant> 331 <replaceable><optional>no</optional></replaceable>d2</constant></term> 332 <listitem> 333 <para> 334 Turn debugging mode on or off. This displays more about 335 what nslookup is doing. 336 </para> 337 <para> 338 (Default = nod2) 339 </para> 340 </listitem> 341 </varlistentry> 342 343 <varlistentry> 344 <term><constant>domain=</constant><replaceable>name</replaceable></term> 345 <listitem> 346 <para> 347 Sets the search list to <replaceable>name</replaceable>. 348 </para> 349 </listitem> 350 </varlistentry> 351 352 <varlistentry> 353 <term><constant> 354 <replaceable><optional>no</optional></replaceable>search</constant></term> 355 <listitem> 356 <para> 357 If the lookup request contains at least one period but 358 doesn't end with a trailing period, append the domain 359 names in the domain search list to the request until an 360 answer is received. 361 </para> 362 <para> 363 (Default = search) 364 </para> 365 </listitem> 366 </varlistentry> 367 368 <varlistentry> 369 <term><constant>port=</constant><replaceable>value</replaceable></term> 370 <listitem> 371 <para> 372 Change the default TCP/UDP name server port to <replaceable>value</replaceable>. 373 </para> 374 <para> 375 (Default = 53; abbreviation = po) 376 </para> 377 </listitem> 378 </varlistentry> 379 380 <varlistentry> 381 <term><constant>querytype=</constant><replaceable>value</replaceable></term> 382 <listitem> 383 <para/> 384 </listitem> 385 </varlistentry> 386 387 <varlistentry> 388 <term><constant>type=</constant><replaceable>value</replaceable></term> 389 <listitem> 390 <para> 391 Change the type of the information query. 392 </para> 393 <para> 394 (Default = A; abbreviations = q, ty) 395 </para> 396 </listitem> 397 </varlistentry> 398 399 <varlistentry> 400 <term><constant> 401 <replaceable><optional>no</optional></replaceable>recurse</constant></term> 402 <listitem> 403 <para> 404 Tell the name server to query other servers if it does not 405 have the 406 information. 407 </para> 408 <para> 409 (Default = recurse; abbreviation = [no]rec) 410 </para> 411 </listitem> 412 </varlistentry> 413 414 <varlistentry> 415 <term><constant>ndots=</constant><replaceable>number</replaceable></term> 416 <listitem> 417 <para> 418 Set the number of dots (label separators) in a domain 419 that will disable searching. Absolute names always 420 stop searching. 421 </para> 422 </listitem> 423 </varlistentry> 424 425 <varlistentry> 426 <term><constant>retry=</constant><replaceable>number</replaceable></term> 427 <listitem> 428 <para> 429 Set the number of retries to number. 430 </para> 431 </listitem> 432 </varlistentry> 433 434 <varlistentry> 435 <term><constant>timeout=</constant><replaceable>number</replaceable></term> 436 <listitem> 437 <para> 438 Change the initial timeout interval for waiting for a 439 reply to number seconds. 440 </para> 441 </listitem> 442 </varlistentry> 443 444 <varlistentry> 445 <term><constant> 446 <replaceable><optional>no</optional></replaceable>vc</constant></term> 447 <listitem> 448 <para> 449 Always use a virtual circuit when sending requests to the 450 server. 451 </para> 452 <para> 453 (Default = novc) 454 </para> 455 </listitem> 456 </varlistentry> 457 458 <varlistentry> 459 <term><constant> 460 <replaceable><optional>no</optional></replaceable>fail</constant></term> 461 <listitem> 462 <para> 463 Try the next nameserver if a nameserver responds with 464 SERVFAIL or a referral (nofail) or terminate query 465 (fail) on such a response. 466 </para> 467 <para> 468 (Default = nofail) 469 </para> 470 </listitem> 471 </varlistentry> 472 473 </variablelist> 474 </para> 475 </listitem> 476 </varlistentry> 477 </variablelist> 478 </refsect1> 479 480 <refsect1> 481 <title>FILES</title> 482 <para><filename>/etc/resolv.conf</filename> 483 </para> 484 </refsect1> 485 486 <refsect1> 487 <title>SEE ALSO</title> 488 <para><citerefentry> 489 <refentrytitle>dig</refentrytitle><manvolnum>1</manvolnum> 490 </citerefentry>, 491 <citerefentry> 492 <refentrytitle>host</refentrytitle><manvolnum>1</manvolnum> 493 </citerefentry>, 494 <citerefentry> 495 <refentrytitle>named</refentrytitle><manvolnum>8</manvolnum> 496 </citerefentry>. 497 </para> 498 </refsect1> 499 500 <refsect1> 501 <title>Author</title> 502 <para> 503 Andrew Cherenson 504 </para> 505 </refsect1> 506</refentry><!-- 507 - Local variables: 508 - mode: sgml 509 - End: 510--> 511