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 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. 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Redistributions in binary form must reproduce the above copyright 31 - notice, this list of conditions and the following disclaimer in the 32 - documentation and/or other materials provided with the distribution. 33 - 3. All advertising materials mentioning features or use of this software 34 - must display the following acknowledgement: 35 - This product includes software developed by the University of 36 - California, Berkeley and its contributors. 37 - 4. Neither the name of the University nor the names of its contributors 38 - may be used to endorse or promote products derived from this software 39 - without specific prior written permission. 40 - 41 - THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 42 - ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 - IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 - ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 45 - FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 - DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 - OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 - HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 - LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 - OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 - SUCH DAMAGE. 52--> 53<refentry> 54 55 <refentryinfo> 56 <date>Jun 30, 2000</date> 57 </refentryinfo> 58 59 <refmeta> 60 <refentrytitle>nslookup</refentrytitle> 61 <manvolnum>1</manvolnum> 62 <refmiscinfo>BIND9</refmiscinfo> 63 </refmeta> 64 65 <refnamediv> 66 <refname>nslookup</refname> 67 <refpurpose>query Internet name servers interactively</refpurpose> 68 </refnamediv> 69 70 <docinfo> 71 <copyright> 72 <year>2004</year> 73 <year>2005</year> 74 <year>2006</year> 75 <year>2007</year> 76 <year>2010</year> 77 <holder>Internet Systems Consortium, Inc. ("ISC")</holder> 78 </copyright> 79 </docinfo> 80 81 <refsynopsisdiv> 82 <cmdsynopsis> 83 <command>nslookup</command> 84 <arg><option>-option</option></arg> 85 <arg choice="opt">name | -</arg> 86 <arg choice="opt">server</arg> 87 </cmdsynopsis> 88 </refsynopsisdiv> 89 90 <refsect1> 91 <title>DESCRIPTION</title> 92 <para><command>Nslookup</command> 93 is a program to query Internet domain name servers. <command>Nslookup</command> 94 has two modes: interactive and non-interactive. Interactive mode allows 95 the user to query name servers for information about various hosts and 96 domains or to print a list of hosts in a domain. Non-interactive mode 97 is 98 used to print just the name and requested information for a host or 99 domain. 100 </para> 101 </refsect1> 102 103 <refsect1> 104 <title>ARGUMENTS</title> 105 <para> 106 Interactive mode is entered in the following cases: 107 <orderedlist numeration="loweralpha"> 108 <listitem> 109 <para> 110 when no arguments are given (the default name server will be used) 111 </para> 112 </listitem> 113 <listitem> 114 <para> 115 when the first argument is a hyphen (-) and the second argument is 116 the host name or Internet address of a name server. 117 </para> 118 </listitem> 119 </orderedlist> 120 </para> 121 122 <para> 123 Non-interactive mode is used when the name or Internet address of the 124 host to be looked up is given as the first argument. The optional second 125 argument specifies the host name or address of a name server. 126 </para> 127 128 <para> 129 Options can also be specified on the command line if they precede the 130 arguments and are prefixed with a hyphen. For example, to 131 change the default query type to host information, and the initial 132 timeout to 10 seconds, type: 133 <!-- <informalexample> produces bad nroff. --> 134 <programlisting> 135nslookup -query=hinfo -timeout=10 136</programlisting> 137 <!-- </informalexample> --> 138 </para> 139 140 </refsect1> 141 142 <refsect1> 143 <title>INTERACTIVE COMMANDS</title> 144 <variablelist> 145 <varlistentry> 146 <term><constant>host</constant> <optional>server</optional></term> 147 <listitem> 148 <para> 149 Look up information for host using the current default server or 150 using server, if specified. If host is an Internet address and 151 the query type is A or PTR, the name of the host is returned. 152 If host is a name and does not have a trailing period, the 153 search list is used to qualify the name. 154 </para> 155 156 <para> 157 To look up a host not in the current domain, append a period to 158 the name. 159 </para> 160 </listitem> 161 </varlistentry> 162 163 <varlistentry> 164 <term><constant>server</constant> <replaceable class="parameter">domain</replaceable></term> 165 <listitem> 166 <para/> 167 </listitem> 168 </varlistentry> 169 <varlistentry> 170 <term><constant>lserver</constant> <replaceable class="parameter">domain</replaceable></term> 171 <listitem> 172 <para> 173 Change the default server to <replaceable>domain</replaceable>; <constant>lserver</constant> uses the initial 174 server to look up information about <replaceable>domain</replaceable>, while <constant>server</constant> uses 175 the current default server. If an authoritative answer can't be 176 found, the names of servers that might have the answer are 177 returned. 178 </para> 179 </listitem> 180 </varlistentry> 181 182 <varlistentry> 183 <term><constant>root</constant></term> 184 <listitem> 185 <para> 186 not implemented 187 </para> 188 </listitem> 189 </varlistentry> 190 191 <varlistentry> 192 <term><constant>finger</constant></term> 193 <listitem> 194 <para> 195 not implemented 196 </para> 197 </listitem> 198 </varlistentry> 199 200 <varlistentry> 201 <term><constant>ls</constant></term> 202 <listitem> 203 <para> 204 not implemented 205 </para> 206 </listitem> 207 </varlistentry> 208 209 <varlistentry> 210 <term><constant>view</constant></term> 211 <listitem> 212 <para> 213 not implemented 214 </para> 215 </listitem> 216 </varlistentry> 217 218 <varlistentry> 219 <term><constant>help</constant></term> 220 <listitem> 221 <para> 222 not implemented 223 </para> 224 </listitem> 225 </varlistentry> 226 227 <varlistentry> 228 <term><constant>?</constant></term> 229 <listitem> 230 <para> 231 not implemented 232 </para> 233 </listitem> 234 </varlistentry> 235 236 <varlistentry> 237 <term><constant>exit</constant></term> 238 <listitem> 239 <para> 240 Exits the program. 241 </para> 242 </listitem> 243 </varlistentry> 244 245 <varlistentry> 246 <term><constant>set</constant> 247 <replaceable>keyword<optional>=value</optional></replaceable></term> 248 <listitem> 249 <para> 250 This command is used to change state information that affects 251 the lookups. Valid keywords are: 252 <variablelist> 253 <varlistentry> 254 <term><constant>all</constant></term> 255 <listitem> 256 <para> 257 Prints the current values of the frequently used 258 options to <command>set</command>. 259 Information about the current default 260 server and host is also printed. 261 </para> 262 </listitem> 263 </varlistentry> 264 265 <varlistentry> 266 <term><constant>class=</constant><replaceable>value</replaceable></term> 267 <listitem> 268 <para> 269 Change the query class to one of: 270 <variablelist> 271 <varlistentry> 272 <term><constant>IN</constant></term> 273 <listitem> 274 <para> 275 the Internet class 276 </para> 277 </listitem> 278 </varlistentry> 279 <varlistentry> 280 <term><constant>CH</constant></term> 281 <listitem> 282 <para> 283 the Chaos class 284 </para> 285 </listitem> 286 </varlistentry> 287 <varlistentry> 288 <term><constant>HS</constant></term> 289 <listitem> 290 <para> 291 the Hesiod class 292 </para> 293 </listitem> 294 </varlistentry> 295 <varlistentry> 296 <term><constant>ANY</constant></term> 297 <listitem> 298 <para> 299 wildcard 300 </para> 301 </listitem> 302 </varlistentry> 303 </variablelist> 304 The class specifies the protocol group of the information. 305 306 </para> 307 <para> 308 (Default = IN; abbreviation = cl) 309 </para> 310 </listitem> 311 </varlistentry> 312 313 <varlistentry> 314 <term><constant> 315 <replaceable><optional>no</optional></replaceable>debug</constant></term> 316 <listitem> 317 <para> 318 Turn on or off the display of the full response packet and 319 any intermediate response packets when searching. 320 </para> 321 <para> 322 (Default = nodebug; abbreviation = <optional>no</optional>deb) 323 </para> 324 </listitem> 325 </varlistentry> 326 327 <varlistentry> 328 <term><constant> 329 <replaceable><optional>no</optional></replaceable>d2</constant></term> 330 <listitem> 331 <para> 332 Turn debugging mode on or off. This displays more about 333 what nslookup is doing. 334 </para> 335 <para> 336 (Default = nod2) 337 </para> 338 </listitem> 339 </varlistentry> 340 341 <varlistentry> 342 <term><constant>domain=</constant><replaceable>name</replaceable></term> 343 <listitem> 344 <para> 345 Sets the search list to <replaceable>name</replaceable>. 346 </para> 347 </listitem> 348 </varlistentry> 349 350 <varlistentry> 351 <term><constant> 352 <replaceable><optional>no</optional></replaceable>search</constant></term> 353 <listitem> 354 <para> 355 If the lookup request contains at least one period but 356 doesn't end with a trailing period, append the domain 357 names in the domain search list to the request until an 358 answer is received. 359 </para> 360 <para> 361 (Default = search) 362 </para> 363 </listitem> 364 </varlistentry> 365 366 <varlistentry> 367 <term><constant>port=</constant><replaceable>value</replaceable></term> 368 <listitem> 369 <para> 370 Change the default TCP/UDP name server port to <replaceable>value</replaceable>. 371 </para> 372 <para> 373 (Default = 53; abbreviation = po) 374 </para> 375 </listitem> 376 </varlistentry> 377 378 <varlistentry> 379 <term><constant>querytype=</constant><replaceable>value</replaceable></term> 380 <listitem> 381 <para/> 382 </listitem> 383 </varlistentry> 384 385 <varlistentry> 386 <term><constant>type=</constant><replaceable>value</replaceable></term> 387 <listitem> 388 <para> 389 Change the type of the information query. 390 </para> 391 <para> 392 (Default = A; abbreviations = q, ty) 393 </para> 394 </listitem> 395 </varlistentry> 396 397 <varlistentry> 398 <term><constant> 399 <replaceable><optional>no</optional></replaceable>recurse</constant></term> 400 <listitem> 401 <para> 402 Tell the name server to query other servers if it does not 403 have the 404 information. 405 </para> 406 <para> 407 (Default = recurse; abbreviation = [no]rec) 408 </para> 409 </listitem> 410 </varlistentry> 411 412 <varlistentry> 413 <term><constant>retry=</constant><replaceable>number</replaceable></term> 414 <listitem> 415 <para> 416 Set the number of retries to number. 417 </para> 418 </listitem> 419 </varlistentry> 420 421 <varlistentry> 422 <term><constant>timeout=</constant><replaceable>number</replaceable></term> 423 <listitem> 424 <para> 425 Change the initial timeout interval for waiting for a 426 reply to number seconds. 427 </para> 428 </listitem> 429 </varlistentry> 430 431 <varlistentry> 432 <term><constant> 433 <replaceable><optional>no</optional></replaceable>vc</constant></term> 434 <listitem> 435 <para> 436 Always use a virtual circuit when sending requests to the 437 server. 438 </para> 439 <para> 440 (Default = novc) 441 </para> 442 </listitem> 443 </varlistentry> 444 445 <varlistentry> 446 <term><constant> 447 <replaceable><optional>no</optional></replaceable>fail</constant></term> 448 <listitem> 449 <para> 450 Try the next nameserver if a nameserver responds with 451 SERVFAIL or a referral (nofail) or terminate query 452 (fail) on such a response. 453 </para> 454 <para> 455 (Default = nofail) 456 </para> 457 </listitem> 458 </varlistentry> 459 460 </variablelist> 461 </para> 462 </listitem> 463 </varlistentry> 464 </variablelist> 465 </refsect1> 466 467 <refsect1> 468 <title>FILES</title> 469 <para><filename>/etc/resolv.conf</filename> 470 </para> 471 </refsect1> 472 473 <refsect1> 474 <title>SEE ALSO</title> 475 <para><citerefentry> 476 <refentrytitle>dig</refentrytitle><manvolnum>1</manvolnum> 477 </citerefentry>, 478 <citerefentry> 479 <refentrytitle>host</refentrytitle><manvolnum>1</manvolnum> 480 </citerefentry>, 481 <citerefentry> 482 <refentrytitle>named</refentrytitle><manvolnum>8</manvolnum> 483 </citerefentry>. 484 </para> 485 </refsect1> 486 487 <refsect1> 488 <title>Author</title> 489 <para> 490 Andrew Cherenson 491 </para> 492 </refsect1> 493</refentry><!-- 494 - Local variables: 495 - mode: sgml 496 - End: 497--> 498