/contrib/bind9/bin/dig/nslookup.html

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    17. 

  17. <html>
    18. 

  18. <head>
    19. 

  19. <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
    20. 

  20. <title>nslookup</title>
    21. 

  21. <meta name="generator" content="DocBook XSL Stylesheets V1.71.1">
    22. 

  22. </head>
    23. 

  23. <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="refentry" lang="en">
    24. 

  24. <a name="id2476277"></a><div class="titlepage"></div>
    25. 

  25. <div class="refnamediv">
    26. 

  26. <h2>Name</h2>
    27. 

  27. <p>nslookup &#8212; query Internet name servers interactively</p>
    28. 

  28. </div>
    29. 

  29. <div class="refsynopsisdiv">
    30. 

  30. <h2>Synopsis</h2>
    31. 

  31. <div class="cmdsynopsis"><p><code class="command">nslookup</code>  [<code class="option">-option</code>] [name | -] [server]</p></div>
    32. 

  32. </div>
    33. 

  33. <div class="refsect1" lang="en">
    34. 

  34. <a name="id2543361"></a><h2>DESCRIPTION</h2>
    35. 

  35. <p><span><strong class="command">Nslookup</strong></span>
    36. 

  36.       is a program to query Internet domain name servers.  <span><strong class="command">Nslookup</strong></span>
    37. 

  37.       has two modes: interactive and non-interactive.  Interactive mode allows
    38. 

  38.       the user to query name servers for information about various hosts and
    39. 

  39.       domains or to print a list of hosts in a domain.  Non-interactive mode
    40. 

  40.       is
    41. 

  41.       used to print just the name and requested information for a host or
    42. 

  42.       domain.
    43. 

  43.     </p>
    44. 

  44. </div>
    45. 

  45. <div class="refsect1" lang="en">
    46. 

  46. <a name="id2543377"></a><h2>ARGUMENTS</h2>
    47. 

  47. <p>
    48. 

  48.       Interactive mode is entered in the following cases:
    49. 

  49.       </p>
    50. 

  50. <div class="orderedlist"><ol type="a">
    51. 

  51. <li><p>
    52. 

  52.             when no arguments are given (the default name server will be used)
    53. 

  53.           </p></li>
    54. 

  54. <li><p>
    55. 

  55.             when the first argument is a hyphen (-) and the second argument is
    56. 

  56.             the host name or Internet address of a name server.
    57. 

  57.           </p></li>
    58. 

  58. </ol></div>
    59. 

  59. <p>
    60. 

  60.     </p>
    61. 

  61. <p>
    62. 

  62.       Non-interactive mode is used when the name or Internet address of the
    63. 

  63.       host to be looked up is given as the first argument. The optional second
    64. 

  64.       argument specifies the host name or address of a name server.
    65. 

  65.     </p>
    66. 

  66. <p>
    67. 

  67.       Options can also be specified on the command line if they precede the
    68. 

  68.       arguments and are prefixed with a hyphen.  For example, to
    69. 

  69.       change the default query type to host information, and the initial
    70. 

  70.       timeout to 10 seconds, type:
    71. 

  71.       
    72. 

  72.         </p>
    73. 

  73. <pre class="programlisting">
    74. 

  74. nslookup -query=hinfo  -timeout=10
    75. 

  75. </pre>
    76. 

  76. <p>
    77. 

  77.       
    78. 

  78.     </p>
    79. 

  79. </div>
    80. 

  80. <div class="refsect1" lang="en">
    81. 

  81. <a name="id2543420"></a><h2>INTERACTIVE COMMANDS</h2>
    82. 

  82. <div class="variablelist"><dl>
    83. 

  83. <dt><span class="term"><code class="constant">host</code> [<span class="optional">server</span>]</span></dt>
    84. 

  84. <dd>
    85. 

  85. <p>
    86. 

  86.             Look up information for host using the current default server or
    87. 

  87.             using server, if specified.  If host is an Internet address and
    88. 

  88.             the query type is A or PTR, the name of the host is returned.
    89. 

  89.             If host is a name and does not have a trailing period, the
    90. 

  90.             search list is used to qualify the name.
    91. 

  91.           </p>
    92. 

  92. <p>
    93. 

  93.             To look up a host not in the current domain, append a period to
    94. 

  94.             the name.
    95. 

  95.           </p>
    96. 

  96. </dd>
    97. 

  97. <dt><span class="term"><code class="constant">server</code> <em class="replaceable"><code>domain</code></em></span></dt>
    98. 

  98. <dd><p></p></dd>
    99. 

  99. <dt><span class="term"><code class="constant">lserver</code> <em class="replaceable"><code>domain</code></em></span></dt>
    100. 

  100. <dd><p>
    101. 

  101.             Change the default server to <em class="replaceable"><code>domain</code></em>; <code class="constant">lserver</code> uses the initial
    102. 

  102.             server to look up information about <em class="replaceable"><code>domain</code></em>, while <code class="constant">server</code> uses
    103. 

  103.             the current default server.  If an authoritative answer can't be
    104. 

  104.             found, the names of servers that might have the answer are
    105. 

  105.             returned.
    106. 

  106.           </p></dd>
    107. 

  107. <dt><span class="term"><code class="constant">root</code></span></dt>
    108. 

  108. <dd><p>
    109. 

  109.             not implemented
    110. 

  110.           </p></dd>
    111. 

  111. <dt><span class="term"><code class="constant">finger</code></span></dt>
    112. 

  112. <dd><p>
    113. 

  113.             not implemented
    114. 

  114.           </p></dd>
    115. 

  115. <dt><span class="term"><code class="constant">ls</code></span></dt>
    116. 

  116. <dd><p>
    117. 

  117.             not implemented
    118. 

  118.           </p></dd>
    119. 

  119. <dt><span class="term"><code class="constant">view</code></span></dt>
    120. 

  120. <dd><p>
    121. 

  121.             not implemented
    122. 

  122.           </p></dd>
    123. 

  123. <dt><span class="term"><code class="constant">help</code></span></dt>
    124. 

  124. <dd><p>
    125. 

  125.             not implemented
    126. 

  126.           </p></dd>
    127. 

  127. <dt><span class="term"><code class="constant">?</code></span></dt>
    128. 

  128. <dd><p>
    129. 

  129.             not implemented
    130. 

  130.           </p></dd>
    131. 

  131. <dt><span class="term"><code class="constant">exit</code></span></dt>
    132. 

  132. <dd><p>
    133. 

  133.             Exits the program.
    134. 

  134.           </p></dd>
    135. 

  135. <dt><span class="term"><code class="constant">set</code>
    136. 

  136.           <em class="replaceable"><code>keyword[<span class="optional">=value</span>]</code></em></span></dt>
    137. 

  137. <dd>
    138. 

  138. <p>
    139. 

  139.             This command is used to change state information that affects
    140. 

  140.             the lookups.  Valid keywords are:
    141. 

  141.             </p>
    142. 

  142. <div class="variablelist"><dl>
    143. 

  143. <dt><span class="term"><code class="constant">all</code></span></dt>
    144. 

  144. <dd><p>
    145. 

  145.                     Prints the current values of the frequently used
    146. 

  146.                     options to <span><strong class="command">set</strong></span>.
    147. 

  147.                     Information about the  current default
    148. 

  148.                     server and host is also printed.
    149. 

  149.                   </p></dd>
    150. 

  150. <dt><span class="term"><code class="constant">class=</code><em class="replaceable"><code>value</code></em></span></dt>
    151. 

  151. <dd>
    152. 

  152. <p>
    153. 

  153.                     Change the query class to one of:
    154. 

  154.                     </p>
    155. 

  155. <div class="variablelist"><dl>
    156. 

  156. <dt><span class="term"><code class="constant">IN</code></span></dt>
    157. 

  157. <dd><p>
    158. 

  158.                             the Internet class
    159. 

  159.                           </p></dd>
    160. 

  160. <dt><span class="term"><code class="constant">CH</code></span></dt>
    161. 

  161. <dd><p>
    162. 

  162.                             the Chaos class
    163. 

  163.                           </p></dd>
    164. 

  164. <dt><span class="term"><code class="constant">HS</code></span></dt>
    165. 

  165. <dd><p>
    166. 

  166.                             the Hesiod class
    167. 

  167.                           </p></dd>
    168. 

  168. <dt><span class="term"><code class="constant">ANY</code></span></dt>
    169. 

  169. <dd><p>
    170. 

  170.                             wildcard
    171. 

  171.                           </p></dd>
    172. 

  172. </dl></div>
    173. 

  173. <p>
    174. 

  174.                     The class specifies the protocol group of the information.
    175. 

  175. 

  176.                   </p>
    177. 

  177. <p>
    178. 

  178.                     (Default = IN; abbreviation = cl)
    179. 

  179.                   </p>
    180. 

  180. </dd>
    181. 

  181. <dt><span class="term"><code class="constant">
    182. 

  182.                     <em class="replaceable"><code>[<span class="optional">no</span>]</code></em>debug</code></span></dt>
    183. 

  183. <dd>
    184. 

  184. <p>
    185. 

  185. 		    Turn on or off the display of the full response packet and
    186. 

  186. 		    any intermediate response packets when searching.
    187. 

  187.                   </p>
    188. 

  188. <p>
    189. 

  189.                     (Default = nodebug; abbreviation = [<span class="optional">no</span>]deb)
    190. 

  190.                   </p>
    191. 

  191. </dd>
    192. 

  192. <dt><span class="term"><code class="constant">
    193. 

  193.                     <em class="replaceable"><code>[<span class="optional">no</span>]</code></em>d2</code></span></dt>
    194. 

  194. <dd>
    195. 

  195. <p>
    196. 

  196.                     Turn debugging mode on or off.  This displays more about
    197. 

  197. 	            what nslookup is doing.
    198. 

  198.                   </p>
    199. 

  199. <p>
    200. 

  200.                     (Default = nod2)
    201. 

  201.                   </p>
    202. 

  202. </dd>
    203. 

  203. <dt><span class="term"><code class="constant">domain=</code><em class="replaceable"><code>name</code></em></span></dt>
    204. 

  204. <dd><p>
    205. 

  205.                     Sets the search list to <em class="replaceable"><code>name</code></em>.
    206. 

  206.                   </p></dd>
    207. 

  207. <dt><span class="term"><code class="constant">
    208. 

  208.                     <em class="replaceable"><code>[<span class="optional">no</span>]</code></em>search</code></span></dt>
    209. 

  209. <dd>
    210. 

  210. <p>
    211. 

  211.                     If the lookup request contains at least one period but
    212. 

  212.                     doesn't end with a trailing period, append the domain
    213. 

  213.                     names in the domain search list to the request until an
    214. 

  214.                     answer is received.
    215. 

  215.                   </p>
    216. 

  216. <p>
    217. 

  217.                     (Default = search)
    218. 

  218.                   </p>
    219. 

  219. </dd>
    220. 

  220. <dt><span class="term"><code class="constant">port=</code><em class="replaceable"><code>value</code></em></span></dt>
    221. 

  221. <dd>
    222. 

  222. <p>
    223. 

  223.                     Change the default TCP/UDP name server port to <em class="replaceable"><code>value</code></em>.
    224. 

  224.                   </p>
    225. 

  225. <p>
    226. 

  226.                     (Default = 53; abbreviation = po)
    227. 

  227.                   </p>
    228. 

  228. </dd>
    229. 

  229. <dt><span class="term"><code class="constant">querytype=</code><em class="replaceable"><code>value</code></em></span></dt>
    230. 

  230. <dd><p></p></dd>
    231. 

  231. <dt><span class="term"><code class="constant">type=</code><em class="replaceable"><code>value</code></em></span></dt>
    232. 

  232. <dd>
    233. 

  233. <p>
    234. 

  234.                     Change the type of the information query.
    235. 

  235.                   </p>
    236. 

  236. <p>
    237. 

  237.                     (Default = A; abbreviations = q, ty)
    238. 

  238.                   </p>
    239. 

  239. </dd>
    240. 

  240. <dt><span class="term"><code class="constant">
    241. 

  241.                     <em class="replaceable"><code>[<span class="optional">no</span>]</code></em>recurse</code></span></dt>
    242. 

  242. <dd>
    243. 

  243. <p>
    244. 

  244.                     Tell the name server to query other servers if it does not
    245. 

  245.                     have the
    246. 

  246.                     information.
    247. 

  247.                   </p>
    248. 

  248. <p>
    249. 

  249.                     (Default = recurse; abbreviation = [no]rec)
    250. 

  250.                   </p>
    251. 

  251. </dd>
    252. 

  252. <dt><span class="term"><code class="constant">retry=</code><em class="replaceable"><code>number</code></em></span></dt>
    253. 

  253. <dd><p>
    254. 

  254.                     Set the number of retries to number.
    255. 

  255.                   </p></dd>
    256. 

  256. <dt><span class="term"><code class="constant">timeout=</code><em class="replaceable"><code>number</code></em></span></dt>
    257. 

  257. <dd><p>
    258. 

  258.                     Change the initial timeout interval for waiting for a
    259. 

  259.                     reply to number seconds.
    260. 

  260.                   </p></dd>
    261. 

  261. <dt><span class="term"><code class="constant">
    262. 

  262.                     <em class="replaceable"><code>[<span class="optional">no</span>]</code></em>vc</code></span></dt>
    263. 

  263. <dd>
    264. 

  264. <p>
    265. 

  265.                     Always use a virtual circuit when sending requests to the
    266. 

  266.                     server.
    267. 

  267.                   </p>
    268. 

  268. <p>
    269. 

  269.                     (Default = novc)
    270. 

  270.                   </p>
    271. 

  271. </dd>
    272. 

  272. <dt><span class="term"><code class="constant">
    273. 

  273.                     <em class="replaceable"><code>[<span class="optional">no</span>]</code></em>fail</code></span></dt>
    274. 

  274. <dd>
    275. 

  275. <p>
    276. 

  276. 		    Try the next nameserver if a nameserver responds with
    277. 

  277. 		    SERVFAIL or a referral (nofail) or terminate query
    278. 

  278. 		    (fail) on such a response.
    279. 

  279. 		  </p>
    280. 

  280. <p>
    281. 

  281.                     (Default = nofail)
    282. 

  282.                   </p>
    283. 

  283. </dd>
    284. 

  284. </dl></div>
    285. 

  285. <p>
    286. 

  286.           </p>
    287. 

  287. </dd>
    288. 

  288. </dl></div>
    289. 

  289. </div>
    290. 

  290. <div class="refsect1" lang="en">
    291. 

  291. <a name="id2546286"></a><h2>FILES</h2>
    292. 

  292. <p><code class="filename">/etc/resolv.conf</code>
    293. 

  293.     </p>
    294. 

  294. </div>
    295. 

  295. <div class="refsect1" lang="en">
    296. 

  296. <a name="id2546298"></a><h2>SEE ALSO</h2>
    297. 

  297. <p><span class="citerefentry"><span class="refentrytitle">dig</span>(1)</span>,
    298. 

  298.       <span class="citerefentry"><span class="refentrytitle">host</span>(1)</span>,
    299. 

  299.       <span class="citerefentry"><span class="refentrytitle">named</span>(8)</span>.
    300. 

  300.     </p>
    301. 

  301. </div>
    302. 

  302. <div class="refsect1" lang="en">
    303. 

  303. <a name="id2546332"></a><h2>Author</h2>
    304. 

  304. <p>
    305. 

  305.       Andrew Cherenson
    306. 

  306.     </p>
    307. 

  307. </div>
    308. 

  308. </div></body>
    309. 

  309. </html>
    310.