contrib/bind-9.5.2/bin/dig/nslookup.html

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  16 <!-- $Id: nslookup.html,v 1.21.150.1 2009/07/11 01:43:27 tbox Exp $ -->
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  20 <title>nslookup</title>
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  23 <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="refentry" lang="en">
  24 <a name="id2476276"></a><div class="titlepage"></div>
  25 <div class="refnamediv">
  26 <h2>Name</h2>
  27 <p>nslookup &#8212; query Internet name servers interactively</p>
  28 </div>
  29 <div class="refsynopsisdiv">
  30 <h2>Synopsis</h2>
  31 <div class="cmdsynopsis"><p><code class="command">nslookup</code>  [<code class="option">-option</code>] [name | -] [server]</p></div>
  32 </div>
  33 <div class="refsect1" lang="en">
  34 <a name="id2543355"></a><h2>DESCRIPTION</h2>
  35 <p><span><strong class="command">Nslookup</strong></span>
  36       is a program to query Internet domain name servers.  <span><strong class="command">Nslookup</strong></span>
  37       has two modes: interactive and non-interactive.  Interactive mode allows
  38       the user to query name servers for information about various hosts and
  39       domains or to print a list of hosts in a domain.  Non-interactive mode
  40       is
  41       used to print just the name and requested information for a host or
  42       domain.
  43     </p>
  44 </div>
  45 <div class="refsect1" lang="en">
  46 <a name="id2543371"></a><h2>ARGUMENTS</h2>
  47 <p>
  48       Interactive mode is entered in the following cases:
  49       </p>
  50 <div class="orderedlist"><ol type="a">
  51 <li><p>
  52             when no arguments are given (the default name server will be used)
  53           </p></li>
  54 <li><p>
  55             when the first argument is a hyphen (-) and the second argument is
  56             the host name or Internet address of a name server.
  57           </p></li>
  58 </ol></div>
  59 <p>
  60     </p>
  61 <p>
  62       Non-interactive mode is used when the name or Internet address of the
  63       host to be looked up is given as the first argument. The optional second
  64       argument specifies the host name or address of a name server.
  65     </p>
  66 <p>
  67       Options can also be specified on the command line if they precede the
  68       arguments and are prefixed with a hyphen.  For example, to
  69       change the default query type to host information, and the initial
  70       timeout to 10 seconds, type:
  71       </p>
  72 <div class="informalexample"><pre class="programlisting">
  73 nslookup -query=hinfo  -timeout=10
  74 </pre></div>
  75 <p>
  76     </p>
  77 </div>
  78 <div class="refsect1" lang="en">
  79 <a name="id2543413"></a><h2>INTERACTIVE COMMANDS</h2>
  80 <div class="variablelist"><dl>
  81 <dt><span class="term"><code class="constant">host</code> [<span class="optional">server</span>]</span></dt>
  82 <dd>
  83 <p>
  84             Look up information for host using the current default server or
  85             using server, if specified.  If host is an Internet address and
  86             the query type is A or PTR, the name of the host is returned.
  87             If host is a name and does not have a trailing period, the
  88             search list is used to qualify the name.
  89           </p>
  90 <p>
  91             To look up a host not in the current domain, append a period to
  92             the name.
  93           </p>
  94 </dd>
  95 <dt><span class="term"><code class="constant">server</code> <em class="replaceable"><code>domain</code></em></span></dt>
  96 <dd><p></p></dd>
  97 <dt><span class="term"><code class="constant">lserver</code> <em class="replaceable"><code>domain</code></em></span></dt>
  98 <dd><p>
  99             Change the default server to <em class="replaceable"><code>domain</code></em>; <code class="constant">lserver</code> uses the initial
 100             server to look up information about <em class="replaceable"><code>domain</code></em>, while <code class="constant">server</code> uses
 101             the current default server.  If an authoritative answer can't be
 102             found, the names of servers that might have the answer are
 103             returned.
 104           </p></dd>
 105 <dt><span class="term"><code class="constant">root</code></span></dt>
 106 <dd><p>
 107             not implemented
 108           </p></dd>
 109 <dt><span class="term"><code class="constant">finger</code></span></dt>
 110 <dd><p>
 111             not implemented
 112           </p></dd>
 113 <dt><span class="term"><code class="constant">ls</code></span></dt>
 114 <dd><p>
 115             not implemented
 116           </p></dd>
 117 <dt><span class="term"><code class="constant">view</code></span></dt>
 118 <dd><p>
 119             not implemented
 120           </p></dd>
 121 <dt><span class="term"><code class="constant">help</code></span></dt>
 122 <dd><p>
 123             not implemented
 124           </p></dd>
 125 <dt><span class="term"><code class="constant">?</code></span></dt>
 126 <dd><p>
 127             not implemented
 128           </p></dd>
 129 <dt><span class="term"><code class="constant">exit</code></span></dt>
 130 <dd><p>
 131             Exits the program.
 132           </p></dd>
 133 <dt><span class="term"><code class="constant">set</code>
 134           <em class="replaceable"><code>keyword[<span class="optional">=value</span>]</code></em></span></dt>
 135 <dd>
 136 <p>
 137             This command is used to change state information that affects
 138             the lookups.  Valid keywords are:
 139             </p>
 140 <div class="variablelist"><dl>
 141 <dt><span class="term"><code class="constant">all</code></span></dt>
 142 <dd><p>
 143                     Prints the current values of the frequently used
 144                     options to <span><strong class="command">set</strong></span>.
 145                     Information about the  current default
 146                     server and host is also printed.
 147                   </p></dd>
 148 <dt><span class="term"><code class="constant">class=</code><em class="replaceable"><code>value</code></em></span></dt>
 149 <dd>
 150 <p>
 151                     Change the query class to one of:
 152                     </p>
 153 <div class="variablelist"><dl>
 154 <dt><span class="term"><code class="constant">IN</code></span></dt>
 155 <dd><p>
 156                             the Internet class
 157                           </p></dd>
 158 <dt><span class="term"><code class="constant">CH</code></span></dt>
 159 <dd><p>
 160                             the Chaos class
 161                           </p></dd>
 162 <dt><span class="term"><code class="constant">HS</code></span></dt>
 163 <dd><p>
 164                             the Hesiod class
 165                           </p></dd>
 166 <dt><span class="term"><code class="constant">ANY</code></span></dt>
 167 <dd><p>
 168                             wildcard
 169                           </p></dd>
 170 </dl></div>
 171 <p>
 172                     The class specifies the protocol group of the information.
 173
 174                   </p>
 175 <p>
 176                     (Default = IN; abbreviation = cl)
 177                   </p>
 178 </dd>
 179 <dt><span class="term"><code class="constant">
 180                     <em class="replaceable"><code>[<span class="optional">no</span>]</code></em>debug</code></span></dt>
 181 <dd>
 182 <p>
 183                     Turn on or off the display of the full response packet and
 184                     any intermediate response packets when searching.
 185                   </p>
 186 <p>
 187                     (Default = nodebug; abbreviation = [<span class="optional">no</span>]deb)
 188                   </p>
 189 </dd>
 190 <dt><span class="term"><code class="constant">
 191                     <em class="replaceable"><code>[<span class="optional">no</span>]</code></em>d2</code></span></dt>
 192 <dd>
 193 <p>
 194                     Turn debugging mode on or off.  This displays more about
 195                     what nslookup is doing.
 196                   </p>
 197 <p>
 198                     (Default = nod2)
 199                   </p>
 200 </dd>
 201 <dt><span class="term"><code class="constant">domain=</code><em class="replaceable"><code>name</code></em></span></dt>
 202 <dd><p>
 203                     Sets the search list to <em class="replaceable"><code>name</code></em>.
 204                   </p></dd>
 205 <dt><span class="term"><code class="constant">
 206                     <em class="replaceable"><code>[<span class="optional">no</span>]</code></em>search</code></span></dt>
 207 <dd>
 208 <p>
 209                     If the lookup request contains at least one period but
 210                     doesn't end with a trailing period, append the domain
 211                     names in the domain search list to the request until an
 212                     answer is received.
 213                   </p>
 214 <p>
 215                     (Default = search)
 216                   </p>
 217 </dd>
 218 <dt><span class="term"><code class="constant">port=</code><em class="replaceable"><code>value</code></em></span></dt>
 219 <dd>
 220 <p>
 221                     Change the default TCP/UDP name server port to <em class="replaceable"><code>value</code></em>.
 222                   </p>
 223 <p>
 224                     (Default = 53; abbreviation = po)
 225                   </p>
 226 </dd>
 227 <dt><span class="term"><code class="constant">querytype=</code><em class="replaceable"><code>value</code></em></span></dt>
 228 <dd><p></p></dd>
 229 <dt><span class="term"><code class="constant">type=</code><em class="replaceable"><code>value</code></em></span></dt>
 230 <dd>
 231 <p>
 232                     Change the type of the information query.
 233                   </p>
 234 <p>
 235                     (Default = A; abbreviations = q, ty)
 236                   </p>
 237 </dd>
 238 <dt><span class="term"><code class="constant">
 239                     <em class="replaceable"><code>[<span class="optional">no</span>]</code></em>recurse</code></span></dt>
 240 <dd>
 241 <p>
 242                     Tell the name server to query other servers if it does not
 243                     have the
 244                     information.
 245                   </p>
 246 <p>
 247                     (Default = recurse; abbreviation = [no]rec)
 248                   </p>
 249 </dd>
 250 <dt><span class="term"><code class="constant">retry=</code><em class="replaceable"><code>number</code></em></span></dt>
 251 <dd><p>
 252                     Set the number of retries to number.
 253                   </p></dd>
 254 <dt><span class="term"><code class="constant">timeout=</code><em class="replaceable"><code>number</code></em></span></dt>
 255 <dd><p>
 256                     Change the initial timeout interval for waiting for a
 257                     reply to number seconds.
 258                   </p></dd>
 259 <dt><span class="term"><code class="constant">
 260                     <em class="replaceable"><code>[<span class="optional">no</span>]</code></em>vc</code></span></dt>
 261 <dd>
 262 <p>
 263                     Always use a virtual circuit when sending requests to the
 264                     server.
 265                   </p>
 266 <p>
 267                     (Default = novc)
 268                   </p>
 269 </dd>
 270 <dt><span class="term"><code class="constant">
 271                     <em class="replaceable"><code>[<span class="optional">no</span>]</code></em>fail</code></span></dt>
 272 <dd>
 273 <p>
 274                     Try the next nameserver if a nameserver responds with
 275                     SERVFAIL or a referral (nofail) or terminate query
 276                     (fail) on such a response.
 277                   </p>
 278 <p>
 279                     (Default = nofail)
 280                   </p>
 281 </dd>
 282 </dl></div>
 283 <p>
 284           </p>
 285 </dd>
 286 </dl></div>
 287 </div>
 288 <div class="refsect1" lang="en">
 289 <a name="id2546279"></a><h2>FILES</h2>
 290 <p><code class="filename">/etc/resolv.conf</code>
 291     </p>
 292 </div>
 293 <div class="refsect1" lang="en">
 294 <a name="id2546291"></a><h2>SEE ALSO</h2>
 295 <p><span class="citerefentry"><span class="refentrytitle">dig</span>(1)</span>,
 296       <span class="citerefentry"><span class="refentrytitle">host</span>(1)</span>,
 297       <span class="citerefentry"><span class="refentrytitle">named</span>(8)</span>.
 298     </p>
 299 </div>
 300 <div class="refsect1" lang="en">
 301 <a name="id2546325"></a><h2>Author</h2>
 302 <p>
 303       Andrew Cherenson
 304     </p>
 305 </div>
 306 </div></body>
 307 </html>