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11e9368a226272085c337e9e74b79808c16fbdbaTinderbox User<!--
75c0816e8295e180f4bc7f10db3d0d880383bc1cMark Andrews - Copyright (C) 2000-2015 Internet Systems Consortium, Inc. ("ISC")
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein -
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60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein - License, v. 2.0. If a copy of the MPL was not distributed with this
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14a656f94b1fd0ababd84a772228dfa52276ba15Evan Hunt<tr><th colspan="3" align="center">nslookup</th></tr>
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60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<hr>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein</div>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<div class="refentry">
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<a name="man.nslookup"></a><div class="titlepage"></div>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<div class="refnamediv">
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<h2>Name</h2>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<p>nslookup &#8212; query Internet name servers interactively</p>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein</div>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<div class="refsynopsisdiv">
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<h2>Synopsis</h2>
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User<div class="cmdsynopsis"><p><code class="command">nslookup</code> [<code class="option">-option</code>] [name | -] [server]</p></div>
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User</div>
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User<div class="refsection">
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<a name="id-1.14.6.7"></a><h2>DESCRIPTION</h2>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<p><span class="command"><strong>Nslookup</strong></span>
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User is a program to query Internet domain name servers. <span class="command"><strong>Nslookup</strong></span>
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User has two modes: interactive and non-interactive. Interactive mode allows
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User the user to query name servers for information about various hosts and
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User domains or to print a list of hosts in a domain. Non-interactive mode
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User is
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein used to print just the name and requested information for a host or
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein domain.
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User </p>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein</div>
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User<div class="refsection">
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User<a name="id-1.14.6.8"></a><h2>ARGUMENTS</h2>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<p>
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User Interactive mode is entered in the following cases:
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User </p>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<div class="orderedlist"><ol class="orderedlist" type="a">
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<li class="listitem"><p>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein when no arguments are given (the default name server will be used)
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein </p></li>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<li class="listitem"><p>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein when the first argument is a hyphen (-) and the second argument is
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User the host name or Internet address of a name server.
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User </p></li>
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User</ol></div>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<p>
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User </p>
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User<p>
48abcd3eb789fdd24a2e0a6155b25e6979a39ae0Mark Andrews Non-interactive mode is used when the name or Internet address of the
48abcd3eb789fdd24a2e0a6155b25e6979a39ae0Mark Andrews host to be looked up is given as the first argument. The optional second
48abcd3eb789fdd24a2e0a6155b25e6979a39ae0Mark Andrews argument specifies the host name or address of a name server.
48abcd3eb789fdd24a2e0a6155b25e6979a39ae0Mark Andrews </p>
48abcd3eb789fdd24a2e0a6155b25e6979a39ae0Mark Andrews<p>
48abcd3eb789fdd24a2e0a6155b25e6979a39ae0Mark Andrews Options can also be specified on the command line if they precede the
48abcd3eb789fdd24a2e0a6155b25e6979a39ae0Mark Andrews arguments and are prefixed with a hyphen. For example, to
48abcd3eb789fdd24a2e0a6155b25e6979a39ae0Mark Andrews change the default query type to host information, and the initial
48abcd3eb789fdd24a2e0a6155b25e6979a39ae0Mark Andrews timeout to 10 seconds, type:
48abcd3eb789fdd24a2e0a6155b25e6979a39ae0Mark Andrews
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein </p>
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User<pre class="programlisting">
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austeinnslookup -query=hinfo -timeout=10
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein</pre>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<p>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User </p>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<p>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein The <code class="option">-version</code> option causes
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein <span class="command"><strong>nslookup</strong></span> to print the version
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein number and immediately exits.
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein </p>
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User</div>
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User<div class="refsection">
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<a name="id-1.14.6.9"></a><h2>INTERACTIVE COMMANDS</h2>
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User<div class="variablelist"><dl class="variablelist">
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User<dt><span class="term"><code class="constant">host</code> [<span class="optional">server</span>]</span></dt>
5a4557e8de2951a2796676b5ec4b6a90caa5be14Mark Andrews<dd>
71c66a876ecca77923638d3f94cc0783152b2f03Mark Andrews<p>
71c66a876ecca77923638d3f94cc0783152b2f03Mark Andrews Look up information for host using the current default server or
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein using server, if specified. If host is an Internet address and
71c66a876ecca77923638d3f94cc0783152b2f03Mark Andrews the query type is A or PTR, the name of the host is returned.
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein If host is a name and does not have a trailing period, the
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein search list is used to qualify the name.
71c66a876ecca77923638d3f94cc0783152b2f03Mark Andrews </p>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<p>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein To look up a host not in the current domain, append a period to
71c66a876ecca77923638d3f94cc0783152b2f03Mark Andrews the name.
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein </p>
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User</dd>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<dt><span class="term"><code class="constant">server</code> <em class="replaceable"><code>domain</code></em></span></dt>
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User<dd><p></p></dd>
71c66a876ecca77923638d3f94cc0783152b2f03Mark Andrews<dt><span class="term"><code class="constant">lserver</code> <em class="replaceable"><code>domain</code></em></span></dt>
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User<dd><p>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein Change the default server to <em class="replaceable"><code>domain</code></em>; <code class="constant">lserver</code> uses the initial
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein server to look up information about <em class="replaceable"><code>domain</code></em>, while <code class="constant">server</code> uses
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User the current default server. If an authoritative answer can't be
fd2597f75693a2279fdf588bd40dfe2407c42028Tinderbox User found, the names of servers that might have the answer are
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein returned.
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein </p></dd>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<dt><span class="term"><code class="constant">root</code></span></dt>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<dd><p>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein not implemented
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein </p></dd>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<dt><span class="term"><code class="constant">finger</code></span></dt>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<dd><p>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein not implemented
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein </p></dd>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<dt><span class="term"><code class="constant">ls</code></span></dt>
71c66a876ecca77923638d3f94cc0783152b2f03Mark Andrews<dd><p>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein not implemented
cd32f419a8a5432fbb139f56ee73cbf68b9350ccTinderbox User </p></dd>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<dt><span class="term"><code class="constant">view</code></span></dt>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<dd><p>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein not implemented
14a656f94b1fd0ababd84a772228dfa52276ba15Evan Hunt </p></dd>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<dt><span class="term"><code class="constant">help</code></span></dt>
60e5e10f8d2e2b0c41e8abad38cacd867caa6ab2Rob Austein<dd><p>
not implemented
</p></dd>
<dt><span class="term"><code class="constant">?</code></span></dt>
<dd><p>
not implemented
</p></dd>
<dt><span class="term"><code class="constant">exit</code></span></dt>
<dd><p>
Exits the program.
</p></dd>
<dt><span class="term"><code class="constant">set</code>
<em class="replaceable"><code>keyword[<span class="optional">=value</span>]</code></em></span></dt>
<dd>
<p>
This command is used to change state information that affects
the lookups. Valid keywords are:
</p>
<div class="variablelist"><dl class="variablelist">
<dt><span class="term"><code class="constant">all</code></span></dt>
<dd><p>
Prints the current values of the frequently used
options to <span class="command"><strong>set</strong></span>.
Information about the current default
server and host is also printed.
</p></dd>
<dt><span class="term"><code class="constant">class=</code><em class="replaceable"><code>value</code></em></span></dt>
<dd>
<p>
Change the query class to one of:
</p>
<div class="variablelist"><dl class="variablelist">
<dt><span class="term"><code class="constant">IN</code></span></dt>
<dd><p>
the Internet class
</p></dd>
<dt><span class="term"><code class="constant">CH</code></span></dt>
<dd><p>
the Chaos class
</p></dd>
<dt><span class="term"><code class="constant">HS</code></span></dt>
<dd><p>
the Hesiod class
</p></dd>
<dt><span class="term"><code class="constant">ANY</code></span></dt>
<dd><p>
wildcard
</p></dd>
</dl></div>
<p>
The class specifies the protocol group of the information.
</p>
<p>
(Default = IN; abbreviation = cl)
</p>
</dd>
<dt><span class="term"><code class="constant">
<em class="replaceable"><code>[<span class="optional">no</span>]</code></em>debug</code></span></dt>
<dd>
<p>
Turn on or off the display of the full response packet and
any intermediate response packets when searching.
</p>
<p>
(Default = nodebug; abbreviation = [<span class="optional">no</span>]deb)
</p>
</dd>
<dt><span class="term"><code class="constant">
<em class="replaceable"><code>[<span class="optional">no</span>]</code></em>d2</code></span></dt>
<dd>
<p>
Turn debugging mode on or off. This displays more about
what nslookup is doing.
</p>
<p>
(Default = nod2)
</p>
</dd>
<dt><span class="term"><code class="constant">domain=</code><em class="replaceable"><code>name</code></em></span></dt>
<dd><p>
Sets the search list to <em class="replaceable"><code>name</code></em>.
</p></dd>
<dt><span class="term"><code class="constant">
<em class="replaceable"><code>[<span class="optional">no</span>]</code></em>search</code></span></dt>
<dd>
<p>
If the lookup request contains at least one period but
doesn't end with a trailing period, append the domain
names in the domain search list to the request until an
answer is received.
</p>
<p>
(Default = search)
</p>
</dd>
<dt><span class="term"><code class="constant">port=</code><em class="replaceable"><code>value</code></em></span></dt>
<dd>
<p>
Change the default TCP/UDP name server port to <em class="replaceable"><code>value</code></em>.
</p>
<p>
(Default = 53; abbreviation = po)
</p>
</dd>
<dt><span class="term"><code class="constant">querytype=</code><em class="replaceable"><code>value</code></em></span></dt>
<dd><p></p></dd>
<dt><span class="term"><code class="constant">type=</code><em class="replaceable"><code>value</code></em></span></dt>
<dd>
<p>
Change the type of the information query.
</p>
<p>
(Default = A; abbreviations = q, ty)
</p>
</dd>
<dt><span class="term"><code class="constant">
<em class="replaceable"><code>[<span class="optional">no</span>]</code></em>recurse</code></span></dt>
<dd>
<p>
Tell the name server to query other servers if it does not
have the
information.
</p>
<p>
(Default = recurse; abbreviation = [no]rec)
</p>
</dd>
<dt><span class="term"><code class="constant">ndots=</code><em class="replaceable"><code>number</code></em></span></dt>
<dd><p>
Set the number of dots (label separators) in a domain
that will disable searching. Absolute names always
stop searching.
</p></dd>
<dt><span class="term"><code class="constant">retry=</code><em class="replaceable"><code>number</code></em></span></dt>
<dd><p>
Set the number of retries to number.
</p></dd>
<dt><span class="term"><code class="constant">timeout=</code><em class="replaceable"><code>number</code></em></span></dt>
<dd><p>
Change the initial timeout interval for waiting for a
reply to number seconds.
</p></dd>
<dt><span class="term"><code class="constant">
<em class="replaceable"><code>[<span class="optional">no</span>]</code></em>vc</code></span></dt>
<dd>
<p>
Always use a virtual circuit when sending requests to the
server.
</p>
<p>
(Default = novc)
</p>
</dd>
<dt><span class="term"><code class="constant">
<em class="replaceable"><code>[<span class="optional">no</span>]</code></em>fail</code></span></dt>
<dd>
<p>
Try the next nameserver if a nameserver responds with
SERVFAIL or a referral (nofail) or terminate query
(fail) on such a response.
</p>
<p>
(Default = nofail)
</p>
</dd>
</dl></div>
<p>
</p>
</dd>
</dl></div>
</div>
<div class="refsection">
<a name="id-1.14.6.10"></a><h2>RETURN VALUES</h2>
<p>
<span class="command"><strong>nslookup</strong></span> returns with an exit status of 1
if any query failed, and 0 otherwise.
</p>
</div>
<div class="refsection">
<a name="id-1.14.6.11"></a><h2>FILES</h2>
<p><code class="filename">/etc/resolv.conf</code>
</p>
</div>
<div class="refsection">
<a name="id-1.14.6.12"></a><h2>SEE ALSO</h2>
<p><span class="citerefentry"><span class="refentrytitle">dig</span>(1)</span>,
<span class="citerefentry"><span class="refentrytitle">host</span>(1)</span>,
<span class="citerefentry"><span class="refentrytitle">named</span>(8)</span>.
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