bin/dig/nslookup.docbook

	nslookup.docbook revision 14a656f94b1fd0ababd84a772228dfa52276ba15
d6fa26d0adaec6c910115be34fe7a5a5f402c14fMark Andrews<!--
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User - Copyright (C) 2004-2007, 2010, 2013, 2014  Internet Systems Consortium, Inc. ("ISC")
32098293b78922a5fbd10906afa28624820d3756Tinderbox User -
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User - Permission to use, copy, modify, and/or distribute this software for any
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User - purpose with or without fee is hereby granted, provided that the above
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User - copyright notice and this permission notice appear in all copies.
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User -
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User - THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
d6fa26d0adaec6c910115be34fe7a5a5f402c14fMark Andrews - REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User - AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User - INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User - LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User - OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User - PERFORMANCE OF THIS SOFTWARE.
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User-->
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User<!--
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User - Copyright (c) 1985, 1989
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User -    The Regents of the University of California.  All rights reserved.
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User -
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User - Redistribution and use in source and binary forms, with or without
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User - modification, are permitted provided that the following conditions
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User - are met:
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User - 1. Redistributions of source code must retain the above copyright
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User -    notice, this list of conditions and the following disclaimer.
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User - 2. Redistributions in binary form must reproduce the above copyright
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User -    notice, this list of conditions and the following disclaimer in the
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User -    documentation and/or other materials provided with the distribution.
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User - 3. Neither the name of the University nor the names of its contributors
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User -    may be used to endorse or promote products derived from this software
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User -    without specific prior written permission.
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User -
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User - THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User - ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User - IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User - ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User - FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User - DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User - OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User - HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User - LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User - OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User - SUCH DAMAGE.
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User-->
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User<!-- Converted by db4-upgrade version 1.0 -->
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User<refentry xmlns="http://docbook.org/ns/docbook" version="5.0">
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User  <info>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User    <date>2014-01-24</date>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User  </info>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User  <refentryinfo>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User    <corpname>ISC</corpname>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User    <corpauthor>Internet Systems Consortium, Inc.</corpauthor>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User  </refentryinfo>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User  <refmeta>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User    <refentrytitle>nslookup</refentrytitle>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User    <manvolnum>1</manvolnum>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User    <refmiscinfo>BIND9</refmiscinfo>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User  </refmeta>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User  <refnamediv>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User    <refname>nslookup</refname>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User    <refpurpose>query Internet name servers interactively</refpurpose>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User  </refnamediv>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User  <docinfo>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User    <copyright>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User      <year>2004</year>
7e71f05d8643aca84914437c900cb716444507e4Tinderbox User      <year>2005</year>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User      <year>2006</year>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User      <year>2007</year>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User      <year>2010</year>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User      <year>2013</year>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User      <year>2014</year>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User      <holder>Internet Systems Consortium, Inc. ("ISC")</holder>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User    </copyright>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User  </docinfo>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User
7e71f05d8643aca84914437c900cb716444507e4Tinderbox User  <refsynopsisdiv>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User    <cmdsynopsis sepchar=" ">
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User      <command>nslookup</command>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User      <arg choice="opt" rep="norepeat"><option>-option</option></arg>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User      <arg choice="opt" rep="norepeat">name | -</arg>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User      <arg choice="opt" rep="norepeat">server</arg>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User    </cmdsynopsis>
bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User  </refsynopsisdiv>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User  <refsection><info><title>DESCRIPTION</title></info>
bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User
bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User    <para><command>Nslookup</command>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User      is a program to query Internet domain name servers.  <command>Nslookup</command>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User      has two modes: interactive and non-interactive.  Interactive mode allows
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User      the user to query name servers for information about various hosts and
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User      domains or to print a list of hosts in a domain.  Non-interactive mode
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User      is
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User      used to print just the name and requested information for a host or
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User      domain.
bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User    </para>
bfb7b680bf88c1fdd9949197b71c512c532280a4Tinderbox User  </refsection>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User  <refsection><info><title>ARGUMENTS</title></info>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User    <para>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User      Interactive mode is entered in the following cases:
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User      <orderedlist numeration="loweralpha" inheritnum="ignore" continuation="restarts">
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User        <listitem>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User          <para>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User            when no arguments are given (the default name server will be used)
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User          </para>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User        </listitem>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User        <listitem>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User          <para>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User            when the first argument is a hyphen (-) and the second argument is
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User            the host name or Internet address of a name server.
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User          </para>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User        </listitem>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User      </orderedlist>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User    </para>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User    <para>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User      Non-interactive mode is used when the name or Internet address of the
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User      host to be looked up is given as the first argument. The optional second
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User      argument specifies the host name or address of a name server.
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User    </para>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User    <para>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User      Options can also be specified on the command line if they precede the
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User      arguments and are prefixed with a hyphen.  For example, to
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User      change the default query type to host information, and the initial
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User      timeout to 10 seconds, type:
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User      <!-- <informalexample> produces bad nroff. -->
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User        <programlisting>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox Usernslookup -query=hinfo  -timeout=10
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User</programlisting>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User      <!-- </informalexample> -->
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User    </para>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User    <para>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User      The <option>-version</option> option causes
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User      <command>nslookup</command> to print the version
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User      number and immediately exits.
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User    </para>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User  </refsection>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User  <refsection><info><title>INTERACTIVE COMMANDS</title></info>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User    <variablelist>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User      <varlistentry>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User        <term><constant>host</constant> <optional>server</optional></term>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User        <listitem>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User          <para>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User            Look up information for host using the current default server or
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User            using server, if specified.  If host is an Internet address and
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User            the query type is A or PTR, the name of the host is returned.
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User            If host is a name and does not have a trailing period, the
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User            search list is used to qualify the name.
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User          </para>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User          <para>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User            To look up a host not in the current domain, append a period to
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User            the name.
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User          </para>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User        </listitem>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User      </varlistentry>
7e71f05d8643aca84914437c900cb716444507e4Tinderbox User
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User      <varlistentry>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User        <term><constant>server</constant> <replaceable class="parameter">domain</replaceable></term>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User        <listitem>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User          <para/>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User        </listitem>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User      </varlistentry>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User      <varlistentry>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User        <term><constant>lserver</constant> <replaceable class="parameter">domain</replaceable></term>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User        <listitem>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User          <para>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User            Change the default server to <replaceable>domain</replaceable>; <constant>lserver</constant> uses the initial
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User            server to look up information about <replaceable>domain</replaceable>, while <constant>server</constant> uses
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User            the current default server.  If an authoritative answer can't be
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User            found, the names of servers that might have the answer are
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User            returned.
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User          </para>
7911e6f9de303bca5a3d8b34f4330c8f7cecffaeTinderbox User        </listitem>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User      </varlistentry>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User      <varlistentry>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User        <term><constant>root</constant></term>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User        <listitem>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User          <para>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User            not implemented
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User          </para>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User        </listitem>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User      </varlistentry>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User      <varlistentry>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User        <term><constant>finger</constant></term>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User        <listitem>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User          <para>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User            not implemented
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User          </para>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User        </listitem>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User      </varlistentry>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User
0b89eee6167201843c9a46b7e7c63cb1e4e09ba3Tinderbox User      <varlistentry>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User        <term><constant>ls</constant></term>
1e9517ea2156b990be21f44676d3370318eacf17Tinderbox User        <listitem>
          <para>
            not implemented
          </para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><constant>view</constant></term>
        <listitem>
          <para>
            not implemented
          </para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><constant>help</constant></term>
        <listitem>
          <para>
            not implemented
          </para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><constant>?</constant></term>
        <listitem>
          <para>
            not implemented
          </para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><constant>exit</constant></term>
        <listitem>
          <para>
            Exits the program.
          </para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><constant>set</constant>
          <replaceable>keyword<optional>=value</optional></replaceable></term>
        <listitem>
          <para>
            This command is used to change state information that affects
            the lookups.  Valid keywords are:
            <variablelist>
              <varlistentry>
                <term><constant>all</constant></term>
                <listitem>
                  <para>
                    Prints the current values of the frequently used
                    options to <command>set</command>.
                    Information about the  current default
                    server and host is also printed.
                  </para>
                </listitem>
              </varlistentry>

              <varlistentry>
                <term><constant>class=</constant><replaceable>value</replaceable></term>
                <listitem>
                  <para>
                    Change the query class to one of:
                    <variablelist>
                      <varlistentry>
                        <term><constant>IN</constant></term>
                        <listitem>
                          <para>
                            the Internet class
                          </para>
                        </listitem>
                      </varlistentry>
                      <varlistentry>
                        <term><constant>CH</constant></term>
                        <listitem>
                          <para>
                            the Chaos class
                          </para>
                        </listitem>
                      </varlistentry>
                      <varlistentry>
                        <term><constant>HS</constant></term>
                        <listitem>
                          <para>
                            the Hesiod class
                          </para>
                        </listitem>
                      </varlistentry>
                      <varlistentry>
                        <term><constant>ANY</constant></term>
                        <listitem>
                          <para>
                            wildcard
                          </para>
                        </listitem>
                      </varlistentry>
                    </variablelist>
                    The class specifies the protocol group of the information.

                  </para>
          <para>
                    (Default = IN; abbreviation = cl)
                  </para>
                </listitem>
              </varlistentry>

              <varlistentry>
                <term><constant>
                    <replaceable><optional>no</optional></replaceable>debug</constant></term>
                <listitem>
                  <para>
            Turn on or off the display of the full response packet and
            any intermediate response packets when searching.
                  </para>
          <para>
                    (Default = nodebug; abbreviation = <optional>no</optional>deb)
                  </para>
                </listitem>
              </varlistentry>

              <varlistentry>
                <term><constant>
                    <replaceable><optional>no</optional></replaceable>d2</constant></term>
                <listitem>
                  <para>
                    Turn debugging mode on or off.  This displays more about
                what nslookup is doing.
                  </para>
          <para>
                    (Default = nod2)
                  </para>
                </listitem>
              </varlistentry>

              <varlistentry>
                <term><constant>domain=</constant><replaceable>name</replaceable></term>
                <listitem>
                  <para>
                    Sets the search list to <replaceable>name</replaceable>.
                  </para>
                </listitem>
              </varlistentry>

              <varlistentry>
                <term><constant>
                    <replaceable><optional>no</optional></replaceable>search</constant></term>
                <listitem>
                  <para>
                    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.
                  </para>
          <para>
                    (Default = search)
                  </para>
                </listitem>
              </varlistentry>

              <varlistentry>
                <term><constant>port=</constant><replaceable>value</replaceable></term>
                <listitem>
                  <para>
                    Change the default TCP/UDP name server port to <replaceable>value</replaceable>.
                  </para>
          <para>
                    (Default = 53; abbreviation = po)
                  </para>
                </listitem>
              </varlistentry>

              <varlistentry>
                <term><constant>querytype=</constant><replaceable>value</replaceable></term>
                <listitem>
                  <para/>
                </listitem>
              </varlistentry>

              <varlistentry>
                <term><constant>type=</constant><replaceable>value</replaceable></term>
                <listitem>
                  <para>
                    Change the type of the information query.
                  </para>
          <para>
                    (Default = A; abbreviations = q, ty)
                  </para>
                </listitem>
              </varlistentry>

              <varlistentry>
                <term><constant>
                    <replaceable><optional>no</optional></replaceable>recurse</constant></term>
                <listitem>
                  <para>
                    Tell the name server to query other servers if it does not
                    have the
                    information.
                  </para>
          <para>
                    (Default = recurse; abbreviation = [no]rec)
                  </para>
                </listitem>
              </varlistentry>

              <varlistentry>
                <term><constant>ndots=</constant><replaceable>number</replaceable></term>
                <listitem>
                  <para>
            Set the number of dots (label separators) in a domain
            that will disable searching.  Absolute names always
            stop searching.
                  </para>
                </listitem>
              </varlistentry>

              <varlistentry>
                <term><constant>retry=</constant><replaceable>number</replaceable></term>
                <listitem>
                  <para>
                    Set the number of retries to number.
                  </para>
                </listitem>
              </varlistentry>

              <varlistentry>
                <term><constant>timeout=</constant><replaceable>number</replaceable></term>
                <listitem>
                  <para>
                    Change the initial timeout interval for waiting for a
                    reply to number seconds.
                  </para>
                </listitem>
              </varlistentry>

              <varlistentry>
                <term><constant>
                    <replaceable><optional>no</optional></replaceable>vc</constant></term>
                <listitem>
                  <para>
                    Always use a virtual circuit when sending requests to the
                    server.
                  </para>
          <para>
                    (Default = novc)
                  </para>
                </listitem>
              </varlistentry>

              <varlistentry>
                <term><constant>
                    <replaceable><optional>no</optional></replaceable>fail</constant></term>
                <listitem>
                  <para>
            Try the next nameserver if a nameserver responds with
            SERVFAIL or a referral (nofail) or terminate query
            (fail) on such a response.
          </para>
          <para>
                    (Default = nofail)
                  </para>
            </listitem>
          </varlistentry>

            </variablelist>
          </para>
        </listitem>
      </varlistentry>
    </variablelist>
  </refsection>

  <refsection><info><title>FILES</title></info>

    <para><filename>/etc/resolv.conf</filename>
    </para>
  </refsection>

  <refsection><info><title>SEE ALSO</title></info>

    <para><citerefentry>
        <refentrytitle>dig</refentrytitle><manvolnum>1</manvolnum>
      </citerefentry>,
      <citerefentry>
        <refentrytitle>host</refentrytitle><manvolnum>1</manvolnum>
      </citerefentry>,
      <citerefentry>
        <refentrytitle>named</refentrytitle><manvolnum>8</manvolnum>
      </citerefentry>.
    </para>
  </refsection>
</refentry>