2N/A<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"

2N/A "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"

2N/A [<!ENTITY mdash "&#8212;">]>

2N/A

2N/A<refentry>

2N/A

2N/A <refentryinfo>

2N/A <date>Jun 30, 2000</date>

2N/A </refentryinfo>

2N/A

2N/A <refmeta>

2N/A <refentrytitle>nslookup</refentrytitle>

2N/A <manvolnum>1</manvolnum>

2N/A <refmiscinfo>BIND9</refmiscinfo>

2N/A </refmeta>

2N/A

2N/A <refnamediv>

2N/A <refname>nslookup</refname>

2N/A <refpurpose>query Internet name servers interactively</refpurpose>

2N/A </refnamediv>

2N/A

2N/A <docinfo>

2N/A <copyright>

2N/A <year>2004</year>

2N/A <year>2005</year>

2N/A <year>2006</year>

2N/A <year>2007</year>

2N/A <year>2010</year>

2N/A <year>2013</year>

2N/A <holder>Internet Systems Consortium, Inc. ("ISC")</holder>

2N/A </copyright>

2N/A </docinfo>

2N/A

2N/A <refsynopsisdiv>

2N/A <cmdsynopsis>

2N/A <command>nslookup</command>

2N/A <arg><option>-option</option></arg>

2N/A <arg choice="opt">name | -</arg>

2N/A <arg choice="opt">server</arg>

2N/A </cmdsynopsis>

2N/A </refsynopsisdiv>

2N/A

2N/A <refsect1>

2N/A <title>DESCRIPTION</title>

2N/A <para><command>Nslookup</command>

2N/A is a program to query Internet domain name servers. <command>Nslookup</command>

2N/A has two modes: interactive and non-interactive. Interactive mode allows

2N/A the user to query name servers for information about various hosts and

2N/A domains or to print a list of hosts in a domain. Non-interactive mode

2N/A is

2N/A used to print just the name and requested information for a host or

2N/A domain.

2N/A </para>

2N/A </refsect1>

2N/A

2N/A <refsect1>

2N/A <title>ARGUMENTS</title>

2N/A <para>

2N/A Interactive mode is entered in the following cases:

2N/A <orderedlist numeration="loweralpha">

2N/A <listitem>

2N/A <para>

2N/A when no arguments are given (the default name server will be used)

2N/A </para>

2N/A </listitem>

2N/A <listitem>

2N/A <para>

2N/A when the first argument is a hyphen (-) and the second argument is

2N/A the host name or Internet address of a name server.

2N/A </para>

2N/A </listitem>

2N/A </orderedlist>

2N/A </para>

2N/A

2N/A <para>

2N/A Non-interactive mode is used when the name or Internet address of the

2N/A host to be looked up is given as the first argument. The optional second

2N/A argument specifies the host name or address of a name server.

2N/A </para>

2N/A

2N/A <para>

2N/A Options can also be specified on the command line if they precede the

2N/A arguments and are prefixed with a hyphen. For example, to

2N/A change the default query type to host information, and the initial

2N/A timeout to 10 seconds, type:

2N/A <!-- <informalexample> produces bad nroff. -->

2N/A <programlisting>

2N/Anslookup -query=hinfo -timeout=10

2N/A</programlisting>

2N/A <!-- </informalexample> -->

2N/A </para>

2N/A

2N/A </refsect1>

2N/A

2N/A <refsect1>

2N/A <title>INTERACTIVE COMMANDS</title>

2N/A <variablelist>

2N/A <varlistentry>

2N/A <term><constant>host</constant> <optional>server</optional></term>

2N/A <listitem>

2N/A <para>

2N/A Look up information for host using the current default server or

2N/A using server, if specified. If host is an Internet address and

2N/A the query type is A or PTR, the name of the host is returned.

2N/A If host is a name and does not have a trailing period, the

2N/A search list is used to qualify the name.

2N/A </para>

2N/A

2N/A <para>

2N/A To look up a host not in the current domain, append a period to

2N/A the name.

2N/A </para>

2N/A </listitem>

2N/A </varlistentry>

2N/A

2N/A <varlistentry>

2N/A <term><constant>server</constant> <replaceable class="parameter">domain</replaceable></term>

2N/A <listitem>

2N/A <para/>

2N/A </listitem>

2N/A </varlistentry>

2N/A <varlistentry>

2N/A <term><constant>lserver</constant> <replaceable class="parameter">domain</replaceable></term>

2N/A <listitem>

2N/A <para>

2N/A Change the default server to <replaceable>domain</replaceable>; <constant>lserver</constant> uses the initial

2N/A server to look up information about <replaceable>domain</replaceable>, while <constant>server</constant> uses

2N/A the current default server. If an authoritative answer can't be

found, the names of servers that might have the answer are

returned.

</para>

</listitem>

</varlistentry>

<varlistentry>

<term><constant>root</constant></term>

<listitem>

<para>

not implemented

</para>

</listitem>

</varlistentry>

<varlistentry>

<term><constant>finger</constant></term>

<listitem>

<para>

not implemented

</para>

</listitem>

</varlistentry>

<varlistentry>

<term><constant>ls</constant></term>

<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>

</refsect1>

<refsect1>

<title>FILES</title>

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

</para>

</refsect1>

<refsect1>

<title>SEE ALSO</title>

<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>

</refsect1>

<refsect1>

<title>Author</title>

<para>

Andrew Cherenson

</para>

</refsect1>

</refentry><!--