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diff --git a/bin/dig/host.docbook b/bin/dig/host.docbook new file mode 100644 index 0000000..8ab7679 --- /dev/null +++ b/bin/dig/host.docbook @@ -0,0 +1,277 @@ +<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" + "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" + [<!ENTITY mdash "—">]> +<!-- + - Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC") + - Copyright (C) 2000-2002 Internet Software Consortium. + - + - Permission to use, copy, modify, and/or distribute this software for any + - purpose with or without fee is hereby granted, provided that the above + - copyright notice and this permission notice appear in all copies. + - + - THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH + - REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + - AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, + - INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM + - LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE + - OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + - PERFORMANCE OF THIS SOFTWARE. +--> + +<!-- $Id: host.docbook,v 1.5.18.11 2007/08/28 07:19:55 tbox Exp $ --> +<refentry id="man.host"> + + <refentryinfo> + <date>Jun 30, 2000</date> + </refentryinfo> + + <refmeta> + <refentrytitle>host</refentrytitle> + <manvolnum>1</manvolnum> + <refmiscinfo>BIND9</refmiscinfo> + </refmeta> + + <refnamediv> + <refname>host</refname> + <refpurpose>DNS lookup utility</refpurpose> + </refnamediv> + + <docinfo> + <copyright> + <year>2004</year> + <year>2005</year> + <year>2007</year> + <holder>Internet Systems Consortium, Inc. ("ISC")</holder> + </copyright> + <copyright> + <year>2000</year> + <year>2001</year> + <year>2002</year> + <holder>Internet Software Consortium.</holder> + </copyright> + </docinfo> + + <refsynopsisdiv> + <cmdsynopsis> + <command>host</command> + <arg><option>-aCdlnrsTwv</option></arg> + <arg><option>-c <replaceable class="parameter">class</replaceable></option></arg> + <arg><option>-N <replaceable class="parameter">ndots</replaceable></option></arg> + <arg><option>-R <replaceable class="parameter">number</replaceable></option></arg> + <arg><option>-t <replaceable class="parameter">type</replaceable></option></arg> + <arg><option>-W <replaceable class="parameter">wait</replaceable></option></arg> + <arg><option>-m <replaceable class="parameter">flag</replaceable></option></arg> + <arg><option>-4</option></arg> + <arg><option>-6</option></arg> + <arg choice="req">name</arg> + <arg choice="opt">server</arg> + </cmdsynopsis> + </refsynopsisdiv> + + <refsect1> + <title>DESCRIPTION</title> + + <para><command>host</command> + is a simple utility for performing DNS lookups. + It is normally used to convert names to IP addresses and vice versa. + When no arguments or options are given, + <command>host</command> + prints a short summary of its command line arguments and options. + </para> + + <para><parameter>name</parameter> is the domain name that is to be + looked + up. It can also be a dotted-decimal IPv4 address or a colon-delimited + IPv6 address, in which case <command>host</command> will by + default + perform a reverse lookup for that address. + <parameter>server</parameter> is an optional argument which + is either + the name or IP address of the name server that <command>host</command> + should query instead of the server or servers listed in + <filename>/etc/resolv.conf</filename>. + </para> + + <para> + The <option>-a</option> (all) option is equivalent to setting the + <option>-v</option> option and asking <command>host</command> to make + a query of type ANY. + </para> + + <para> + When the <option>-C</option> option is used, <command>host</command> + will attempt to display the SOA records for zone + <parameter>name</parameter> from all the listed + authoritative name + servers for that zone. The list of name servers is defined by the NS + records that are found for the zone. + </para> + + <para> + The <option>-c</option> option instructs to make a DNS query of class + <parameter>class</parameter>. This can be used to lookup + Hesiod or + Chaosnet class resource records. The default class is IN (Internet). + </para> + + <para> + Verbose output is generated by <command>host</command> when + the + <option>-d</option> or <option>-v</option> option is used. The two + options are equivalent. They have been provided for backwards + compatibility. In previous versions, the <option>-d</option> option + switched on debugging traces and <option>-v</option> enabled verbose + output. + </para> + + <para> + List mode is selected by the <option>-l</option> option. This makes + <command>host</command> perform a zone transfer for zone + <parameter>name</parameter>. Transfer the zone printing out + the NS, PTR + and address records (A/AAAA). If combined with <option>-a</option> + all records will be printed. + </para> + + <para> + The <option>-i</option> + option specifies that reverse lookups of IPv6 addresses should + use the IP6.INT domain as defined in RFC1886. + The default is to use IP6.ARPA. + </para> + + <para> + The <option>-N</option> option sets the number of dots that have to be + in <parameter>name</parameter> for it to be considered + absolute. The + default value is that defined using the ndots statement in + <filename>/etc/resolv.conf</filename>, or 1 if no ndots + statement is + present. Names with fewer dots are interpreted as relative names and + will be searched for in the domains listed in the <type>search</type> + or <type>domain</type> directive in + <filename>/etc/resolv.conf</filename>. + </para> + + <para> + The number of UDP retries for a lookup can be changed with the + <option>-R</option> option. <parameter>number</parameter> + indicates + how many times <command>host</command> will repeat a query + that does + not get answered. The default number of retries is 1. If + <parameter>number</parameter> is negative or zero, the + number of + retries will default to 1. + </para> + + <para> + Non-recursive queries can be made via the <option>-r</option> option. + Setting this option clears the <type>RD</type> — recursion + desired — bit in the query which <command>host</command> makes. + This should mean that the name server receiving the query will not + attempt to resolve <parameter>name</parameter>. The + <option>-r</option> option enables <command>host</command> + to mimic + the behavior of a name server by making non-recursive queries and + expecting to receive answers to those queries that are usually + referrals to other name servers. + </para> + + <para> + By default <command>host</command> uses UDP when making + queries. The + <option>-T</option> option makes it use a TCP connection when querying + the name server. TCP will be automatically selected for queries that + require it, such as zone transfer (AXFR) requests. + </para> + + <para> + The <option>-4</option> option forces <command>host</command> to only + use IPv4 query transport. The <option>-6</option> option forces + <command>host</command> to only use IPv6 query transport. + </para> + + <para> + The <option>-t</option> option is used to select the query type. + <parameter>type</parameter> can be any recognized query + type: CNAME, + NS, SOA, SIG, KEY, AXFR, etc. When no query type is specified, + <command>host</command> automatically selects an appropriate + query + type. By default it looks for A records, but if the + <option>-C</option> option was given, queries will be made for SOA + records, and if <parameter>name</parameter> is a + dotted-decimal IPv4 + address or colon-delimited IPv6 address, <command>host</command> will + query for PTR records. If a query type of IXFR is chosen the starting + serial number can be specified by appending an equal followed by the + starting serial number (e.g. -t IXFR=12345678). + </para> + + <para> + The time to wait for a reply can be controlled through the + <option>-W</option> and <option>-w</option> options. The + <option>-W</option> option makes <command>host</command> + wait for + <parameter>wait</parameter> seconds. If <parameter>wait</parameter> + is less than one, the wait interval is set to one second. When the + <option>-w</option> option is used, <command>host</command> + will + effectively wait forever for a reply. The time to wait for a response + will be set to the number of seconds given by the hardware's maximum + value for an integer quantity. + </para> + + <para> + The <option>-s</option> option tells <command>host</command> + <emphasis>not</emphasis> to send the query to the next nameserver + if any server responds with a SERVFAIL response, which is the + reverse of normal stub resolver behavior. + </para> + + <para> + The <option>-m</option> can be used to set the memory usage debugging + flags + <parameter>record</parameter>, <parameter>usage</parameter> and + <parameter>trace</parameter>. + </para> + </refsect1> + + <refsect1> + <title>IDN SUPPORT</title> + <para> + If <command>host</command> has been built with IDN (internationalized + domain name) support, it can accept and display non-ASCII domain names. + <command>host</command> appropriately converts character encoding of + domain name before sending a request to DNS server or displaying a + reply from the server. + If you'd like to turn off the IDN support for some reason, defines + the <envar>IDN_DISABLE</envar> environment variable. + The IDN support is disabled if the variable is set when + <command>host</command> runs. + </para> + </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>named</refentrytitle><manvolnum>8</manvolnum> + </citerefentry>. + </para> + + </refsect1> +</refentry><!-- + - Local variables: + - mode: sgml + - End: +--> |
