dig.html revision 61e1dc26d62c2a0059e3ca7efe2ad0f4a5b8df92
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington<!--
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington - Copyright (C) 2004 Internet Systems Consortium, Inc. ("ISC")
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington - Copyright (C) 2000-2003 Internet Software Consortium.
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington -
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington - Permission to use, copy, modify, and distribute this software for any
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington - purpose with or without fee is hereby granted, provided that the above
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington - copyright notice and this permission notice appear in all copies.
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington -
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington - THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington - REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington - AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington - INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington - LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
bac066aba91585304ce46b92b923c344ab8d2150Phill Cunnington - OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington - PERFORMANCE OF THIS SOFTWARE.
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington-->
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington<!-- $Id: dig.html,v 1.15 2004/04/07 00:56:59 marka Exp $ -->
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington<HTML
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><HEAD
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><TITLE
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>dig</TITLE
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><META
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonNAME="GENERATOR"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCONTENT="Modular DocBook HTML Stylesheet Version 1.73
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington"></HEAD
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><BODY
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="REFENTRY"
dfc4e0fc3052835b2a069aa9d869fa1161c33fe6Peter MajorBGCOLOR="#FFFFFF"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonTEXT="#000000"
bac066aba91585304ce46b92b923c344ab8d2150Phill CunningtonLINK="#0000FF"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonVLINK="#840084"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonALINK="#0000FF"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><H1
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><A
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonNAME="AEN1"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>dig</A
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></H1
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><DIV
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="REFNAMEDIV"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><A
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonNAME="AEN8"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></A
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><H2
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>Name</H2
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>dig&nbsp;--&nbsp;DNS lookup utility</DIV
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><DIV
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="REFSYNOPSISDIV"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><A
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonNAME="AEN11"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></A
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><H2
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>Synopsis</H2
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><P
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><B
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="COMMAND"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>dig</B
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington> [@server] [<TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="OPTION"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>-b <TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="REPLACEABLE"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><I
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>address</I
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>] [<TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="OPTION"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>-c <TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="REPLACEABLE"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><I
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>class</I
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>] [<TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="OPTION"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>-f <TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="REPLACEABLE"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><I
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>filename</I
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>] [<TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="OPTION"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>-k <TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="REPLACEABLE"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><I
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>filename</I
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>] [<TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="OPTION"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>-p <TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="REPLACEABLE"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><I
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>port#</I
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>] [<TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="OPTION"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>-t <TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="REPLACEABLE"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><I
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>type</I
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>] [<TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="OPTION"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>-x <TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="REPLACEABLE"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><I
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>addr</I
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>] [<TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="OPTION"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>-y <TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="REPLACEABLE"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><I
1ac44a3392f67ffa8d3302b72bac3d3306265f5bPhill Cunnington>name:key</I
1ac44a3392f67ffa8d3302b72bac3d3306265f5bPhill Cunnington></TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>] [name] [type] [class] [queryopt...]</P
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><P
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><B
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="COMMAND"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>dig</B
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington> [<TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="OPTION"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>-h</TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>]</P
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><P
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><B
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="COMMAND"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>dig</B
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington> [global-queryopt...] [query...]</P
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></DIV
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><DIV
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="REFSECT1"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><A
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonNAME="AEN51"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></A
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><H2
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>DESCRIPTION</H2
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><P
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><B
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="COMMAND"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>dig</B
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington> (domain information groper) is a flexible tool
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunningtonfor interrogating DNS name servers. It performs DNS lookups and
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunningtondisplays the answers that are returned from the name server(s) that
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunningtonwere queried. Most DNS administrators use <B
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="COMMAND"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>dig</B
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington> to
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunningtontroubleshoot DNS problems because of its flexibility, ease of use and
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunningtonclarity of output. Other lookup tools tend to have less functionality
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunningtonthan <B
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="COMMAND"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>dig</B
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>.</P
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><P
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>Although <B
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="COMMAND"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>dig</B
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington> is normally used with command-line
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunningtonarguments, it also has a batch mode of operation for reading lookup
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunningtonrequests from a file. A brief summary of its command-line arguments
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunningtonand options is printed when the <TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="OPTION"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>-h</TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington> option is given.
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonUnlike earlier versions, the BIND9 implementation of
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington<B
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="COMMAND"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>dig</B
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington> allows multiple lookups to be issued from the
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunningtoncommand line.</P
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><P
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>Unless it is told to query a specific name server,
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington<B
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="COMMAND"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>dig</B
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington> will try each of the servers listed in
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington<TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="FILENAME"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>/etc/resolv.conf</TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>.</P
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><P
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>When no command line arguments or options are given, will perform an
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonNS query for "." (the root).</P
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><P
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>It is possible to set per-user defaults for <B
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="COMMAND"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>dig</B
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington> via
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington<TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="FILENAME"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>${HOME}/.digrc</TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>. This file is read and any options in it
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunningtonare applied before the command line arguments.</P
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></DIV
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><DIV
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="REFSECT1"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><A
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonNAME="AEN68"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></A
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><H2
bac066aba91585304ce46b92b923c344ab8d2150Phill Cunnington>SIMPLE USAGE</H2
3c68a9340994f97a27e00efee146a9478dc12f9cDavid Luna><P
3c68a9340994f97a27e00efee146a9478dc12f9cDavid Luna>A typical invocation of <B
3c68a9340994f97a27e00efee146a9478dc12f9cDavid LunaCLASS="COMMAND"
3c68a9340994f97a27e00efee146a9478dc12f9cDavid Luna>dig</B
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington> looks like:
3c68a9340994f97a27e00efee146a9478dc12f9cDavid Luna<PRE
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="PROGRAMLISTING"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington> dig @server name type </PRE
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington> where:
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington<P
3c68a9340994f97a27e00efee146a9478dc12f9cDavid Luna></P
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><DIV
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="VARIABLELIST"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><DL
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><DT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="CONSTANT"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>server</TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></DT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><DD
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><P
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>is the name or IP address of the name server to query. This can be an IPv4
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunningtonaddress in dotted-decimal notation or an IPv6
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunningtonaddress in colon-delimited notation. When the supplied
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington<TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="PARAMETER"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><I
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>server</I
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington> argument is a hostname,
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington<B
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="COMMAND"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>dig</B
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington> resolves that name before querying that name
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunningtonserver. If no <TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="PARAMETER"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><I
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>server</I
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington> argument is provided,
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington<B
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="COMMAND"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>dig</B
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington> consults <TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="FILENAME"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>/etc/resolv.conf</TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunningtonand queries the name servers listed there. The reply from the name
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunningtonserver that responds is displayed.</P
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></DD
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><DT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="CONSTANT"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>name</TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></DT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><DD
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><P
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>is the name of the resource record that is to be looked up.</P
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></DD
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><DT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="CONSTANT"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>type</TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></DT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><DD
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><P
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>indicates what type of query is required &mdash;
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonANY, A, MX, SIG, etc.
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington<TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="PARAMETER"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><I
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>type</I
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington> can be any valid query type. If no
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington<TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="PARAMETER"
3c68a9340994f97a27e00efee146a9478dc12f9cDavid Luna><I
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>type</I
3c68a9340994f97a27e00efee146a9478dc12f9cDavid Luna></TT
3c68a9340994f97a27e00efee146a9478dc12f9cDavid Luna> argument is supplied,
3c68a9340994f97a27e00efee146a9478dc12f9cDavid Luna<B
3c68a9340994f97a27e00efee146a9478dc12f9cDavid LunaCLASS="COMMAND"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>dig</B
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington> will perform a lookup for an A record.</P
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></DD
3c68a9340994f97a27e00efee146a9478dc12f9cDavid Luna></DL
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></DIV
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></P
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></DIV
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><DIV
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="REFSECT1"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><A
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonNAME="AEN97"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></A
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><H2
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>OPTIONS</H2
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><P
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>The <TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="OPTION"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>-b</TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington> option sets the source IP address of the query
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunningtonto <TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="PARAMETER"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><I
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>address</I
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>. This must be a valid address on
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunningtonone of the host's network interfaces or "0.0.0.0" or "::". An optional port
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunningtonmay be specified by appending "#&lt;port&gt;"</P
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><P
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>The default query class (IN for internet) is overridden by the
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington<TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="OPTION"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>-c</TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington> option. <TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="PARAMETER"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><I
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>class</I
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington> is any valid
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunningtonclass, such as HS for Hesiod records or CH for CHAOSNET records.</P
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><P
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>The <TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="OPTION"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>-f</TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington> option makes <B
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="COMMAND"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>dig </B
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington> operate
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunningtonin batch mode by reading a list of lookup requests to process from the
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunningtonfile <TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill CunningtonCLASS="PARAMETER"
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington><I
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>filename</I
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington></TT
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunnington>. The file contains a number of
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunningtonqueries, one per line. Each entry in the file should be organised in
9470f6b5e11719100cdb2fef604888d5ca4fd384Phill Cunningtonthe same way they would be presented as queries to
<B
CLASS="COMMAND"
>dig</B
> using the command-line interface.</P
><P
>If a non-standard port number is to be queried, the
<TT
CLASS="OPTION"
>-p</TT
> option is used. <TT
CLASS="PARAMETER"
><I
>port#</I
></TT
> is
the port number that <B
CLASS="COMMAND"
>dig</B
> will send its queries
instead of the standard DNS port number 53. This option would be used
to test a name server that has been configured to listen for queries
on a non-standard port number.</P
><P
>The <TT
CLASS="OPTION"
>-t</TT
> option sets the query type to
<TT
CLASS="PARAMETER"
><I
>type</I
></TT
>. It can be any valid query type which is
supported in BIND9. The default query type "A", unless the
<TT
CLASS="OPTION"
>-x</TT
> option is supplied to indicate a reverse lookup.
A zone transfer can be requested by specifying a type of AXFR. When
an incremental zone transfer (IXFR) is required,
<TT
CLASS="PARAMETER"
><I
>type</I
></TT
> is set to <TT
CLASS="LITERAL"
>ixfr=N</TT
>.
The incremental zone transfer will contain the changes made to the zone
since the serial number in the zone's SOA record was
<TT
CLASS="PARAMETER"
><I
>N</I
></TT
>.</P
><P
>Reverse lookups - mapping addresses to names - are simplified by the
<TT
CLASS="OPTION"
>-x</TT
> option. <TT
CLASS="PARAMETER"
><I
>addr</I
></TT
> is an IPv4
address in dotted-decimal notation, or a colon-delimited IPv6 address.
When this option is used, there is no need to provide the
<TT
CLASS="PARAMETER"
><I
>name</I
></TT
>, <TT
CLASS="PARAMETER"
><I
>class</I
></TT
> and
<TT
CLASS="PARAMETER"
><I
>type</I
></TT
> arguments. <B
CLASS="COMMAND"
>dig</B
>
automatically performs a lookup for a name like
<TT
CLASS="LITERAL"
>11.12.13.10.in-addr.arpa</TT
> and sets the query type and
class to PTR and IN respectively. By default, IPv6 addresses are
looked up using nibble format under the IP6.ARPA domain.
To use the older RFC1886 method using the IP6.INT domain
specify the <TT
CLASS="OPTION"
>-i</TT
> option. Bit string labels (RFC2874)
are now experimental and are not attempted.</P
><P
>To sign the DNS queries sent by <B
CLASS="COMMAND"
>dig</B
> and their
responses using transaction signatures (TSIG), specify a TSIG key file
using the <TT
CLASS="OPTION"
>-k</TT
> option. You can also specify the TSIG
key itself on the command line using the <TT
CLASS="OPTION"
>-y</TT
> option;
<TT
CLASS="PARAMETER"
><I
>name</I
></TT
> is the name of the TSIG key and
<TT
CLASS="PARAMETER"
><I
>key</I
></TT
> is the actual key. The key is a base-64
encoded string, typically generated by <SPAN
CLASS="CITEREFENTRY"
><SPAN
CLASS="REFENTRYTITLE"
>dnssec-keygen</SPAN
>(8)</SPAN
>.
Caution should be taken when using the <TT
CLASS="OPTION"
>-y</TT
> option on
multi-user systems as the key can be visible in the output from
<SPAN
CLASS="CITEREFENTRY"
><SPAN
CLASS="REFENTRYTITLE"
>ps</SPAN
>(1)</SPAN
> or in the shell's history file. When
using TSIG authentication with <B
CLASS="COMMAND"
>dig</B
>, the name
server that is queried needs to know the key and algorithm that is
being used. In BIND, this is done by providing appropriate
<B
CLASS="COMMAND"
>key</B
> and <B
CLASS="COMMAND"
>server</B
> statements in
<TT
CLASS="FILENAME"
>named.conf</TT
>.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN147"
></A
><H2
>QUERY OPTIONS</H2
><P
><B
CLASS="COMMAND"
>dig</B
> provides a number of query options which affect
the way in which lookups are made and the results displayed. Some of
these set or reset flag bits in the query header, some determine which
sections of the answer get printed, and others determine the timeout
and retry strategies.</P
><P
>Each query option is identified by a keyword preceded by a plus sign
(<TT
CLASS="LITERAL"
>+</TT
>). Some keywords set or reset an option. These may be preceded
by the string <TT
CLASS="LITERAL"
>no</TT
> to negate the meaning of that keyword. Other
keywords assign values to options like the timeout interval. They
have the form <TT
CLASS="OPTION"
>+keyword=value</TT
>.
The query options are:
<P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="OPTION"
>+[no]tcp</TT
></DT
><DD
><P
>Use [do not use] TCP when querying name servers. The default
behaviour is to use UDP unless an AXFR or IXFR query is requested, in
which case a TCP connection is used.</P
></DD
><DT
><TT
CLASS="OPTION"
>+[no]vc</TT
></DT
><DD
><P
>Use [do not use] TCP when querying name servers. This alternate
syntax to <TT
CLASS="PARAMETER"
><I
>+[no]tcp</I
></TT
> is provided for backwards
compatibility. The "vc" stands for "virtual circuit".</P
></DD
><DT
><TT
CLASS="OPTION"
>+[no]ignore</TT
></DT
><DD
><P
>Ignore truncation in UDP responses instead of retrying with TCP. By
default, TCP retries are performed.</P
></DD
><DT
><TT
CLASS="OPTION"
>+domain=somename</TT
></DT
><DD
><P
>Set the search list to contain the single domain
<TT
CLASS="PARAMETER"
><I
>somename</I
></TT
>, as if specified in a
<B
CLASS="COMMAND"
>domain</B
> directive in
<TT
CLASS="FILENAME"
>/etc/resolv.conf</TT
>, and enable search list
processing as if the <TT
CLASS="PARAMETER"
><I
>+search</I
></TT
> option were given.</P
></DD
><DT
><TT
CLASS="OPTION"
>+[no]search</TT
></DT
><DD
><P
>Use [do not use] the search list defined by the searchlist or domain
directive in <TT
CLASS="FILENAME"
>resolv.conf</TT
> (if any).
The search list is not used by default.</P
></DD
><DT
><TT
CLASS="OPTION"
>+[no]defname</TT
></DT
><DD
><P
>Deprecated, treated as a synonym for <TT
CLASS="PARAMETER"
><I
>+[no]search</I
></TT
></P
></DD
><DT
><TT
CLASS="OPTION"
>+[no]aaonly</TT
></DT
><DD
><P
>This option does nothing. It is provided for compatibility with old
versions of <B
CLASS="COMMAND"
>dig</B
> where it set an unimplemented
resolver flag.</P
></DD
><DT
><TT
CLASS="OPTION"
>+[no]adflag</TT
></DT
><DD
><P
>Set [do not set] the AD (authentic data) bit in the query. The AD bit
currently has a standard meaning only in responses, not in queries,
but the ability to set the bit in the query is provided for
completeness.</P
></DD
><DT
><TT
CLASS="OPTION"
>+[no]cdflag</TT
></DT
><DD
><P
>Set [do not set] the CD (checking disabled) bit in the query. This
requests the server to not perform DNSSEC validation of responses.</P
></DD
><DT
><TT
CLASS="OPTION"
>+[no]cl</TT
></DT
><DD
><P
>Display [do not display] the CLASS when printing the record.</P
></DD
><DT
><TT
CLASS="OPTION"
>+[no]ttlid</TT
></DT
><DD
><P
>Display [do not display] the TTL when printing the record.</P
></DD
><DT
><TT
CLASS="OPTION"
>+[no]recurse</TT
></DT
><DD
><P
>Toggle the setting of the RD (recursion desired) bit in the query.
This bit is set by default, which means <B
CLASS="COMMAND"
>dig</B
>
normally sends recursive queries. Recursion is automatically disabled
when the <TT
CLASS="PARAMETER"
><I
>+nssearch</I
></TT
> or
<TT
CLASS="PARAMETER"
><I
>+trace</I
></TT
> query options are used.</P
></DD
><DT
><TT
CLASS="OPTION"
>+[no]nssearch</TT
></DT
><DD
><P
>When this option is set, <B
CLASS="COMMAND"
>dig</B
> attempts to find the
authoritative name servers for the zone containing the name being
looked up and display the SOA record that each name server has for the
zone.</P
></DD
><DT
><TT
CLASS="OPTION"
>+[no]trace</TT
></DT
><DD
><P
>Toggle tracing of the delegation path from the root name servers for
the name being looked up. Tracing is disabled by default. When
tracing is enabled, <B
CLASS="COMMAND"
>dig</B
> makes iterative queries to
resolve the name being looked up. It will follow referrals from the
root servers, showing the answer from each server that was used to
resolve the lookup.</P
></DD
><DT
><TT
CLASS="OPTION"
>+[no]cmd</TT
></DT
><DD
><P
>toggles the printing of the initial comment in the output identifying
the version of <B
CLASS="COMMAND"
>dig</B
> and the query options that have
been applied. This comment is printed by default.</P
></DD
><DT
><TT
CLASS="OPTION"
>+[no]short</TT
></DT
><DD
><P
>Provide a terse answer. The default is to print the answer in a
verbose form.</P
></DD
><DT
><TT
CLASS="OPTION"
>+[no]identify</TT
></DT
><DD
><P
>Show [or do not show] the IP address and port number that supplied the
answer when the <TT
CLASS="PARAMETER"
><I
>+short</I
></TT
> option is enabled. If
short form answers are requested, the default is not to show the
source address and port number of the server that provided the answer.</P
></DD
><DT
><TT
CLASS="OPTION"
>+[no]comments</TT
></DT
><DD
><P
>Toggle the display of comment lines in the output. The default is to
print comments.</P
></DD
><DT
><TT
CLASS="OPTION"
>+[no]stats</TT
></DT
><DD
><P
>This query option toggles the printing of statistics: when the query
was made, the size of the reply and so on. The default behaviour is
to print the query statistics.</P
></DD
><DT
><TT
CLASS="OPTION"
>+[no]qr</TT
></DT
><DD
><P
>Print [do not print] the query as it is sent.
By default, the query is not printed.</P
></DD
><DT
><TT
CLASS="OPTION"
>+[no]question</TT
></DT
><DD
><P
>Print [do not print] the question section of a query when an answer is
returned. The default is to print the question section as a comment.</P
></DD
><DT
><TT
CLASS="OPTION"
>+[no]answer</TT
></DT
><DD
><P
>Display [do not display] the answer section of a reply. The default
is to display it.</P
></DD
><DT
><TT
CLASS="OPTION"
>+[no]authority</TT
></DT
><DD
><P
>Display [do not display] the authority section of a reply. The
default is to display it.</P
></DD
><DT
><TT
CLASS="OPTION"
>+[no]additional</TT
></DT
><DD
><P
>Display [do not display] the additional section of a reply.
The default is to display it.</P
></DD
><DT
><TT
CLASS="OPTION"
>+[no]all</TT
></DT
><DD
><P
>Set or clear all display flags.</P
></DD
><DT
><TT
CLASS="OPTION"
>+time=T</TT
></DT
><DD
><P
>&#13;Sets the timeout for a query to
<TT
CLASS="PARAMETER"
><I
>T</I
></TT
> seconds. The default time out is 5 seconds.
An attempt to set <TT
CLASS="PARAMETER"
><I
>T</I
></TT
> to less than 1 will result
in a query timeout of 1 second being applied.</P
></DD
><DT
><TT
CLASS="OPTION"
>+tries=T</TT
></DT
><DD
><P
>Sets the number of times to try UDP queries to server to
<TT
CLASS="PARAMETER"
><I
>T</I
></TT
> instead of the default, 3. If
<TT
CLASS="PARAMETER"
><I
>T</I
></TT
> is less than or equal to zero, the number of
tries is silently rounded up to 1.</P
></DD
><DT
><TT
CLASS="OPTION"
>+retry=T</TT
></DT
><DD
><P
>Sets the number of times to retry UDP queries to server to
<TT
CLASS="PARAMETER"
><I
>T</I
></TT
> instead of the default, 2. Unlike
<TT
CLASS="PARAMETER"
><I
>+tries</I
></TT
>, this does not include the initial
query.</P
></DD
><DT
><TT
CLASS="OPTION"
>+ndots=D</TT
></DT
><DD
><P
>Set the number of dots that have to appear in
<TT
CLASS="PARAMETER"
><I
>name</I
></TT
> to <TT
CLASS="PARAMETER"
><I
>D</I
></TT
> for it to be
considered absolute. The default value is that defined using the
ndots statement in <TT
CLASS="FILENAME"
>/etc/resolv.conf</TT
>, 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
<TT
CLASS="OPTION"
>search</TT
> or <TT
CLASS="OPTION"
>domain</TT
> directive in
<TT
CLASS="FILENAME"
>/etc/resolv.conf</TT
>.</P
></DD
><DT
><TT
CLASS="OPTION"
>+bufsize=B</TT
></DT
><DD
><P
>Set the UDP message buffer size advertised using EDNS0 to
<TT
CLASS="PARAMETER"
><I
>B</I
></TT
> bytes. The maximum and minimum sizes of this
buffer are 65535 and 0 respectively. Values outside this range are
rounded up or down appropriately.</P
></DD
><DT
><TT
CLASS="OPTION"
>+[no]multiline</TT
></DT
><DD
><P
>Print records like the SOA records in a verbose multi-line
format with human-readable comments. The default is to print
each record on a single line, to facilitate machine parsing
of the <B
CLASS="COMMAND"
>dig</B
> output.</P
></DD
><DT
><TT
CLASS="OPTION"
>+[no]fail</TT
></DT
><DD
><P
>Do not try the next server if you receive a SERVFAIL. The default is
to not try the next server which is the reverse of normal stub resolver
behaviour.</P
></DD
><DT
><TT
CLASS="OPTION"
>+[no]besteffort</TT
></DT
><DD
><P
>Attempt to display the contents of messages which are malformed.
The default is to not display malformed answers.</P
></DD
><DT
><TT
CLASS="OPTION"
>+[no]dnssec</TT
></DT
><DD
><P
>Requests DNSSEC records be sent by setting the DNSSEC OK bit (DO)
in the OPT record in the additional section of the query.</P
></DD
></DL
></DIV
>&#13;</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN355"
></A
><H2
>MULTIPLE QUERIES</H2
><P
>The BIND 9 implementation of <B
CLASS="COMMAND"
>dig </B
> supports
specifying multiple queries on the command line (in addition to
supporting the <TT
CLASS="OPTION"
>-f</TT
> batch file option). Each of those
queries can be supplied with its own set of flags, options and query
options.</P
><P
>In this case, each <TT
CLASS="PARAMETER"
><I
>query</I
></TT
> argument represent an
individual query in the command-line syntax described above. Each
consists of any of the standard options and flags, the name to be
looked up, an optional query type and class and any query options that
should be applied to that query.</P
><P
>A global set of query options, which should be applied to all queries,
can also be supplied. These global query options must precede the
first tuple of name, class, type, options, flags, and query options
supplied on the command line. Any global query options (except
the <TT
CLASS="OPTION"
>+[no]cmd</TT
> option) can be
overridden by a query-specific set of query options. For example:
<PRE
CLASS="PROGRAMLISTING"
>dig +qr www.isc.org any -x 127.0.0.1 isc.org ns +noqr</PRE
>
shows how <B
CLASS="COMMAND"
>dig</B
> could be used from the command line
to make three lookups: an ANY query for <TT
CLASS="LITERAL"
>www.isc.org</TT
>, a
reverse lookup of 127.0.0.1 and a query for the NS records of
<TT
CLASS="LITERAL"
>isc.org</TT
>.
A global query option of <TT
CLASS="PARAMETER"
><I
>+qr</I
></TT
> is applied, so
that <B
CLASS="COMMAND"
>dig</B
> shows the initial query it made for each
lookup. The final query has a local query option of
<TT
CLASS="PARAMETER"
><I
>+noqr</I
></TT
> which means that <B
CLASS="COMMAND"
>dig</B
>
will not print the initial query when it looks up the NS records for
<TT
CLASS="LITERAL"
>isc.org</TT
>.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN373"
></A
><H2
>FILES</H2
><P
><TT
CLASS="FILENAME"
>/etc/resolv.conf</TT
></P
><P
><TT
CLASS="FILENAME"
>${HOME}/.digrc</TT
></P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN379"
></A
><H2
>SEE ALSO</H2
><P
><SPAN
CLASS="CITEREFENTRY"
><SPAN
CLASS="REFENTRYTITLE"
>host</SPAN
>(1)</SPAN
>,
<SPAN
CLASS="CITEREFENTRY"
><SPAN
CLASS="REFENTRYTITLE"
>named</SPAN
>(8)</SPAN
>,
<SPAN
CLASS="CITEREFENTRY"
><SPAN
CLASS="REFENTRYTITLE"
>dnssec-keygen</SPAN
>(8)</SPAN
>,
<I
CLASS="CITETITLE"
>RFC1035</I
>.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN392"
></A
><H2
>BUGS </H2
><P
>There are probably too many query options. </P
></DIV
></BODY
></HTML
>