dig.html

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<dt><span class="term"><code class="option">+[no]cdflag</code></span></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><span class="term"><code class="option">+[no]cl</code></span></dt>
<dd><p>
Display [do not display] the CLASS when printing the record.
</p></dd>
<dt><span class="term"><code class="option">+[no]ttlid</code></span></dt>
<dd><p>
Display [do not display] the TTL when printing the record.
</p></dd>
<dt><span class="term"><code class="option">+[no]recurse</code></span></dt>
<dd><p>
Toggle the setting of the RD (recursion desired) bit in the query.
This bit is set by default, which means <span><strong class="command">dig</strong></span>
normally sends recursive queries.  Recursion is automatically disabled
when the <em class="parameter"><code>+nssearch</code></em> or
<em class="parameter"><code>+trace</code></em> query options are used.
</p></dd>
<dt><span class="term"><code class="option">+[no]nssearch</code></span></dt>
<dd><p>
When this option is set, <span><strong class="command">dig</strong></span> 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><span class="term"><code class="option">+[no]trace</code></span></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, <span><strong class="command">dig</strong></span> 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><span class="term"><code class="option">+[no]cmd</code></span></dt>
<dd><p>
toggles the printing of the initial comment in the output identifying
the version of <span><strong class="command">dig</strong></span> and the query options that have
been applied.  This comment is printed by default.
</p></dd>
<dt><span class="term"><code class="option">+[no]short</code></span></dt>
<dd><p>
Provide a terse answer.  The default is to print the answer in a
verbose form.
</p></dd>
<dt><span class="term"><code class="option">+[no]identify</code></span></dt>
<dd><p>
Show [or do not show] the IP address and port number that supplied the
answer when the <em class="parameter"><code>+short</code></em> 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><span class="term"><code class="option">+[no]comments</code></span></dt>
<dd><p>
Toggle the display of comment lines in the output.  The default is to
print comments.
</p></dd>
<dt><span class="term"><code class="option">+[no]stats</code></span></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><span class="term"><code class="option">+[no]qr</code></span></dt>
<dd><p>
Print [do not print] the query as it is sent.
By default, the query is not printed.
</p></dd>
<dt><span class="term"><code class="option">+[no]question</code></span></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><span class="term"><code class="option">+[no]answer</code></span></dt>
<dd><p>
Display [do not display] the answer section of a reply.  The default
is to display it.
</p></dd>
<dt><span class="term"><code class="option">+[no]authority</code></span></dt>
<dd><p>
Display [do not display] the authority section of a reply.  The
default is to display it.
</p></dd>
<dt><span class="term"><code class="option">+[no]additional</code></span></dt>
<dd><p>
Display [do not display] the additional section of a reply.
The default is to display it.
</p></dd>
<dt><span class="term"><code class="option">+[no]all</code></span></dt>
<dd><p>
Set or clear all display flags.
</p></dd>
<dt><span class="term"><code class="option">+time=T</code></span></dt>
<dd><p>

Sets the timeout for a query to
<em class="parameter"><code>T</code></em> seconds.  The default time out is 5 seconds.
An attempt to set <em class="parameter"><code>T</code></em> to less than 1 will result
in a query timeout of 1 second being applied.
</p></dd>
<dt><span class="term"><code class="option">+tries=T</code></span></dt>
<dd><p>
Sets the number of times to try UDP queries to server to
<em class="parameter"><code>T</code></em> instead of the default, 3.  If
<em class="parameter"><code>T</code></em> is less than or equal to zero, the number of
tries is silently rounded up to 1.
</p></dd>
<dt><span class="term"><code class="option">+retry=T</code></span></dt>
<dd><p>
Sets the number of times to retry UDP queries to server to
<em class="parameter"><code>T</code></em> instead of the default, 2.  Unlike
<em class="parameter"><code>+tries</code></em>, this does not include the initial
query.
</p></dd>
<dt><span class="term"><code class="option">+ndots=D</code></span></dt>
<dd><p>
Set the number of dots that have to appear in
<em class="parameter"><code>name</code></em> to <em class="parameter"><code>D</code></em> for it to be
considered absolute.  The default value is that defined using the
ndots statement in <code class="filename">/etc/resolv.conf</code>, 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
<code class="option">search</code> or <code class="option">domain</code> directive in
<code class="filename">/etc/resolv.conf</code>.
</p></dd>
<dt><span class="term"><code class="option">+bufsize=B</code></span></dt>
<dd><p>
Set the UDP message buffer size advertised using EDNS0 to
<em class="parameter"><code>B</code></em> 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><span class="term"><code class="option">+[no]multiline</code></span></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 <span><strong class="command">dig</strong></span> output.
</p></dd>
<dt><span class="term"><code class="option">+[no]fail</code></span></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><span class="term"><code class="option">+[no]besteffort</code></span></dt>
<dd><p>
Attempt to display the contents of messages which are malformed.
The default is to not display malformed answers.
</p></dd>
<dt><span class="term"><code class="option">+[no]dnssec</code></span></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>
<dt><span class="term"><code class="option">+[no]sigchase</code></span></dt>
<dd><p>
Chase DNSSEC signature chains.  Requires dig be compiled with
-DDIG_SIGCHASE.
</p></dd>
<dt><span class="term"><code class="option">+trusted-key=####</code></span></dt>
<dd>
<p>
	      Specifies a file containing trusted keys to be used with
	      <code class="option">+sigchase</code>.  Each DNSKEY record must be
	      on its own line.
	    </p>
<p>
	      If not specified <span><strong class="command">dig</strong></span> will look for
	      <code class="filename">/etc/trusted-key.key</code> then
	      <code class="filename">trusted-key.key</code> in the current directory.
	    </p>
<p>
	      Requires dig be compiled with -DDIG_SIGCHASE.
	    </p>
</dd>
<dt><span class="term"><code class="option">+[no]topdown</code></span></dt>
<dd><p>
When chasing DNSSEC signature chains perform a top down validation.
Requires dig be compiled with -DDIG_SIGCHASE.
</p></dd>
</dl></div>
<p>

</p>
</div>
<div class="refsect1" lang="en">
<a name="id2527033"></a><h2>MULTIPLE QUERIES</h2>
<p>
The BIND 9 implementation of <span><strong class="command">dig </strong></span> supports
specifying multiple queries on the command line (in addition to
supporting the <code class="option">-f</code> 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 <em class="parameter"><code>query</code></em> 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 <code class="option">+[no]cmd</code> option) can be
overridden by a query-specific set of query options.  For example:
</p>
<pre class="programlisting">
dig +qr www.isc.org any -x 127.0.0.1 isc.org ns +noqr
</pre>
<p>
shows how <span><strong class="command">dig</strong></span> could be used from the command line
to make three lookups: an ANY query for <code class="literal">www.isc.org</code>, a
reverse lookup of 127.0.0.1 and a query for the NS records of
<code class="literal">isc.org</code>.

A global query option of <em class="parameter"><code>+qr</code></em> is applied, so
that <span><strong class="command">dig</strong></span> shows the initial query it made for each
lookup.  The final query has a local query option of
<em class="parameter"><code>+noqr</code></em> which means that <span><strong class="command">dig</strong></span>
will not print the initial query when it looks up the NS records for
<code class="literal">isc.org</code>.
</p>
</div>
<div class="refsect1" lang="en">
<a name="id2527092"></a><h2>FILES</h2>
<p>
<code class="filename">/etc/resolv.conf</code>
</p>
<p>
<code class="filename">${HOME}/.digrc</code>
</p>
</div>
<div class="refsect1" lang="en">
<a name="id2527111"></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>,
<em class="citetitle">RFC1035</em>.
</p>
</div>
<div class="refsect1" lang="en">
<a name="id2527149"></a><h2>BUGS </h2>
<p>
There are probably too many query options. 
</p>
</div>
</div></body>
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