man.host.html revision c8c33981e6b68e71ae09f549db5cbb5b3ee2d663
69fe9aaafdd6a141610e86a777d325db75422070Mark Andrews - Copyright (C) 2004, 2005 Internet Systems Consortium, Inc. ("ISC")
499b34cea04a46823d003d4c0520c8b03e8513cbBrian Wellington - Copyright (C) 2000-2003 Internet Software Consortium.
1378841691ad112fce2376d9f2e54e02676057d3Michael Sawyer - Permission to use, copy, modify, and distribute this software for any
1378841691ad112fce2376d9f2e54e02676057d3Michael Sawyer - purpose with or without fee is hereby granted, provided that the above
1378841691ad112fce2376d9f2e54e02676057d3Michael Sawyer - copyright notice and this permission notice appear in all copies.
dafcb997e390efa4423883dafd100c975c4095d6Mark Andrews - THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
dafcb997e390efa4423883dafd100c975c4095d6Mark Andrews - REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
dafcb997e390efa4423883dafd100c975c4095d6Mark Andrews - AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
dafcb997e390efa4423883dafd100c975c4095d6Mark Andrews - INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
dafcb997e390efa4423883dafd100c975c4095d6Mark Andrews - LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
dafcb997e390efa4423883dafd100c975c4095d6Mark Andrews - OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
dafcb997e390efa4423883dafd100c975c4095d6Mark Andrews - PERFORMANCE OF THIS SOFTWARE.
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f57cf8a2706c15bcb5fc1cb19faa0260b5111b0bMark Andrews<div class="cmdsynopsis"><p><code class="command">host</code> [<code class="option">-aCdlnrTwv</code>] [<code class="option">-c <em class="replaceable"><code>class</code></em></code>] [<code class="option">-N <em class="replaceable"><code>ndots</code></em></code>] [<code class="option">-R <em class="replaceable"><code>number</code></em></code>] [<code class="option">-t <em class="replaceable"><code>type</code></em></code>] [<code class="option">-W <em class="replaceable"><code>wait</code></em></code>] [<code class="option">-m <em class="replaceable"><code>flag</code></em></code>] [<code class="option">-4</code>] [<code class="option">-6</code>] {name} [server]</p></div>
1378841691ad112fce2376d9f2e54e02676057d3Michael Sawyer<p><span><strong class="command">host</strong></span>
1378841691ad112fce2376d9f2e54e02676057d3Michael Sawyer is a simple utility for performing DNS lookups.
1378841691ad112fce2376d9f2e54e02676057d3Michael Sawyer It is normally used to convert names to IP addresses and vice versa.
1378841691ad112fce2376d9f2e54e02676057d3Michael Sawyer When no arguments or options are given,
1378841691ad112fce2376d9f2e54e02676057d3Michael Sawyer <span><strong class="command">host</strong></span>
1378841691ad112fce2376d9f2e54e02676057d3Michael Sawyer prints a short summary of its command line arguments and options.
1378841691ad112fce2376d9f2e54e02676057d3Michael Sawyer<p><em class="parameter"><code>name</code></em> is the domain name that is to be
1378841691ad112fce2376d9f2e54e02676057d3Michael Sawyer up. It can also be a dotted-decimal IPv4 address or a colon-delimited
dd0fdd442633c66003c996ddf7dd229c8630ddc9Brian Wellington IPv6 address, in which case <span><strong class="command">host</strong></span> will by
dd0fdd442633c66003c996ddf7dd229c8630ddc9Brian Wellington perform a reverse lookup for that address.
c062bee4953be00fc5a04f023d5304810a171254Andreas Gustafsson <em class="parameter"><code>server</code></em> is an optional argument which
ab023a65562e62b85a824509d829b6fad87e00b1Rob Austein the name or IP address of the name server that <span><strong class="command">host</strong></span>
b6007467ebe8aaf72a1507d5da1b65b3ead5c7f3Andreas Gustafsson should query instead of the server or servers listed in
57b3597444bc8716459f0fb3022b2c12f4eee2aeAndreas Gustafsson <code class="filename">/etc/resolv.conf</code>.
1378841691ad112fce2376d9f2e54e02676057d3Michael Sawyer The <code class="option">-a</code> (all) option is equivalent to setting the
1378841691ad112fce2376d9f2e54e02676057d3Michael Sawyer <code class="option">-v</code> option and asking <span><strong class="command">host</strong></span> to make
40f53fa8d9c6a4fc38c0014495e7a42b08f52481David Lawrence a query of type ANY.
c062bee4953be00fc5a04f023d5304810a171254Andreas Gustafsson When the <code class="option">-C</code> option is used, <span><strong class="command">host</strong></span>
1378841691ad112fce2376d9f2e54e02676057d3Michael Sawyer will attempt to display the SOA records for zone
1378841691ad112fce2376d9f2e54e02676057d3Michael Sawyer <em class="parameter"><code>name</code></em> from all the listed
c062bee4953be00fc5a04f023d5304810a171254Andreas Gustafsson authoritative name
f57cf8a2706c15bcb5fc1cb19faa0260b5111b0bMark Andrews servers for that zone. The list of name servers is defined by the NS
use the IP6.INT domain as defined in RFC1886.
The default is to use IP6.ARPA.
The <code class="option">-4</code> option forces <span><strong class="command">host</strong></span> to only
starting serial number (e.g. -t IXFR=12345678).