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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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- Copyright (C) 2008-2012, 2014-2016 Internet Systems Consortium, Inc. ("ISC")
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- This Source Code Form is subject to the terms of the Mozilla Public
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<html lang="en">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>dnssec-dsfromkey</title>
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<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
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</head>
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="refentry">
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<a name="man.dnssec-dsfromkey"></a><div class="titlepage"></div>
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<div class="refnamediv">
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<h2>Name</h2>
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<p>
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<span class="application">dnssec-dsfromkey</span>
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— DNSSEC DS RR generation tool
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</p>
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</div>
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<div class="refsynopsisdiv">
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<h2>Synopsis</h2>
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<div class="cmdsynopsis"><p>
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<code class="command">dnssec-dsfromkey</code>
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[<code class="option">-v <em class="replaceable"><code>level</code></em></code>]
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[<code class="option">-1</code>]
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[<code class="option">-2</code>]
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[<code class="option">-a <em class="replaceable"><code>alg</code></em></code>]
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[<code class="option">-C</code>]
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[<code class="option">-l <em class="replaceable"><code>domain</code></em></code>]
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[<code class="option">-T <em class="replaceable"><code>TTL</code></em></code>]
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{keyfile}
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</p></div>
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<div class="cmdsynopsis"><p>
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<code class="command">dnssec-dsfromkey</code>
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{-s}
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[<code class="option">-1</code>]
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[<code class="option">-2</code>]
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[<code class="option">-a <em class="replaceable"><code>alg</code></em></code>]
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[<code class="option">-K <em class="replaceable"><code>directory</code></em></code>]
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[<code class="option">-l <em class="replaceable"><code>domain</code></em></code>]
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[<code class="option">-s</code>]
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[<code class="option">-c <em class="replaceable"><code>class</code></em></code>]
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[<code class="option">-T <em class="replaceable"><code>TTL</code></em></code>]
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[<code class="option">-f <em class="replaceable"><code>file</code></em></code>]
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[<code class="option">-A</code>]
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[<code class="option">-v <em class="replaceable"><code>level</code></em></code>]
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{dnsname}
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</p></div>
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<div class="cmdsynopsis"><p>
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<code class="command">dnssec-dsfromkey</code>
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[<code class="option">-h</code>]
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[<code class="option">-V</code>]
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</p></div>
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</div>
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<div class="refsection">
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<a name="id-1.7"></a><h2>DESCRIPTION</h2>
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<p><span class="command"><strong>dnssec-dsfromkey</strong></span>
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outputs the Delegation Signer (DS) resource record (RR), as defined in
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RFC 3658 and RFC 4509, for the given key(s).
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</p>
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</div>
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<div class="refsection">
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<a name="id-1.8"></a><h2>OPTIONS</h2>
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<div class="variablelist"><dl class="variablelist">
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<dt><span class="term">-1</span></dt>
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<dd>
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<p>
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Use SHA-1 as the digest algorithm (the default is to use
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both SHA-1 and SHA-256).
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</p>
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</dd>
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<dt><span class="term">-2</span></dt>
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<dd>
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<p>
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Use SHA-256 as the digest algorithm.
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</p>
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</dd>
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<dt><span class="term">-a <em class="replaceable"><code>algorithm</code></em></span></dt>
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<dd>
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<p>
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Select the digest algorithm. The value of
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<code class="option">algorithm</code> must be one of SHA-1 (SHA1),
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SHA-256 (SHA256), GOST or SHA-384 (SHA384).
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These values are case insensitive.
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</p>
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</dd>
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<dt><span class="term">-C</span></dt>
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<dd>
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<p>
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Generate CDS records rather than DS records. This is mutually
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exclusive with generating lookaside records.
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</p>
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</dd>
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<dt><span class="term">-T <em class="replaceable"><code>TTL</code></em></span></dt>
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<dd>
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<p>
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Specifies the TTL of the DS records.
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</p>
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</dd>
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<dt><span class="term">-K <em class="replaceable"><code>directory</code></em></span></dt>
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<dd>
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<p>
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Look for key files (or, in keyset mode,
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<code class="filename">keyset-</code> files) in
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<code class="option">directory</code>.
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</p>
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</dd>
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<dt><span class="term">-f <em class="replaceable"><code>file</code></em></span></dt>
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<dd>
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<p>
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Zone file mode: in place of the keyfile name, the argument is
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the DNS domain name of a zone master file, which can be read
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from <code class="option">file</code>. If the zone name is the same as
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<code class="option">file</code>, then it may be omitted.
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</p>
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<p>
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If <code class="option">file</code> is set to <code class="literal">"-"</code>, then
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the zone data is read from the standard input. This makes it
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possible to use the output of the <span class="command"><strong>dig</strong></span>
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command as input, as in:
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</p>
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<p>
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<strong class="userinput"><code>dig dnskey example.com | dnssec-dsfromkey -f - example.com</code></strong>
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</p>
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</dd>
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<dt><span class="term">-A</span></dt>
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<dd>
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<p>
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Include ZSKs when generating DS records. Without this option,
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only keys which have the KSK flag set will be converted to DS
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records and printed. Useful only in zone file mode.
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</p>
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</dd>
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<dt><span class="term">-l <em class="replaceable"><code>domain</code></em></span></dt>
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<dd>
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<p>
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Generate a DLV set instead of a DS set. The specified
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<code class="option">domain</code> is appended to the name for each
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record in the set.
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The DNSSEC Lookaside Validation (DLV) RR is described
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in RFC 4431. This is mutually exclusive with generating
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CDS records.
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</p>
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</dd>
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<dt><span class="term">-s</span></dt>
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<dd>
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<p>
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Keyset mode: in place of the keyfile name, the argument is
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the DNS domain name of a keyset file.
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</p>
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</dd>
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<dt><span class="term">-c <em class="replaceable"><code>class</code></em></span></dt>
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<dd>
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<p>
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Specifies the DNS class (default is IN). Useful only
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in keyset or zone file mode.
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</p>
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</dd>
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<dt><span class="term">-v <em class="replaceable"><code>level</code></em></span></dt>
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<dd>
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<p>
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Sets the debugging level.
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</p>
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</dd>
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<dt><span class="term">-h</span></dt>
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<dd>
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<p>
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Prints usage information.
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</p>
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</dd>
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<dt><span class="term">-V</span></dt>
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<dd>
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<p>
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Prints version information.
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</p>
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</dd>
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</dl></div>
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</div>
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<div class="refsection">
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<a name="id-1.9"></a><h2>EXAMPLE</h2>
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<p>
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To build the SHA-256 DS RR from the
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<strong class="userinput"><code>Kexample.com.+003+26160</code></strong>
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keyfile name, the following command would be issued:
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</p>
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<p><strong class="userinput"><code>dnssec-dsfromkey -2 Kexample.com.+003+26160</code></strong>
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</p>
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<p>
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The command would print something like:
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</p>
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<p><strong class="userinput"><code>example.com. IN DS 26160 5 2 3A1EADA7A74B8D0BA86726B0C227AA85AB8BBD2B2004F41A868A54F0 C5EA0B94</code></strong>
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</p>
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</div>
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<div class="refsection">
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<a name="id-1.10"></a><h2>FILES</h2>
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<p>
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The keyfile can be designed by the key identification
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<code class="filename">Knnnn.+aaa+iiiii</code> or the full file name
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<code class="filename">Knnnn.+aaa+iiiii.key</code> as generated by
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<span class="refentrytitle">dnssec-keygen</span>(8).
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</p>
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<p>
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The keyset file name is built from the <code class="option">directory</code>,
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the string <code class="filename">keyset-</code> and the
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<code class="option">dnsname</code>.
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</p>
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</div>
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<div class="refsection">
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<a name="id-1.11"></a><h2>CAVEAT</h2>
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<p>
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A keyfile error can give a "file not found" even if the file exists.
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</p>
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</div>
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<div class="refsection">
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<a name="id-1.12"></a><h2>SEE ALSO</h2>
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<p><span class="citerefentry">
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<span class="refentrytitle">dnssec-keygen</span>(8)
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</span>,
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<span class="citerefentry">
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<span class="refentrytitle">dnssec-signzone</span>(8)
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</span>,
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<em class="citetitle">BIND 9 Administrator Reference Manual</em>,
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<em class="citetitle">RFC 3658</em>,
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<em class="citetitle">RFC 4431</em>.
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<em class="citetitle">RFC 4509</em>.
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</p>
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</div>
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