180 lines
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180 lines
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<meta name="abstract" content="This topic helps you to understand the files Domain Name System (DNS) uses and review guidelines for backing up and maintaining them." />
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<title>Maintain Domain Name System configuration files</title>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Maintain Domain Name System configuration files</h1>
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<div><p>This topic helps you to understand the files Domain Name System
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(DNS) uses and review guidelines for backing up and maintaining them.</p>
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<div class="section"><p>You can use i5/OS™ DNS to create and manage DNS server instances
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on your iSeries™.
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The configuration files for DNS are managed by iSeries Navigator. You should not manually
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edit the files. Always use iSeries Navigator to create, change, or delete DNS
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configuration files. DNS configuration files are stored in the integrated
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file system paths listed below.</p>
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<div class="note"><span class="notetitle">Note:</span> The file structure below applies
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to DNS running on BIND 8. If you are using DNS based on BIND 4.9.3, see <a href="http://publib.boulder.ibm.com/pubs/html/as400/v4r5/ic2924/info/RZAISBACKUPDN.HTM" target="_blank">Backing up DNS configuration files and maintaining log files</a> in
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the V4R5 DNS Information Center topic.</div>
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<p>In the following table, files
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are listed in the hierarchy of paths shown. Files with a save icon <img src="rzakk505.gif" alt="File backup recommended." /> should be backed
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up to protect data. Files with a delete icon <img src="rzakk506.gif" alt="Delete file on regular basis." /> should be deleted on a regular basis.</p>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" frame="border" border="1" rules="all"><thead align="left"><tr><th valign="top" id="d0e57">Name</th>
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<th valign="top" id="d0e59"> Icon</th>
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<th valign="top" id="d0e61">Description</th>
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</tr>
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</thead>
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<tbody><tr><td valign="top" headers="d0e57 "><strong>QIBM/UserData/OS400/DNS/</strong></td>
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<td valign="top" headers="d0e59 "> </td>
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<td valign="top" headers="d0e61 ">Starting point directory for DNS.</td>
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</tr>
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<tr><td valign="top" headers="d0e57 ">ATTRIBUTES</td>
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<td valign="top" headers="d0e59 "><br /><img src="rzakk505.gif" alt="File backup recommended." /><br /></td>
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<td valign="top" headers="d0e61 ">DNS uses this file to determine which BIND version you are using.</td>
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</tr>
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<tr><td valign="top" headers="d0e57 "><strong>QIBM/UserData/OS400/DNS/ <em><instance-n></em>/</strong></td>
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<td valign="top" headers="d0e59 "> </td>
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<td valign="top" headers="d0e61 ">Starting point directory for a DNS instance.</td>
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</tr>
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<tr><td valign="top" headers="d0e57 ">ATTRIBUTES</td>
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<td valign="top" headers="d0e59 "><br /><img src="rzakk505.gif" alt="File backup recommended." /><br /></td>
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<td valign="top" headers="d0e61 ">Configuration attributes used by iSeries DNS.</td>
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</tr>
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<tr><td valign="top" headers="d0e57 ">NAMED.CONF</td>
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<td valign="top" headers="d0e59 "><br /><img src="rzakk505.gif" alt="File backup recommended." /><br /></td>
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<td valign="top" headers="d0e61 ">This file contains configuration data. Used to tell the server what
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specific zones it is managing, where the zone files are, which zones can be
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dynamically updated, where its forwarding servers are, and other option settings.</td>
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</tr>
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<tr><td valign="top" headers="d0e57 ">BOOT.AS400BIND4</td>
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<td valign="top" headers="d0e59 "><br /><img src="rzakk505.gif" alt="File backup recommended." /><br /> </td>
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<td valign="top" headers="d0e61 ">BIND 4.9.3 server configuration and policies file that is converted
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to the BIND 8 NAMED.CONF file for this instance. This file is created if you
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migrate a BIND 4.9.3 server to BIND 8. It serves as a backup for migration,
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and can be deleted when the BIND 8 server is working properly.</td>
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</tr>
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<tr><td valign="top" headers="d0e57 ">NAMED.CA</td>
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<td valign="top" headers="d0e59 "><br /><img src="rzakk505.gif" alt="File backup recommended." /><br /></td>
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<td valign="top" headers="d0e61 ">List of root servers for this server instance.</td>
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</tr>
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<tr><td valign="top" headers="d0e57 ">NAMED_DUMP.DB</td>
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<td valign="top" headers="d0e59 "><br /><img src="rzakk506.gif" alt="Delete file on regular basis." /><br /> </td>
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<td valign="top" headers="d0e61 ">Server data dump created for the active server database.</td>
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</tr>
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<tr><td valign="top" headers="d0e57 ">NAMED.STATS</td>
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<td valign="top" headers="d0e59 "><br /><img src="rzakk506.gif" alt="Delete file on regular basis." /><br /></td>
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<td valign="top" headers="d0e61 ">Server statistics.</td>
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</tr>
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<tr><td valign="top" headers="d0e57 ">NAMED.PID</td>
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<td valign="top" headers="d0e59 "> </td>
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<td valign="top" headers="d0e61 ">Holds Process ID of running server. This file is created each time
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the DNS server is started. It is used for the Database, Statistics, and Update
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server functions. Do not delete or edit this file.</td>
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</tr>
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<tr><td valign="top" headers="d0e57 ">QUERYLOG</td>
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<td valign="top" headers="d0e59 "><br /><img src="rzakk506.gif" alt="Delete file on regular basis." /><br /></td>
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<td valign="top" headers="d0e61 ">The DNS server log of queries received. The file is created when the
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DNS server log is active. When active, this file becomes large and it should
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be deleted on a regular basis.</td>
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</tr>
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<tr><td valign="top" headers="d0e57 "><em><zone-name-a></em>.DB</td>
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<td valign="top" headers="d0e59 "><br /><img src="rzakk505.gif" alt="File backup recommended." /><br /></td>
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<td valign="top" headers="d0e61 ">Zone file for a particular domain to be served by this server. Contains
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all of the resource records for this zone.</td>
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</tr>
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<tr><td valign="top" headers="d0e57 "><em><zone-name-b></em>.DB</td>
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<td valign="top" headers="d0e59 "><br /><img src="rzakk505.gif" alt="File backup recommended." /><br /></td>
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<td valign="top" headers="d0e61 ">Zone file for a particular domain to be served by this server. Contains
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all of the resource records for this zone. Each zone has a separate .DB file.</td>
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</tr>
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<tr><td valign="top" headers="d0e57 ">*.ixfr.*</td>
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<td valign="top" headers="d0e59 "><br /><img src="rzakk506.gif" alt="Delete file on regular basis." /><br /></td>
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<td valign="top" headers="d0e61 ">Incremental zone transfer (IXFR) files. These files are used by secondary
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servers to load only changed data since the last zone transfer. As updates
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are made, the number of IXFR files will grow. You should periodically delete
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the older IXFR files. Leaving files that were created within a day or two
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will allow most secondaries to still load IXFRs. If you delete all of the
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files, the secondary will request a full transfer (AXFR).</td>
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</tr>
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<tr><td valign="top" headers="d0e57 ">TMP</td>
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<td valign="top" headers="d0e59 "> </td>
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<td valign="top" headers="d0e61 ">Directory used by server instance for creating temporary work files.</td>
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</tr>
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<tr><td valign="top" headers="d0e57 "><strong>QIBM/UserData/OS400/DNS/TMP</strong></td>
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<td valign="top" headers="d0e59 "> </td>
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<td valign="top" headers="d0e61 ">Temp directory used by QTOBH2N program to create intermediate files
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dumped from the host table for later import using iSeries Navigator.</td>
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</tr>
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<tr><td valign="top" headers="d0e57 "><strong>QIBM/UserData/OS400/DNS/_DYN/</strong></td>
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<td valign="top" headers="d0e59 "> </td>
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<td valign="top" headers="d0e61 ">Directory that holds files required for dynamic updates.</td>
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</tr>
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<tr><td valign="top" headers="d0e57 "><em><key_id-name-x></em>._KID</td>
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<td valign="top" headers="d0e59 "><br /><img src="rzakk505.gif" alt="File backup recommended." /><br /></td>
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<td valign="top" headers="d0e61 ">File containing a BIND 8 key statement for the key_id named <em><key_id-name-x></em>.</td>
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</tr>
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<tr><td valign="top" headers="d0e57 "><em><key_id-name-x></em>._DUK. <em><zone-name-a></em></td>
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<td valign="top" headers="d0e59 "><br /><img src="rzakk505.gif" alt="File backup recommended." /><br /> </td>
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<td valign="top" headers="d0e61 ">Dynamic update key required to initiate a dynamic update request to <em><zone-name-a></em> using
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the <em><key_id-name-x></em> key.</td>
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</tr>
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<tr><td valign="top" headers="d0e57 "><em><key_id-name-y></em>._KID</td>
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<td valign="top" headers="d0e59 "><br /><img src="rzakk505.gif" alt="File backup recommended." /><br /> </td>
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<td valign="top" headers="d0e61 ">File containing a BIND 8 key statement for the key_id named <em><key_id-name-y></em>.</td>
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</tr>
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<tr><td valign="top" headers="d0e57 "><em><key_id-name-y></em>._DUK. <em><zone-name-a></em></td>
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<td valign="top" headers="d0e59 "><br /><img src="rzakk505.gif" alt="File backup recommended." /><br /></td>
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<td valign="top" headers="d0e61 ">Dynamic update key required to initiate a dynamic update request to <em><zone-name-a></em> using
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the <em><key_id-name-y></em> key.</td>
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</tr>
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<tr><td valign="top" headers="d0e57 "><em><key_id-name-y></em>._DUK. <em><zone-name-b></em></td>
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<td valign="top" headers="d0e59 "><br /><img src="rzakk505.gif" alt="File backup recommended." /><br /></td>
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<td valign="top" headers="d0e61 ">Dynamic update key required to initiate a dynamic update request to <em><zone-name-b></em> using
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the <em><key_id-name-y></em> key.</td>
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</tr>
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</tbody>
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</table>
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</div>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzakkmanaging.htm" title="This topic discusses how to verify Domain Name System (DNS) function, monitor performance, and maintain DNS data and files.">Manage Domain Name System</a></div>
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</div>
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<div class="relconcepts"><strong>Related concepts</strong><br />
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<div><a href="rzakkplanningauthority.htm" title="There are special authorization requirements for the Domain Name System (DNS) administrator. You should also consider security implications of authorization.">Determine Domain Name System authorities</a></div>
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<div><a href="rzakkmanagingstats.htm" title="Database dump and statistics tools can help you review and manage server performance.">Access Domain Name System server statistics</a></div>
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</div>
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<div class="reltasks"><strong>Related tasks</strong><br />
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<div><a href="rzakkconfignamesrvr.htm" title="Domain Name System (DNS) allows you to create multiple name server instances. This topic provides instructions for configuring a name server.">Configure name servers</a></div>
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</div>
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</div>
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