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<TITLE>Setting up auto-updating</TITLE>
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<H1><A NAME="SECTION00060000000000000000">
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<H2><A NAME="SECTION00054000000000000000">
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Setting up auto-updating</A>
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<code>freshclam</code> is the automatic database update tool for Clam AntiVirus.
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It can work in two modes:
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<LI>interactive - on demand from command line
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<LI>daemon - silently in the background
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<code>freshclam</code> is advanced tool: it supports scripted updates (instead
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of transferring the whole CVD file at each update it only transfers the
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differences between the latest and the current database via a special
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script), database version checks through DNS, proxy servers (with
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authentication), digital signatures and various error scenarios.
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<SPAN CLASS="textbf">Quick test: run freshclam (as superuser) with no parameters
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and check the output.</SPAN> If everything is OK you may create the log file in
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/var/log (owned by <SPAN CLASS="textit">clamav</SPAN> or another user <code>freshclam</code> will be
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# touch /var/log/freshclam.log
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# chmod 600 /var/log/freshclam.log
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# chown clamav /var/log/freshclam.log
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Now you <SPAN CLASS="textit">should</SPAN> edit the configuration file <code>freshclam.conf</code>
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and point the <SPAN CLASS="textit">UpdateLogFile</SPAN> directive to the log file. Finally, to
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run <code>freshclam</code> in the daemon mode, execute:
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The other way is to use the <SPAN CLASS="textit">cron</SPAN> daemon. You have to add the
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following line to the crontab of <SPAN CLASS="textbf">root</SPAN> or <SPAN CLASS="textbf">clamav</SPAN> user:
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<SMALL CLASS="SMALL"> </SMALL><PRE>
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N * * * * /usr/local/bin/freshclam --quiet
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to check for a new database every hour. <SPAN CLASS="textbf">N should be a
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number between 3 and 57 of your choice. Please don't choose any multiple
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of 10, because there are already too many clients using those time slots.</SPAN>
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Proxy settings are only configurable via the configuration file and
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<code>freshclam</code> will require strict permission settings for the config
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file when <code>HTTPProxyPassword</code> is turned on.
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HTTPProxyServer myproxyserver.com
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HTTPProxyUsername myusername
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HTTPProxyPassword mypass
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<!--Table of Child-Links-->
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<A NAME="CHILD_LINKS"><STRONG>Subsections</STRONG></A>
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<LI><A NAME="tex2html466"
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HREF="node23.html">Clam daemon</A>
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<LI><A NAME="tex2html467"
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HREF="node24.html">Clam<B>d</B>scan</A>
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<LI><A NAME="tex2html468"
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HREF="node25.html">Clamuko</A>
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<LI><A NAME="tex2html469"
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HREF="node26.html">Output format</A>
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<LI><A NAME="tex2html470"
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HREF="node27.html">clamscan</A>
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<LI><A NAME="tex2html471"
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HREF="node28.html">clamd</A>
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<LI><A NAME="tex2html478"
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HREF="node23.html">Closest mirrors</A>
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HREF="node17.html">Configuration</A>
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