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freshclam: Setting up auto-updating</A> |
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<I>freshclam</I> is a default database updater for Clam AntiVirus.
It may work in two modes:
<UL>
<LI>interactively - from command line
</LI>
<LI>daemon - alone, silently
</LI>
</UL>
When started by a superuser it drops privileges and by default switches
to the <I>clamav</I> user. <I>freshclam</I> uses the
<TT><A NAME="tex2html13"
HREF="database.clamav.net">database.clamav.net</A></TT> round-robin DNS which automatically selects
a database mirror<A HREF="node14.html#mirrors">2.8</A>. freshclam is advanced tool: supports
proxy servers (with authentication), digital signature verification and
various error scenarious. <B>Quick test: run <I>freshclam</I> (as
a superuser) with no parameters and check the output.</B> If everythin
is OK, you may create a log file in /var/log (owned by <I>clamav</I> or
another user freshclam is running as (<I>-user</I>):
<PRE>
# touch /var/log/clam-update.log
# chmod 600 /var/log/clam-update.log
# chown clamav /var/log/clam-update.log
</PRE>
Now you can start <I>freshclam</I> in the daemon mode: |
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<PRE> |
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# freshclam -d -c 6 -l /var/log/clam-update.log
</PRE>
This enables checking for a new database six times per day (and this is a
minimal suggested value). You should add that line to your startup scripts.
The other way is to use the <I>cron</I> daemon. You have to add the
following line to the crontab of <B>root</B> or <B>clamav</B>:
<FONT SIZE="-1"> </FONT><PRE>
0 * * * * /usr/local/bin/freshclam --quiet -l /var/log/clam-update.log |
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</PRE> |
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to check for a new database every hour. To setup proxy support
you may set the environment variable <I>$http_proxy</I>: |
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<PRE> |
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export http_proxy="my.proxy.server:8080" |
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</PRE> |
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or use <I>-http-proxy</I> and <I>-proxy-user</I> options. |
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<ADDRESS>
Tomasz Kojm |
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2003-11-11 |
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