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c76806a968
git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@2250 af4574ff-66df-0310-9fd7-8a98e5e911e0
58 lines
1.8 KiB
XML
58 lines
1.8 KiB
XML
<sect2>
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<title>Configuring <application><acronym>NTP</acronym></application></title>
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<sect3><title>Config files</title>
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<para><filename>/etc/ntp.conf</filename></para>
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</sect3>
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<sect3><title>Configuration Information</title>
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<para>The following configuration file defines various <acronym>NTP</acronym>
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stratum 2 servers with open access from different continents. It also
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creates a drift file where <command>ntpd</command> stores the frequency
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offset. Since the documentation included with the package is sparse,
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visit the <acronym>NTP</acronym> website at
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<ulink url="http://www.ntp.org/"/> for more information.</para>
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<screen><userinput><command>cat > /etc/ntp.conf << "EOF"</command>
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# Africa
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server tock.nml.csir.co.za
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# Asia
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server ntp.shim.org
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# Australia
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server ntp.saard.net
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# Europe
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server ntp.tuxfamily.net
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# North America
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server clock.psu.edu
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driftfile /var/cache/ntp.drift
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<command>EOF</command></userinput></screen>
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</sect3>
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<sect3><title>Synchronizing the time</title>
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<para>There are two options. Option one is to run <command>ntpd</command>
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continuously and allow it to synchronize the time in a gradual manner. The other
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option is to run <command>ntpd</command> periodically (using cron)
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and update the time each time <command>ntpd</command> is scheduled.</para>
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<para>If you choose Option one, then install the
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<filename>/etc/rc.d/init.d/ntp</filename>
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init script included in the
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<xref linkend="intro-important-bootscripts"/> package.</para>
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<screen><userinput><command>make install-ntp</command></userinput></screen>
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<para>If you prefer to run ntpd periodically, add the following command to
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root's <filename>crontab</filename>:</para>
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<screen><userinput>ntpd -q</userinput></screen>
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</sect3>
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</sect2>
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