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git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@2287 af4574ff-66df-0310-9fd7-8a98e5e911e0
33 lines
1.4 KiB
XML
33 lines
1.4 KiB
XML
<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
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"http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
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<!ENTITY % general-entities SYSTEM "../../general.ent">
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%general-entities;
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]>
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<sect1 id="postlfs-config-random" xreflabel="random">
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<?dbhtml filename="random.html"?>
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<title>Random number generation</title>
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<para>The Linux kernel supplies a random number generator which is accessed
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through <filename class="devicefile">/dev/random</filename> and
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<filename class="devicefile">/dev/urandom</filename>. Programs that utilize
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the random and urandom devices, such as <application>OpenSSH</application>,
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will benefit from these instructions.</para>
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<para>When a Linux system starts up without much operator interaction, the
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entropy pool, data used to compute a random number, may be in a fairly
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predictable state. This creates the real possibility that the number generated
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at startup may always be the same. In order to counteract this effect,
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you should carry the entropy pool information across your shut-downs and
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start-ups.</para>
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<para>Install the <filename>/etc/rc.d/init.d/random</filename>
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init script included with the
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<xref linkend="intro-important-bootscripts"/> package.</para>
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<screen><userinput><command>make install-random</command></userinput></screen>
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</sect1>
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