source: postlfs/config/random.xml@ f1ce80b

10.0 10.1 11.0 7.10 8.0 8.1 8.2 8.3 8.4 9.0 9.1 basic bdubbs/svn elogind ken/refactor-virt lazarus nosym perl-modules qt5new trunk xry111/git-date xry111/git-date-for-trunk xry111/git-date-test
Last change on this file since f1ce80b was f1ce80b, checked in by DJ Lucas <dj@…>, 5 years ago

[systemd-merge] - Section II layout

git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@17433 af4574ff-66df-0310-9fd7-8a98e5e911e0

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1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3 "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
4 <!ENTITY % general-entities SYSTEM "../../general.ent">
5 %general-entities;
6]>
7
8<sect1 id="postlfs-config-random" xreflabel="Random number generation" revision="sysv">
9 <?dbhtml filename="random.html"?>
10
11 <sect1info>
12 <othername>$LastChangedBy$</othername>
13 <date>$Date$</date>
14 </sect1info>
15
16 <title>Random Number Generation</title>
17
18 <indexterm zone="postlfs-config-random">
19 <primary sortas="f-random">random</primary>
20 </indexterm>
21
22 <para>The Linux kernel supplies a random number generator which is accessed
23 through <filename class="devicefile">/dev/random</filename> and
24 <filename class="devicefile">/dev/urandom</filename>. Programs that utilize
25 the random and urandom devices, such as <application>OpenSSH</application>,
26 will benefit from these instructions.</para>
27
28 <para>When a Linux system starts up without much operator interaction, the
29 entropy pool (data used to compute a random number) may be in a fairly
30 predictable state. This creates the real possibility that the number generated
31 at startup may always be the same. In order to counteract this effect,
32 you should carry the entropy pool information across your shut-downs and
33 start-ups.</para>
34
35 <para>Install the <filename>/etc/rc.d/init.d/random</filename> init script
36 included with the <xref linkend="bootscripts"/> package.</para>
37
38<screen role="root"><userinput>make install-random</userinput></screen>
39
40</sect1>
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