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1<?xml version="1.0"?>
2<!--*-nxml-*-->
12b42c76 3<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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5 SPDX-License-Identifier: LGPL-2.1+
6
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7 This file is part of systemd.
8
9 Copyright 2012 Lennart Poettering
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c35b956d 11<refentry id="systemd-random-seed.service" conditional='ENABLE_RANDOMSEED'>
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13 <refentryinfo>
14 <title>systemd-random-seed.service</title>
15 <productname>systemd</productname>
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17 <authorgroup>
18 <author>
19 <contrib>Developer</contrib>
20 <firstname>Lennart</firstname>
21 <surname>Poettering</surname>
22 <email>lennart@poettering.net</email>
23 </author>
24 </authorgroup>
25 </refentryinfo>
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27 <refmeta>
28 <refentrytitle>systemd-random-seed.service</refentrytitle>
29 <manvolnum>8</manvolnum>
30 </refmeta>
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32 <refnamediv>
33 <refname>systemd-random-seed.service</refname>
34 <refname>systemd-random-seed</refname>
35 <refpurpose>Load and save the system random seed at boot and shutdown</refpurpose>
36 </refnamediv>
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38 <refsynopsisdiv>
39 <para><filename>systemd-random-seed.service</filename></para>
621a2c80 40 <para><filename>/usr/lib/systemd/random-seed</filename></para>
798d3a52 41 </refsynopsisdiv>
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43 <refsect1>
44 <title>Description</title>
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798d3a52 46 <para><filename>systemd-random-seed.service</filename> is a
b938cb90 47 service that restores the random seed of the system at early boot
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48 and saves it at shutdown. See
49 <citerefentry><refentrytitle>random</refentrytitle><manvolnum>4</manvolnum></citerefentry>
50 for details. Saving/restoring the random seed across boots
51 increases the amount of available entropy early at boot. On disk
52 the random seed is stored in
53 <filename>/var/lib/systemd/random-seed</filename>.</para>
54 </refsect1>
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56 <refsect1>
57 <title>See Also</title>
58 <para>
59 <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
60 <citerefentry><refentrytitle>random</refentrytitle><manvolnum>4</manvolnum></citerefentry>
61 </para>
62 </refsect1>
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63
64</refentry>