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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
10
11 systemd is free software; you can redistribute it and/or modify it
12 under the terms of the GNU Lesser General Public License as published by
13 the Free Software Foundation; either version 2.1 of the License, or
14 (at your option) any later version.
15
16 systemd is distributed in the hope that it will be useful, but
17 WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 Lesser General Public License for more details.
20
21 You should have received a copy of the GNU Lesser General Public License
22 along with systemd; If not, see <http://www.gnu.org/licenses/>.
23-->
c35b956d 24<refentry id="systemd-random-seed.service" conditional='ENABLE_RANDOMSEED'>
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26 <refentryinfo>
27 <title>systemd-random-seed.service</title>
28 <productname>systemd</productname>
edcf89be 29
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30 <authorgroup>
31 <author>
32 <contrib>Developer</contrib>
33 <firstname>Lennart</firstname>
34 <surname>Poettering</surname>
35 <email>lennart@poettering.net</email>
36 </author>
37 </authorgroup>
38 </refentryinfo>
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40 <refmeta>
41 <refentrytitle>systemd-random-seed.service</refentrytitle>
42 <manvolnum>8</manvolnum>
43 </refmeta>
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45 <refnamediv>
46 <refname>systemd-random-seed.service</refname>
47 <refname>systemd-random-seed</refname>
48 <refpurpose>Load and save the system random seed at boot and shutdown</refpurpose>
49 </refnamediv>
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51 <refsynopsisdiv>
52 <para><filename>systemd-random-seed.service</filename></para>
621a2c80 53 <para><filename>/usr/lib/systemd/random-seed</filename></para>
798d3a52 54 </refsynopsisdiv>
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56 <refsect1>
57 <title>Description</title>
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798d3a52 59 <para><filename>systemd-random-seed.service</filename> is a
b938cb90 60 service that restores the random seed of the system at early boot
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61 and saves it at shutdown. See
62 <citerefentry><refentrytitle>random</refentrytitle><manvolnum>4</manvolnum></citerefentry>
63 for details. Saving/restoring the random seed across boots
64 increases the amount of available entropy early at boot. On disk
65 the random seed is stored in
66 <filename>/var/lib/systemd/random-seed</filename>.</para>
67 </refsect1>
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69 <refsect1>
70 <title>See Also</title>
71 <para>
72 <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
73 <citerefentry><refentrytitle>random</refentrytitle><manvolnum>4</manvolnum></citerefentry>
74 </para>
75 </refsect1>
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76
77</refentry>