<?xml version="1.0"?> <!--*-nxml-*--> <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> <!-- This file is part of systemd. Copyright 2012 Lennart Poettering systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. --> <refentry id="systemd-random-seed.service" conditional='ENABLE_RANDOMSEED'> <refentryinfo> <title>systemd-random-seed.service</title> <productname>systemd</productname> <authorgroup> <author> <contrib>Developer</contrib> <firstname>Lennart</firstname> <surname>Poettering</surname> <email>lennart@poettering.net</email> </author> </authorgroup> </refentryinfo> <refmeta> <refentrytitle>systemd-random-seed.service</refentrytitle> <manvolnum>8</manvolnum> </refmeta> <refnamediv> <refname>systemd-random-seed.service</refname> <refname>systemd-random-seed</refname> <refpurpose>Load and save the system random seed at boot and shutdown</refpurpose> </refnamediv> <refsynopsisdiv> <para><filename>systemd-random-seed.service</filename></para> <para><filename>/usr/lib/systemd/systemd-random-seed</filename></para> </refsynopsisdiv> <refsect1> <title>Description</title> <para><filename>systemd-random-seed.service</filename> is a service that restores the random seed of the system at early-boot and saves it at shutdown. See <citerefentry><refentrytitle>random</refentrytitle><manvolnum>4</manvolnum></citerefentry> for details. Saving/restoring the random seed across boots increases the amount of available entropy early at boot. On disk the random seed is stored in <filename>/var/lib/random-seed</filename>.</para> </refsect1> <refsect1> <title>See Also</title> <para> <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, <citerefentry><refentrytitle>random</refentrytitle><manvolnum>4</manvolnum></citerefentry> </para> </refsect1> </refentry>