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man: add man page decribing well known system credentials
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Lennart Poettering
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@ -1086,6 +1086,7 @@ manpages = [
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['systemd.special', '7', [], ''],
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['systemd.swap', '5', [], ''],
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['systemd.syntax', '7', [], ''],
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['systemd.system-credentials', '7', [], ''],
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['systemd.target', '5', [], ''],
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['systemd.time', '7', [], ''],
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['systemd.timer', '5', [], ''],
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192
man/systemd.system-credentials.xml
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192
man/systemd.system-credentials.xml
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@ -0,0 +1,192 @@
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<?xml version='1.0'?> <!--*-nxml-*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
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<refentry id="systemd.system-credentials">
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<refentryinfo>
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<title>systemd.system-credentials</title>
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<productname>systemd</productname>
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</refentryinfo>
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<refmeta>
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<refentrytitle>systemd.system-credentials</refentrytitle>
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<manvolnum>7</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>systemd.system-credentials</refname>
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<refpurpose>System Credentials</refpurpose>
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</refnamediv>
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<refsect1>
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<title>Description</title>
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<para><ulink url="https://systemd.io/CREDENTIALS">System and Service Credentials</ulink> are data objects
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that may be passed into booted systems or system services as they are invoked. They can be acquired from
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various external sources, and propagated into the system and from there into system services. Credentials
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may optionally be encrypted with a machine-specific key and/or locked to the local TPM2 device, and are
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only decrypted when the consuming service is invoked.</para>
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<para>System credentials may be used to provision and configure various aspects of the system. Depending
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on the consuming component credentials are only used on initial invocations or are needed for all
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invocations.</para>
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<para>Credentials may be used for any kind of data, binary or text, and may carry passwords, secrets,
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certificates, cryptographic key material, identity information, configuration, and more.</para>
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</refsect1>
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<refsect1>
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<title>Well known system credentials</title>
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<variablelist>
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<varlistentry>
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<term><varname>firstboot.keymap</varname></term>
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<listitem>
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<para>The console key mapping to set (e.g. <literal>de</literal>). Read by
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<citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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and only honoured if no console keymap has been configured before.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>firstboot.locale</varname></term>
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<term><varname>firstboot.locale-message</varname></term>
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<listitem>
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<para>The system locale to set (e.g. <literal>de_DE.UTF-8</literal>). Read by
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<citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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and only honoured if no locale has been configured before. <varname>firstboot.locale</varname> sets
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<literal>LANG</literal>, while <varname>firstboot.locale-message</varname> sets
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<literal>LC_MESSAGES</literal>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>firstboot.timezone</varname></term>
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<listitem>
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<para>The system timezone to set (e.g. <literal>Europe/Berlin</literal>). Read by
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<citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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and only honoured if no system timezone has been configured before.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>login.issue</varname></term>
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<listitem>
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<para>The data of this credential is written to
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<filename>/etc/issue.d/50-provision.conf</filename>, if the file doesn't exist
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yet. <citerefentry><refentrytitle>agetty</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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reads this file and shows its contents at the login prompt of terminal logins. See <citerefentry
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project='man-pages'><refentrytitle>issue</refentrytitle><manvolnum>5</manvolnum></citerefentry> for
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details.</para>
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<para>Consumed by <filename>/usr/lib/tmpfiles.d/provision.conf</filename>, see
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<citerefentry><refentrytitle>tmpfiles.d</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>login.motd</varname></term>
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<listitem>
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<para>The data of this credential is written to <filename>/etc/motd.d/50-provision.conf</filename>,
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if the file doesn't exist
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yet. <citerefentry><refentrytitle>pam_motd</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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reads this file and shows its contents as "message of the day" during terminal logins. See
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<citerefentry
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project='man-pages'><refentrytitle>motd</refentrytitle><manvolnum>5</manvolnum></citerefentry> for
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details.</para>
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<para>Consumed by <filename>/usr/lib/tmpfiles.d/provision.conf</filename>, see
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<citerefentry><refentrytitle>tmpfiles.d</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>network.hosts</varname></term>
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<listitem>
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<para>The data of this credential is written to <filename>/etc/hosts</filename>, if the file
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doesn't exist yet. See <citerefentry
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project='man-pages'><refentrytitle>hosts</refentrytitle><manvolnum>5</manvolnum></citerefentry> for
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details.</para>
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<para>Consumed by <filename>/usr/lib/tmpfiles.d/provision.conf</filename>, see
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<citerefentry><refentrytitle>tmpfiles.d</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>passwd.hashed-password.root</varname></term>
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<term><varname>passwd.plaintext-password.root</varname></term>
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<listitem>
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<para>May contain the password (either in UNIX hashed format, or in plaintext) for the root users.
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Read by both
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<citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry>
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and
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<citerefentry><refentrytitle>systemd-sysusers</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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and only honoured if no root password has been configured before.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>passwd.shell.root</varname></term>
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<listitem>
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<para>The path to the shell program (e.g. <literal>/bin/bash</literal>) for the root user. Read by
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both
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<citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry>
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and
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<citerefentry><refentrytitle>systemd-sysusers</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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and only honoured if no root shell has been configured before.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>ssh.authorized_keys.root</varname></term>
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<listitem>
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<para>The data of this credential is written to <filename>/root/.ssh/authorized_keys</filename>, if
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the file doesn't exist yet. This allows provisioning SSH access for the system's root user.</para>
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<para>Consumed by <filename>/usr/lib/tmpfiles.d/provision.conf</filename>, see
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<citerefentry><refentrytitle>tmpfiles.d</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>sysusers.extra</varname></term>
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<listitem>
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<para>Additional
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<citerefentry><refentrytitle>sysusers.d</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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lines to process during boot.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>sysctl.extra</varname></term>
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<listitem>
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<para>Additional
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<citerefentry><refentrytitle>sysctl.d</refentrytitle><manvolnum>5</manvolnum></citerefentry> lines
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to process during boot.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>tmpfiles.extra</varname></term>
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<listitem>
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<para>Additional
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<citerefentry><refentrytitle>tmpfiles.d</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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lines to process during boot.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<para>
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>kernel-command-line</refentrytitle><manvolnum>7</manvolnum></citerefentry>
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</para>
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</refsect1>
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</refentry>
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