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man: document all kernel command line options we understand
2012-06-22 03:35:52 +04:00
<?xml version='1.0'?> <!--*-nxml-*-->
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
man: revert dynamic paths for split-usr setups This did not really work out as we had hoped. Trying to do this upstream introduced several problems that probably makes it better suited as a downstream patch after all. At any rate, it is not releaseable in the current state, so we at least need to revert this before the release. * by adjusting the path to binaries, but not do the same thing to the search path we end up with inconsistent man-pages. Adjusting the search path too would be quite messy, and it is not at all obvious that this is worth the effort, but at any rate it would have to be done before we could ship this. * this means that distributed man-pages does not make sense as they depend on config options, and for better or worse we are still distributing man pages, so that is something that definitely needs sorting out before we could ship with this patch. * we have long held that split-usr is only minimally supported in order to boot, and something we hope will eventually go away. So before we start adding even more magic/effort in order to make this work nicely, we should probably question if it makes sense at all.
2015-06-18 20:47:44 +03:00
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
man: document all kernel command line options we understand
2012-06-22 03:35:52 +04:00
<!--
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="kernel-command-line">
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<refentryinfo>
<title>kernel-command-line</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>kernel-command-line</refentrytitle>
<manvolnum>7</manvolnum>
</refmeta>
<refnamediv>
<refname>kernel-command-line</refname>
<refpurpose>Kernel command line parameters</refpurpose>
</refnamediv>
<refsynopsisdiv>
<para><filename>/proc/cmdline</filename></para>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>The kernel, the initial RAM disk (initrd) and
basic userspace functionality may be configured at boot via
kernel command line arguments.</para>
<para>For command line parameters understood by the kernel, please
see <ulink
url="https://www.kernel.org/doc/Documentation/kernel-parameters.txt"><filename>kernel-parameters.txt</filename></ulink>
and
<citerefentry project='man-pages'><refentrytitle>bootparam</refentrytitle><manvolnum>7</manvolnum></citerefentry>.</para>
<para>For command line parameters understood by the initial RAM
disk, please see
<citerefentry project='die-net'><refentrytitle>dracut.cmdline</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
or the documentation of the specific initrd implementation of your
installation.</para>
</refsect1>
<refsect1>
<title>Core OS Command Line Arguments</title>
<variablelist class='kernel-commandline-options'>
<varlistentry>
<term><varname>systemd.unit=</varname></term>
<term><varname>rd.systemd.unit=</varname></term>
<term><varname>systemd.dump_core=</varname></term>
<term><varname>systemd.crash_shell=</varname></term>
<term><varname>systemd.crash_chvt=</varname></term>
<term><varname>systemd.confirm_spawn=</varname></term>
<term><varname>systemd.show_status=</varname></term>
<term><varname>systemd.log_target=</varname></term>
<term><varname>systemd.log_level=</varname></term>
<term><varname>systemd.log_color=</varname></term>
<term><varname>systemd.log_location=</varname></term>
<term><varname>systemd.default_standard_output=</varname></term>
<term><varname>systemd.default_standard_error=</varname></term>
<term><varname>systemd.setenv=</varname></term>
<listitem>
<para>Parameters understood by the system and service
manager to control system behavior. For details, see
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>systemd.mask=</varname></term>
<term><varname>systemd.wants=</varname></term>
<term><varname>systemd.debug-shell</varname></term>
<listitem>
<para>Additional parameters understood by
<citerefentry><refentrytitle>systemd-debug-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
to mask or start specific units at boot, or invoke a debug
shell on tty9.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>systemd.restore_state=</varname></term>
<listitem>
<para>This parameter is understood by several system tools
to control whether or not they should restore system state
from the previous boot. For details, see
<citerefentry><refentrytitle>systemd-backlight@.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
and
<citerefentry><refentrytitle>systemd-rfkill@.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>quiet</varname></term>
<listitem>
<para>Parameter understood by both the kernel and the system
and service manager to control console log verbosity. For
details, see
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>debug</varname></term>
<listitem>
<para>Parameter understood by both the kernel and the system
and service manager to control console log verbosity. For
details, see
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>-b</varname></term>
<term><varname>emergency</varname></term>
<term><varname>rescue</varname></term>
<term><varname>single</varname></term>
<term><varname>s</varname></term>
<term><varname>S</varname></term>
<term><varname>1</varname></term>
<term><varname>2</varname></term>
<term><varname>3</varname></term>
<term><varname>4</varname></term>
<term><varname>5</varname></term>
<listitem>
<para>Parameters understood by the system and service
manager, as compatibility options. For details, see
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>locale.LANG=</varname></term>
<term><varname>locale.LANGUAGE=</varname></term>
<term><varname>locale.LC_CTYPE=</varname></term>
<term><varname>locale.LC_NUMERIC=</varname></term>
<term><varname>locale.LC_TIME=</varname></term>
<term><varname>locale.LC_COLLATE=</varname></term>
<term><varname>locale.LC_MONETARY=</varname></term>
<term><varname>locale.LC_MESSAGES=</varname></term>
<term><varname>locale.LC_PAPER=</varname></term>
<term><varname>locale.LC_NAME=</varname></term>
<term><varname>locale.LC_ADDRESS=</varname></term>
<term><varname>locale.LC_TELEPHONE=</varname></term>
<term><varname>locale.LC_MEASUREMENT=</varname></term>
<term><varname>locale.LC_IDENTIFICATION=</varname></term>
<listitem>
<para>Parameters understood by the system and service
manager to control locale and language settings. For
details, see
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>fsck.mode=</varname></term>
<term><varname>fsck.repair=</varname></term>
<listitem>
<para>Parameters understood by the file system checker
services. For details, see
<citerefentry><refentrytitle>systemd-fsck@.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>quotacheck.mode=</varname></term>
<listitem>
<para>Parameter understood by the file quota checker
service. For details, see
<citerefentry><refentrytitle>systemd-quotacheck.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>systemd.journald.forward_to_syslog=</varname></term>
<term><varname>systemd.journald.forward_to_kmsg=</varname></term>
<term><varname>systemd.journald.forward_to_console=</varname></term>
<term><varname>systemd.journald.forward_to_wall=</varname></term>
<listitem>
<para>Parameters understood by the journal service. For
details, see
<citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>vconsole.keymap=</varname></term>
<term><varname>vconsole.keymap.toggle=</varname></term>
<term><varname>vconsole.font=</varname></term>
<term><varname>vconsole.font.map=</varname></term>
<term><varname>vconsole.font.unimap=</varname></term>
<listitem>
<para>Parameters understood by the virtual console setup
logic. For details, see
<citerefentry><refentrytitle>systemd-vconsole-setup.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>udev.log-priority=</varname></term>
<term><varname>rd.udev.log-priority=</varname></term>
<term><varname>udev.children-max=</varname></term>
<term><varname>rd.udev.children-max=</varname></term>
<term><varname>udev.exec-delay=</varname></term>
<term><varname>rd.udev.exec-delay=</varname></term>
<term><varname>udev.event-timeout=</varname></term>
<term><varname>rd.udev.event-timeout=</varname></term>
<term><varname>net.ifnames=</varname></term>
<listitem>
<para>Parameters understood by the device event managing
daemon. For details, see
<citerefentry><refentrytitle>systemd-udevd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>plymouth.enable=</varname></term>
<listitem>
<para>May be used to disable the Plymouth boot splash. For
details, see
<citerefentry project='die-net'><refentrytitle>plymouth</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>luks=</varname></term>
<term><varname>rd.luks=</varname></term>
<term><varname>luks.crypttab=</varname></term>
<term><varname>rd.luks.crypttab=</varname></term>
<term><varname>luks.name=</varname></term>
<term><varname>rd.luks.name=</varname></term>
<term><varname>luks.uuid=</varname></term>
<term><varname>rd.luks.uuid=</varname></term>
<term><varname>luks.options=</varname></term>
<term><varname>rd.luks.options=</varname></term>
<term><varname>luks.key=</varname></term>
<term><varname>rd.luks.key=</varname></term>
<listitem>
<para>Configures the LUKS full-disk encryption logic at
boot. For details, see
<citerefentry><refentrytitle>systemd-cryptsetup-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>fstab=</varname></term>
<term><varname>rd.fstab=</varname></term>
<listitem>
<para>Configures the <filename>/etc/fstab</filename> logic
at boot. For details, see
<citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>root=</varname></term>
<term><varname>rootfstype=</varname></term>
man: remove 'fs' from 'rootfsflags' rootfsflags does not appear anywhere else.
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<term><varname>rootflags=</varname></term>
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<term><varname>ro</varname></term>
<term><varname>rw</varname></term>
<listitem>
<para>Configures the root file system and its file system
type and mount options, as well as whether it shall be
mounted read-only or read-writable initially. For details,
see
<citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>systemd.gpt_auto=</varname></term>
<term><varname>rd.systemd.gpt_auto=</varname></term>
<listitem>
<para>Configures whether GPT based partition auto-discovery
shall be attempted. For details, see
<citerefentry><refentrytitle>systemd-gpt-auto-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>modules-load=</varname></term>
<term><varname>rd.modules-load=</varname></term>
<listitem>
<para>Load a specific kernel module early at boot. For
details, see
<citerefentry><refentrytitle>systemd-modules-load.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>resume=</varname></term>
<listitem>
<para>Enables resume from hibernation using the specified
device. All
man: fix a bunch of links All hail linkchecker!
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<citerefentry project='man-pages'><refentrytitle>fstab</refentrytitle><manvolnum>5</manvolnum></citerefentry>-like
Reindent man pages to 2ch
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paths are supported. For details, see
<citerefentry><refentrytitle>systemd-hibernate-resume-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry project='man-pages'><refentrytitle>bootparam</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
<citerefentry project='die-net'><refentrytitle>dracut.cmdline</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-debug-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-fsck@.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-quotacheck.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-vconsole-setup.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-udevd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry project='die-net'><refentrytitle>plymouth</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-cryptsetup-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-gpt-auto-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-modules-load.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-backlight@.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-rfkill@.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-hibernate-resume-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>
</para>
</refsect1>
man: document all kernel command line options we understand
2012-06-22 03:35:52 +04:00
</refentry>
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