2012-06-22 03:35:52 +04:00
<?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: / / w w w . g n u . o r g / l i c e n s e s /> .
-->
<refentry id= "kernel-command-line" >
<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>
2012-07-16 20:08:25 +04:00
<refpurpose > Kernel command line parameters</refpurpose>
2012-06-22 03:35:52 +04:00
</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
2012-06-22 18:57:01 +04:00
url="https://www.kernel.org/doc/Documentation/kernel-parameters.txt"><filename > kernel-parameters.txt</filename> </ulink>
and
<citerefentry > <refentrytitle > bootparam</refentrytitle> <manvolnum > 7</manvolnum> </citerefentry> .</para>
2012-06-22 03:35:52 +04:00
<para > For command line paramaters understood by the
initial RAM disk, please see
2012-06-22 18:29:26 +04:00
<citerefentry > <refentrytitle > dracut.cmdline</refentrytitle> <manvolnum > 7</manvolnum> </citerefentry> ,
or the documentation of the specific initrd
implementation of your installation.</para>
2012-06-22 03:35:52 +04:00
</refsect1>
<refsect1 >
<title > Core OS Command Line Arguments</title>
<variablelist >
<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 behaviour. For details see
<citerefentry > <refentrytitle > systemd</refentrytitle> <manvolnum > 1</manvolnum> </citerefentry> .</para>
</listitem>
</varlistentry>
<varlistentry >
<term > <varname > quiet</varname> </term>
<listitem >
2012-06-22 03:38:42 +04:00
<para > Parameter understood by
2012-06-22 03:35:52 +04:00
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 > emergency</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>
<listitem >
2012-06-22 03:38:42 +04:00
<para > Parameter understood by
2012-06-22 03:35:52 +04:00
the file system checker
services. For details see
2012-06-27 02:37:36 +04:00
<citerefentry > <refentrytitle > systemd-fsck@.service</refentrytitle> <manvolnum > 8</manvolnum> </citerefentry> .</para>
2012-06-22 03:35:52 +04:00
</listitem>
</varlistentry>
<varlistentry >
<term > <varname > quotacheck.mode=</varname> </term>
<listitem >
2012-06-22 03:38:42 +04:00
<para > Parameter understood by
2012-06-22 03:35:52 +04:00
the file quota checker
service. For details see
2012-06-25 15:47:45 +04:00
<citerefentry > <refentrytitle > systemd-quotacheck.service</refentrytitle> <manvolnum > 8</manvolnum> </citerefentry> .</para>
2012-06-22 03:35:52 +04:00
</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>
<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>
2012-06-22 12:11:06 +04:00
<term > <varname > udev.children-max=</varname> </term>
2012-06-22 03:35:52 +04:00
<term > <varname > rd.udev.children-max=</varname> </term>
2012-06-22 13:39:04 +04:00
<term > <varname > udev.exec-delay=</varname> </term>
<term > <varname > rd.udev.exec-delay=</varname> </term>
2012-06-22 03:35:52 +04:00
<listitem >
<para > Parameters understood by
the device event managing daemon. For
details see
2012-06-22 18:57:13 +04:00
<citerefentry > <refentrytitle > systemd-udevd.service</refentrytitle> <manvolnum > 8</manvolnum> </citerefentry> .</para>
2012-06-22 03:35:52 +04:00
</listitem>
</varlistentry>
2012-06-22 12:11:06 +04:00
<varlistentry >
<term > <varname > plymouth.enable=</varname> </term>
<listitem >
<para > May be used to disable
the Plymouth boot splash. For
details see
<citerefentry > <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.uuid=</varname> </term>
<term > <varname > rd.luks.uuid=</varname> </term>
<listitem >
<para > Configures the LUKS
full-disk encryption logic at
boot. For details see
2012-06-22 12:27:05 +04:00
<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>
2012-06-22 12:11:06 +04:00
</listitem>
</varlistentry>
2012-06-22 13:39:04 +04:00
<varlistentry >
2012-07-04 03:12:25 +04:00
<term > <varname > modules-load=</varname> </term>
<term > <varname > rd.modules-load=</varname> </term>
2012-06-22 13:39:04 +04:00
<listitem >
<para > Load a specific kernel
2012-06-22 15:45:29 +04:00
module early at boot. For
2012-06-22 13:39:04 +04:00
details see
<citerefentry > <refentrytitle > systemd-modules-load.service</refentrytitle> <manvolnum > 8</manvolnum> </citerefentry> .</para>
</listitem>
</varlistentry>
2012-06-22 12:11:06 +04:00
</variablelist>
2012-06-22 03:35:52 +04:00
</refsect1>
<refsect1 >
<title > See Also</title>
<para >
<citerefentry > <refentrytitle > systemd</refentrytitle> <manvolnum > 1</manvolnum> </citerefentry> ,
2012-06-22 18:59:32 +04:00
<citerefentry > <refentrytitle > bootparam</refentrytitle> <manvolnum > 7</manvolnum> </citerefentry> ,
2012-06-22 03:35:52 +04:00
<citerefentry > <refentrytitle > dracut.cmdline</refentrytitle> <manvolnum > 7</manvolnum> </citerefentry> ,
2012-06-27 02:37:36 +04:00
<citerefentry > <refentrytitle > systemd-fsck@.service</refentrytitle> <manvolnum > 8</manvolnum> </citerefentry> ,
2012-06-25 15:47:45 +04:00
<citerefentry > <refentrytitle > systemd-quotacheck.service</refentrytitle> <manvolnum > 8</manvolnum> </citerefentry> ,
2012-06-22 03:35:52 +04:00
<citerefentry > <refentrytitle > systemd-journald.service</refentrytitle> <manvolnum > 8</manvolnum> </citerefentry> ,
<citerefentry > <refentrytitle > systemd-vconsole-setup.service</refentrytitle> <manvolnum > 8</manvolnum> </citerefentry> ,
2012-06-22 18:57:13 +04:00
<citerefentry > <refentrytitle > systemd-udevd.service</refentrytitle> <manvolnum > 8</manvolnum> </citerefentry> ,
2012-06-22 12:13:50 +04:00
<citerefentry > <refentrytitle > plymouth</refentrytitle> <manvolnum > 8</manvolnum> </citerefentry> ,
2012-06-22 18:59:32 +04:00
<citerefentry > <refentrytitle > systemd-cryptsetup-generator</refentrytitle> <manvolnum > 8</manvolnum> </citerefentry> ,
<citerefentry > <refentrytitle > systemd-fstab-generator</refentrytitle> <manvolnum > 8</manvolnum> </citerefentry> ,
<citerefentry > <refentrytitle > systemd-modules-load.service</refentrytitle> <manvolnum > 8</manvolnum> </citerefentry>
2012-06-22 03:35:52 +04:00
</para>
</refsect1>
</refentry>