2012-06-22 03:35:52 +04:00
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<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>
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<refpurpose > Kernel command line parameters</refpurpose>
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</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
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kernel, please see <ulink
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url="https://www.kernel.org/doc/Documentation/kernel-parameters.txt"><filename > kernel-parameters.txt</filename> </ulink>
and
man: add a mapping for external manpages
It is annoying when we have dead links on fd.o.
Add project='man-pages|die-net|archlinux' to <citerefentry>-ies.
In generated html, add external links to
http://man7.org/linux/man-pages/man, http://linux.die.net/man/,
https://www.archlinux.org/.
By default, pages in sections 2 and 4 go to man7, since Michael
Kerrisk is the autorative source on kernel related stuff.
The rest of links goes to linux.die.net, because they have the
manpages.
Except for the pacman stuff, since it seems to be only available from
archlinux.org.
Poor gummiboot gets no link, because gummitboot(8) ain't to be found
on the net. According to common wisdom, that would mean that it does
not exist. But I have seen Kay using it, so I know it does, and
deserves to be found. Can somebody be nice and put it up somewhere?
2014-07-08 02:25:54 +04:00
<citerefentry project= 'man-pages' > <refentrytitle > bootparam</refentrytitle> <manvolnum > 7</manvolnum> </citerefentry> .</para>
2012-06-22 03:35:52 +04:00
2012-11-29 23:06:57 +04:00
<para > For command line parameters understood by the
2012-06-22 03:35:52 +04:00
initial RAM disk, please see
man: add a mapping for external manpages
It is annoying when we have dead links on fd.o.
Add project='man-pages|die-net|archlinux' to <citerefentry>-ies.
In generated html, add external links to
http://man7.org/linux/man-pages/man, http://linux.die.net/man/,
https://www.archlinux.org/.
By default, pages in sections 2 and 4 go to man7, since Michael
Kerrisk is the autorative source on kernel related stuff.
The rest of links goes to linux.die.net, because they have the
manpages.
Except for the pacman stuff, since it seems to be only available from
archlinux.org.
Poor gummiboot gets no link, because gummitboot(8) ain't to be found
on the net. According to common wisdom, that would mean that it does
not exist. But I have seen Kay using it, so I know it does, and
deserves to be found. Can somebody be nice and put it up somewhere?
2014-07-08 02:25:54 +04:00
<citerefentry project= 'die-net' > <refentrytitle > dracut.cmdline</refentrytitle> <manvolnum > 7</manvolnum> </citerefentry> ,
2012-06-22 18:29:26 +04:00
or the documentation of the specific initrd
implementation of your installation.</para>
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</refsect1>
<refsect1 >
<title > Core OS Command Line Arguments</title>
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<variablelist class= 'kernel-commandline-options' >
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<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
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to control system behavior. For details, see
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<citerefentry > <refentrytitle > systemd</refentrytitle> <manvolnum > 1</manvolnum> </citerefentry> .</para>
</listitem>
</varlistentry>
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<varlistentry >
<term > <varname > systemd.mask=</varname> </term>
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<term > <varname > systemd.wants=</varname> </term>
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<term > <varname > systemd.debug-shell</varname> </term>
<listitem >
<para > Additional parameters
understood by
<citerefentry > <refentrytitle > systemd-debug-generator</refentrytitle> <manvolnum > 8</manvolnum> </citerefentry> ,
2014-06-20 15:30:52 +04:00
to mask or start specific
units at boot, or invoke a
debug shell on tty9.</para>
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</listitem>
</varlistentry>
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<varlistentry >
<term > <varname > systemd.restore_state=</varname> </term>
<listitem >
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<para > This parameter is understood by
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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>
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<varlistentry >
<term > <varname > quiet</varname> </term>
<listitem >
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<para > Parameter understood by
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both the kernel and the system
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and service manager to control
console log verbosity. For
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details, see
2013-05-29 16:09:56 +04:00
<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
2012-06-22 03:35:52 +04:00
and service manager to control
console log verbosity. For
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details, see
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<citerefentry > <refentrytitle > systemd</refentrytitle> <manvolnum > 1</manvolnum> </citerefentry> .</para>
</listitem>
</varlistentry>
<varlistentry >
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<term > <varname > -b</varname> </term>
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<term > <varname > emergency</varname> </term>
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<term > <varname > rescue</varname> </term>
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<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
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options. For details, see
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<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
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settings. For details, see
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<citerefentry > <refentrytitle > systemd</refentrytitle> <manvolnum > 1</manvolnum> </citerefentry> .</para>
</listitem>
</varlistentry>
<varlistentry >
<term > <varname > fsck.mode=</varname> </term>
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<term > <varname > fsck.repair=</varname> </term>
<listitem >
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<para > Parameters understood by
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the file system checker
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services. For details, see
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<citerefentry > <refentrytitle > systemd-fsck@.service</refentrytitle> <manvolnum > 8</manvolnum> </citerefentry> .</para>
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</listitem>
</varlistentry>
<varlistentry >
<term > <varname > quotacheck.mode=</varname> </term>
<listitem >
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<para > Parameter understood by
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the file quota checker
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service. For details, see
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<citerefentry > <refentrytitle > systemd-quotacheck.service</refentrytitle> <manvolnum > 8</manvolnum> </citerefentry> .</para>
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</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>
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<term > <varname > systemd.journald.forward_to_wall=</varname> </term>
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<listitem >
<para > Parameters understood by
the journal service. For
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details, see
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<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
2013-07-02 07:44:04 +04:00
details, see
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<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>
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<term > <varname > udev.children-max=</varname> </term>
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<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>
2014-10-23 08:12:50 +04:00
<term > <varname > udev.event-timeout=</varname> </term>
<term > <varname > rd.udev.event-timeout=</varname> </term>
2013-05-23 05:11:29 +04:00
<term > <varname > net.ifnames=</varname> </term>
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<listitem >
<para > Parameters understood by
the device event managing daemon. For
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details, see
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<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
2013-07-02 07:44:04 +04:00
details, see
man: add a mapping for external manpages
It is annoying when we have dead links on fd.o.
Add project='man-pages|die-net|archlinux' to <citerefentry>-ies.
In generated html, add external links to
http://man7.org/linux/man-pages/man, http://linux.die.net/man/,
https://www.archlinux.org/.
By default, pages in sections 2 and 4 go to man7, since Michael
Kerrisk is the autorative source on kernel related stuff.
The rest of links goes to linux.die.net, because they have the
manpages.
Except for the pacman stuff, since it seems to be only available from
archlinux.org.
Poor gummiboot gets no link, because gummitboot(8) ain't to be found
on the net. According to common wisdom, that would mean that it does
not exist. But I have seen Kay using it, so I know it does, and
deserves to be found. Can somebody be nice and put it up somewhere?
2014-07-08 02:25:54 +04:00
<citerefentry project= 'die-net' > <refentrytitle > plymouth</refentrytitle> <manvolnum > 8</manvolnum> </citerefentry> .</para>
2012-06-22 12:11:06 +04:00
</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>
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<term > <varname > luks.options=</varname> </term>
<term > <varname > rd.luks.options=</varname> </term>
2013-04-11 17:44:33 +04:00
<term > <varname > luks.key=</varname> </term>
<term > <varname > rd.luks.key=</varname> </term>
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<listitem >
<para > Configures the LUKS
full-disk encryption logic at
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boot. For details, see
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<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>
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logic at boot. For details, see
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<citerefentry > <refentrytitle > systemd-fstab-generator</refentrytitle> <manvolnum > 8</manvolnum> </citerefentry> .</para>
2012-06-22 12:11:06 +04:00
</listitem>
</varlistentry>
2014-06-19 18:54:40 +04:00
<varlistentry >
<term > <varname > root=</varname> </term>
<term > <varname > rootfstype=</varname> </term>
<term > <varname > rootfsflags=</varname> </term>
<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>
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
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module early at boot. For
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details, see
2012-06-22 13:39:04 +04:00
<citerefentry > <refentrytitle > systemd-modules-load.service</refentrytitle> <manvolnum > 8</manvolnum> </citerefentry> .</para>
</listitem>
</varlistentry>
2014-08-27 00:17:45 +04:00
<varlistentry >
<term > <varname > resume=</varname> </term>
<listitem >
<para > Enables resume from hibernation
using the specified device.
All <citerefentry > <refentrytitle > fstab</refentrytitle> <manvolnum > 5</manvolnum> </citerefentry> -like
2014-08-30 19:13:16 +04:00
paths are supported. For details, see
2014-08-27 00:17:45 +04:00
<citerefentry > <refentrytitle > systemd-hibernate-resume-generator</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> ,
man: add a mapping for external manpages
It is annoying when we have dead links on fd.o.
Add project='man-pages|die-net|archlinux' to <citerefentry>-ies.
In generated html, add external links to
http://man7.org/linux/man-pages/man, http://linux.die.net/man/,
https://www.archlinux.org/.
By default, pages in sections 2 and 4 go to man7, since Michael
Kerrisk is the autorative source on kernel related stuff.
The rest of links goes to linux.die.net, because they have the
manpages.
Except for the pacman stuff, since it seems to be only available from
archlinux.org.
Poor gummiboot gets no link, because gummitboot(8) ain't to be found
on the net. According to common wisdom, that would mean that it does
not exist. But I have seen Kay using it, so I know it does, and
deserves to be found. Can somebody be nice and put it up somewhere?
2014-07-08 02:25:54 +04:00
<citerefentry project= 'man-pages' > <refentrytitle > bootparam</refentrytitle> <manvolnum > 7</manvolnum> </citerefentry> ,
<citerefentry project= 'die-net' > <refentrytitle > dracut.cmdline</refentrytitle> <manvolnum > 7</manvolnum> </citerefentry> ,
2014-06-19 18:54:40 +04:00
<citerefentry > <refentrytitle > systemd-debug-generator</refentrytitle> <manvolnum > 8</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> ,
man: add a mapping for external manpages
It is annoying when we have dead links on fd.o.
Add project='man-pages|die-net|archlinux' to <citerefentry>-ies.
In generated html, add external links to
http://man7.org/linux/man-pages/man, http://linux.die.net/man/,
https://www.archlinux.org/.
By default, pages in sections 2 and 4 go to man7, since Michael
Kerrisk is the autorative source on kernel related stuff.
The rest of links goes to linux.die.net, because they have the
manpages.
Except for the pacman stuff, since it seems to be only available from
archlinux.org.
Poor gummiboot gets no link, because gummitboot(8) ain't to be found
on the net. According to common wisdom, that would mean that it does
not exist. But I have seen Kay using it, so I know it does, and
deserves to be found. Can somebody be nice and put it up somewhere?
2014-07-08 02:25:54 +04:00
<citerefentry project= 'die-net' > <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> ,
2014-06-19 18:54:40 +04:00
<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> ,
2014-08-27 00:17:45 +04:00
<citerefentry > <refentrytitle > systemd-rfkill@.service</refentrytitle> <manvolnum > 8</manvolnum> </citerefentry> ,
<citerefentry > <refentrytitle > systemd-hibernate-resume-generator</refentrytitle> <manvolnum > 8</manvolnum> </citerefentry>
2012-06-22 03:35:52 +04:00
</para>
</refsect1>
</refentry>
