<term><option>--type=</option></term>
<term><option>-t</option></term>
- <listitem><para>When listing units,
- limit display to certain unit
- types. If not specified units of all
- types will be shown. The argument
- should be a unit type name such as
- <option>service</option>,
- <option>socket</option> and
- similar.</para></listitem>
+ <listitem><para>The argument should
+ be a unit type name such as
+ <option>service</option> and
+ <option>socket</option>,
+ or a unit load state such as
+ <option>loaded</option> and
+ <option>masked</option>.
+ </para>
+
+ <para>If the argument is a unit type,
+ when listing units, limit display to
+ certain unit types. If not specified
+ units of all types will be shown.</para>
+
+ <para>If the argument is a unit load state,
+ when listing units, limit display to
+ certain unit types. If not specified
+ units of in all load states will be
+ shown.</para>
+ </listitem>
</varlistentry>
<varlistentry>
<varlistentry>
<term><option>--no-legend</option></term>
- <listitem><para>Do not print a legend, i.e.
+ <listitem><para>Do not print a legend, i.e.
the column headers and the footer with hints.
- </para></listitem>
- </varlistentry>
+ </para></listitem>
+ </varlistentry>
<varlistentry>
<term><option>--no-pager</option></term>
- <listitem><para>Do not pipe output into a
- pager.</para></listitem>
- </varlistentry>
+ <listitem><para>Do not pipe output into a
+ pager.</para></listitem>
+ </varlistentry>
<varlistentry>
<term><option>--system</option></term>
<term><option>-f</option></term>
<listitem><para>When used with
- <command>enable</command>, override any
+ <command>enable</command>, overwrite any
existing conflicting
symlinks.</para></listitem>
<term><option>-f</option></term>
<listitem><para>When used with
- <command>status</command> continously
+ <command>status</command> continuously
prints new journal entries as they are
appended to the
journal.</para></listitem>
looking for formatted human-readable
output.</para></listitem>
</varlistentry>
+ <varlistentry>
+ <term><command>help [NAME...|PID...]</command></term>
+ <listitem><para>Show manual pages for
+ one or more units, if available. If a
+ PID is passed the manual pages for the
+ unit the process of the PID belongs to
+ is shown.</para></listitem>
+ </varlistentry>
<varlistentry>
<term><command>reset-failed [NAME...]</command></term>
<varlistentry>
<term><command>enable [NAME...]</command></term>
- <listitem><para>Enable one or more
- unit files, as specified on the
+ <listitem><para>Enable one or
+ more unit files or unit file
+ instances, as specified on the
command line. This will create a
- number of symlinks as encoded in the
- <literal>[Install]</literal> sections
- of the unit files. After the symlinks
- have been created the systemd
- configuration is reloaded (in a way
- that is equivalent to
- <command>daemon-reload</command>) to
- ensure the changes are taken into
+ number of symlinks as encoded in
+ the <literal>[Install]</literal>
+ sections of the unit files. After
+ the symlinks have been created the
+ systemd configuration is reloaded
+ (in a way that is equivalent to
+ <command>daemon-reload</command>)
+ to ensure the changes are taken into
account immediately. Note that this
does not have the effect that any of
the units enabled are also started at
- the same time. If this is desired a
- separate <command>start</command>
- command must be invoked for the
- unit.</para>
+ the same time. If this is desired
+ a separate <command>start</command>
+ command must be invoked for the unit.
+ Also note that in case of instance
+ enablement, symlinks named same as
+ instances are created in install
+ location, however they all point to
+ the same template unit file.</para>
<para>This command will
print the actions executed. This
command does not implicitly stop the
units that is being disabled. If this
is desired an additional
- <command>stop</command>command should
+ <command>stop</command> command should
be executed afterwards.</para>
<para>This command will print the
<listitem><para>Reset one or more unit
files, as specified on the command
- line, to the defaults configured in a
- preset file. This has the same effect
- as <command>disable</command> or
+ line, to the defaults configured in
+ the preset policy files. This has the
+ same effect as
+ <command>disable</command> or
<command>enable</command>, depending
how the unit is listed in the preset
- files.</para>
+ files. For more information on preset
+ policy format see
+ <citerefentry><refentrytitle>systemd.preset</refentrytitle><manvolnum>5</manvolnum></citerefentry>. For
+ more information on the concept of
+ presets please consult the <ulink
+ url="http://freedesktop.org/wiki/Software/systemd/Preset">Preset</ulink>
+ document.</para>
</listitem>
</varlistentry>
mounted read-only, immediately
followed by the system halt. If
<option>--force</option> is specified
- twice the the operation is immediately
+ twice the operation is immediately
executed without terminating any
processes or unmounting any file
systems. This may result in data
unmounted or mounted read-only,
immediately followed by the powering
off. If <option>--force</option> is
- specified twice the the operation is
+ specified twice the operation is
immediately executed without
terminating any processes or
unmounting any file systems. This may
unmounted or mounted read-only,
immediately followed by the reboot. If
<option>--force</option> is specified
- twice the the operation is immediately
+ twice the operation is immediately
executed without terminating any
processes or unmounting any file
systems. This may result in data
<listitem><para>Hibernate the system.</para></listitem>
</varlistentry>
+ <varlistentry>
+ <term><command>switch-root [ROOT] [INIT]</command></term>
+
+ <listitem><para>Switches to a
+ different root directory and executes
+ a new system manager process below
+ it. This is intended for usage in
+ initial RAM disks ("initrd"), and will
+ transition from the initrd's system
+ manager process (a.k.a "init" process)
+ to the main system manager
+ process. Takes two arguments: the
+ directory to make the new root
+ directory, and the path to the new
+ system manager binary below it to
+ execute as PID 1. If the latter is
+ omitted or the empty string, a
+ systemd binary will automatically be
+ searched for and used as init. If the
+ system manager path is omitted or
+ equal the empty string the state of
+ the initrd's system manager process is
+ passed to the main system manager,
+ which allows later introspection of the
+ state of the services involved in the
+ initrd boot.</para></listitem>
+ </varlistentry>
</variablelist>
</refsect1>
<citerefentry><refentrytitle>loginctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd.special</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>wall</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+ <citerefentry><refentrytitle>wall</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd.preset</refentrytitle><manvolnum>5</manvolnum></citerefentry>
</para>
</refsect1>