Copyright 2010 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ 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
- General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU General Public License
+ You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
-->
<command>systemctl</command> will
query the user on the terminal for the
necessary secrets. Use this option to
- switch this behavior off. In this
- case the password must be supplied by
- some other means (for example
- graphical password agents) or the
- service might fail.</para></listitem>
+ switch this behavior off. In this case
+ the password must be supplied by some
+ other means (for example graphical
+ password agents) or the service might
+ fail. This also disables querying the
+ user for authentication for privileged
+ operations.</para></listitem>
</varlistentry>
<varlistentry>
<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>
<command>halt</command>,
<command>poweroff</command>,
<command>reboot</command> or
- <command>kexec</command> execute
+ <command>kexec</command> execute the
selected operation without shutting
down all units. However, all processes
will be killed forcibly and all file
systems are unmounted or remounted
read-only. This is hence a drastic but
relatively safe option to request an
- immediate reboot.</para></listitem>
+ immediate reboot. If
+ <option>--force</option> is specified
+ twice for these operations, they will
+ be executed immediately without
+ terminating any processes or umounting
+ any file systems. Warning: specifying
+ <option>--force</option> twice with
+ any of these operations might result
+ in data loss.</para></listitem>
</varlistentry>
<varlistentry>
PolicyKit before executing the
operation.</para></listitem>
</varlistentry>
+
+ <varlistentry>
+ <term><option>--lines=</option></term>
+ <term><option>-n</option></term>
+
+ <listitem><para>When used with
+ <command>status</command> controls the
+ number of journal lines to show,
+ counting from the most recent
+ ones. Takes a positive integer
+ argument. Defaults to
+ 10.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--follow</option></term>
+ <term><option>-f</option></term>
+
+ <listitem><para>When used with
+ <command>status</command> continously
+ prints new journal entries as they are
+ appended to the
+ journal.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--output=</option></term>
+ <term><option>-o</option></term>
+
+ <listitem><para>When used with
+ <command>status</command> controls the
+ formatting of the journal entries that
+ are shown. For the available choices
+ see
+ <citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>. Defaults
+ to
+ <literal>short</literal>.</para></listitem>
+ </varlistentry>
+
</variablelist>
<para>The following commands are understood:</para>
<listitem><para>Show terse runtime
status information about one or more
- units. This function is intended to
- generate human-readable output. If you
- are looking for computer-parsable
- output, use <command>show</command>
- instead. If a PID is passed
- information about the unit the process
- of the PID belongs to is
- shown.</para></listitem>
+ units, followed by its most recent log
+ data from the journal. This function
+ is intended to generate human-readable
+ output. If you are looking for
+ computer-parsable output, use
+ <command>show</command> instead. If a
+ PID is passed information about the
+ unit the process of the PID belongs to
+ is shown.</para></listitem>
</varlistentry>
<varlistentry>
<term><command>show [NAME...|JOB...]</command></term>
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>
command.</para></listitem>
</varlistentry>
+ <varlistentry>
+ <term><command>list-unit-files</command></term>
+
+ <listitem><para>List installed unit files.
+ </para></listitem>
+ </varlistentry>
+
<varlistentry>
<term><command>enable [NAME...]</command></term>
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
system. This is mostly equivalent to
<command>start halt.target</command>
but also prints a wall message to all
- users. If
- combined with <option>--force</option>
- shutdown of all running services is
- skipped, however all processes are killed
- and all file systems are unmounted or
+ users. If combined with
+ <option>--force</option> shutdown of
+ all running services is skipped,
+ however all processes are killed and
+ all file systems are unmounted or
mounted read-only, immediately
- followed by the
- system halt.</para></listitem>
+ followed by the system halt. If
+ <option>--force</option> is specified
+ twice the the operation is immediately
+ executed without terminating any
+ processes or unmounting any file
+ systems. This may result in data
+ loss.</para></listitem>
</varlistentry>
<varlistentry>
<term><command>poweroff</command></term>
power-off the system. This is mostly
equivalent to <command>start
poweroff.target</command> but also
- prints a wall message to all
- users. If
+ prints a wall message to all users. If
combined with <option>--force</option>
shutdown of all running services is
- skipped, however all processes are killed
- and all file systems are unmounted or
- mounted read-only, immediately
- followed by the
- powering off.</para></listitem>
+ skipped, however all processes are
+ killed and all file systems are
+ unmounted or mounted read-only,
+ immediately followed by the powering
+ off. If <option>--force</option> is
+ specified twice the the operation is
+ immediately executed without
+ terminating any processes or
+ unmounting any file systems. This may
+ result in data loss.</para></listitem>
</varlistentry>
<varlistentry>
<term><command>reboot</command></term>
- <listitem><para>Shut down and
- reboot the system. This is mostly
- equivalent to <command>start
+ <listitem><para>Shut down and reboot
+ the system. This is mostly equivalent
+ to <command>start
reboot.target</command> but also
- prints a wall message to all
- users. If
+ prints a wall message to all users. If
combined with <option>--force</option>
shutdown of all running services is
- skipped, however all processes are killed
- and all file systems are unmounted or
- mounted read-only, immediately
- followed by the
- reboot.</para></listitem>
+ skipped, however all processes are
+ killed and all file systems are
+ unmounted or mounted read-only,
+ immediately followed by the reboot. If
+ <option>--force</option> is specified
+ twice the the operation is immediately
+ executed without terminating any
+ processes or unmounting any file
+ systems. This may result in data
+ loss.</para></listitem>
</varlistentry>
<varlistentry>
<term><command>kexec</command></term>
<option>--user</option> option) and
will fail otherwise.</para></listitem>
</varlistentry>
+ <varlistentry>
+ <term><command>suspend</command></term>
+
+ <listitem><para>Suspend the system.</para></listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><command>hibernate</command></term>
+
+ <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
+ ommitted or the empty string, a
+ systemd binary will automatically be
+ searched for and used as init. If the
+ system manager path is ommitted 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>
<para>
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemadm</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>systemd-loginctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <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>
~ianmdlvl / elogind.git / blobdiff