<para>When listing units with <command>list-dependencies</command>, recursively show
dependencies of all dependent units (by default only dependencies of target units are
shown).</para>
+
+ <para>When used with <command>status</command>, show journal messages in full, even if they include
+ unprintable characters or are very long. By default, fields with unprintable characters are
+ abbreviated as "blob data". (Note that the pager may escape unprintable characters again.)</para>
</listitem>
</varlistentry>
<listitem>
<para>Just print what would be done. Currently supported by verbs
<command>halt</command>, <command>poweroff</command>, <command>reboot</command>,
- <command>kexec</command>, <command>suspend</command>,
- <command>hibernate</command>, <command>hybrid-sleep</command>,
+ <command>kexec</command>, <command>suspend</command>, <command>hibernate</command>,
+ <command>hybrid-sleep</command>, <command>suspend-then-hibernate</command>,
<command>default</command>, <command>rescue</command>,
<command>emergency</command>, and <command>exit</command>.</para>
</listitem>
<term><option>--runtime</option></term>
<listitem>
- <para>When used with <command>set-property</command>, make changes only
- temporarily, so that they are lost on the next reboot.</para>
-
- <para>Similarily, when used with <command>enable</command>, <command>mask</command>,
- <command>edit</command> and related commands, make temporary changes, which are lost on
- the next reboot. Changes are not made in subdirectories of <filename>/etc</filename>, but
- in <filename>/run</filename>. The immediate effect is identical, however since the latter
+ <para>When used with <command>enable</command>,
+ <command>disable</command>, <command>edit</command>,
+ (and related commands), make changes only temporarily, so
+ that they are lost on the next reboot. This will have the
+ effect that changes are not made in subdirectories of
+ <filename>/etc</filename> but in <filename>/run</filename>,
+ with identical immediate effects, however, since the latter
is lost on reboot, the changes are lost too.</para>
- <para>Note: this option cannot be used with <command>disable</command>,
- <command>unmask</command>, <command>preset</command>, or <command>preset-all</command>,
- because those operations sometimes need to remove symlinks under <filename>/etc</filename>
- to have the desired effect, which would cause a persistent change.</para>
+ <para>Similarly, when used with
+ <command>set-property</command>, make changes only
+ temporarily, so that they are lost on the next
+ reboot.</para>
</listitem>
</varlistentry>
<term><option>--lines=</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
+ <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, or 0 to disable journal output. Defaults to
10.</para>
</listitem>
</varlistentry>
terminating abnormally or timing out), it will automatically enter the <literal>failed</literal> state and
its exit code and status is recorded for introspection by the administrator until the service is
stopped/re-started or reset with this command.</para>
+
+ <para>In addition to resetting the <literal>failed</literal> state of a unit it also resets various other
+ per-unit properties: the start rate limit counter of all unit types is reset to zero, as is the restart
+ counter of service units. Thus, if a unit's start limit (as configured with
+ <varname>StartLimitIntervalSec=</varname>/<varname>StartLimitBurst=</varname>) is hit and the unit refuses
+ to be started again, use this command to make it startable again.</para>
</listitem>
</varlistentry>
<option>--after</option>, <option>--before</option>
may be used to change what types of dependencies
are shown.</para>
+
+ <para>Note that this command only lists units currently loaded into memory by the service manager. In
+ particular, this command is not suitable to get a comprehensive list at all reverse dependencies on a
+ specific unit, as it won't list the dependencies declared by units currently not loaded.</para>
</listitem>
</varlistentry>
</variablelist>
sleep operation is successfully enqueued. It will not wait for the sleep/wake-up cycle to complete.</para>
</listitem>
</varlistentry>
+
+ <varlistentry>
+ <term><command>suspend-then-hibernate</command></term>
+
+ <listitem>
+ <para>Suspend the system and hibernate it after the delay specified in <filename>systemd-sleep.conf</filename>.
+ This will trigger activation of the special target unit <filename>suspend-then-hibernate.target</filename>.
+ This command is asynchronous, and will return after the hybrid sleep operation is successfully enqueued.
+ It will not wait for the sleep/wake-up or hibernate/thaw cycle to complete.</para>
+ </listitem>
+ </varlistentry>
</variablelist>
</refsect2>
<refsect1>
<title>Exit status</title>
- <para>On success, 0 is returned, a non-zero failure
- code otherwise.</para>
+ <para>On success, 0 is returned, a non-zero failure code otherwise.</para>
+
+ <para><command>systemctl</command> uses the return codes defined by LSB, as defined in
+ <ulink url="http://refspecs.linuxbase.org/LSB_3.0.0/LSB-PDA/LSB-PDA/iniscrptact.html">LSB 3.0.0</ulink>.
+ </para>
+
+ <table>
+ <title>LSB return codes</title>
+
+ <tgroup cols='3'>
+ <thead>
+ <row>
+ <entry>Value</entry>
+ <entry>Description in LSB</entry>
+ <entry>Use in systemd</entry>
+ </row>
+ </thead>
+ <tbody>
+ <row>
+ <entry><constant>0</constant></entry>
+ <entry>"program is running or service is OK"</entry>
+ <entry>unit is active</entry>
+ </row>
+ <row>
+ <entry><constant>1</constant></entry>
+ <entry>"program is dead and <filename>/var/run</filename> pid file exists"</entry>
+ <entry>unit <emphasis>not</emphasis> failed (used by <command>is-failed</command>)</entry>
+ </row>
+ <row>
+ <entry><constant>2</constant></entry>
+ <entry>"program is dead and <filename>/var/lock</filename> lock file exists"</entry>
+ <entry>unused</entry>
+ </row>
+ <row>
+ <entry><constant>3</constant></entry>
+ <entry>"program is not running"</entry>
+ <entry>unit is not active</entry>
+ </row>
+ <row>
+ <entry><constant>4</constant></entry>
+ <entry>"program or service status is unknown"</entry>
+ <entry>no such unit</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+
+ <para>The mapping of LSB service states to systemd unit states is imperfect, so it is better to
+ not rely on those return values but to look for specific unit states and substates instead.
+ </para>
</refsect1>
<refsect1>
projects / thirdparty / systemd.git / blobdiff