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diff --git a/man/systemctl.xml b/man/systemctl.xml new file mode 100644 index 0000000000..167a72b58b --- /dev/null +++ b/man/systemctl.xml @@ -0,0 +1,1190 @@ +<?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 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 + (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. + + You should have received a copy of the GNU General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +--> + +<refentry id="systemctl"> + + <refentryinfo> + <title>systemctl</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>systemctl</refentrytitle> + <manvolnum>1</manvolnum> + </refmeta> + + <refnamediv> + <refname>systemctl</refname> + <refpurpose>Control the systemd system and service manager</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <cmdsynopsis> + <command>systemctl <arg choice="opt" rep="repeat">OPTIONS</arg> <arg choice="req">COMMAND</arg> <arg choice="opt" rep="repeat">NAME</arg></command> + </cmdsynopsis> + </refsynopsisdiv> + + <refsect1> + <title>Description</title> + + <para><command>systemctl</command> may be used to + introspect and control the state of the + <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry> + system and service manager.</para> + </refsect1> + + <refsect1> + <title>Options</title> + + <para>The following options are understood:</para> + + <variablelist> + <varlistentry> + <term><option>--help</option></term> + <term><option>-h</option></term> + + <listitem><para>Prints a short help + text and exits.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--version</option></term> + + <listitem><para>Prints a short version + string and exits.</para></listitem> + </varlistentry> + + <varlistentry> + <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> + </varlistentry> + + <varlistentry> + <term><option>--property=</option></term> + <term><option>-p</option></term> + + <listitem><para>When showing + unit/job/manager properties, limit + display to certain properties as + specified as argument. If not + specified all set properties are + shown. The argument should be a + property name, such as + <literal>MainPID</literal>. If + specified more than once all + properties with the specified names + are shown.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--all</option></term> + <term><option>-a</option></term> + + <listitem><para>When listing units, + show all units, regardless of their + state, including inactive units. When + showing unit/job/manager properties, + show all properties regardless whether + they are set or not.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--failed</option></term> + + <listitem><para>When listing units, + show only failed units. Do not confuse + with + <option>--fail</option>.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--full</option></term> + + <listitem><para>Do not ellipsize unit + names and truncate unit descriptions + in the output of + <command>list-units</command> and + <command>list-jobs</command>.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--fail</option></term> + + <listitem><para>If the requested + operation conflicts with a pending + unfinished job, fail the command. If + this is not specified the requested + operation will replace the pending job, + if necessary. Do not confuse + with + <option>--failed</option>.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--ignore-dependencies</option></term> + + <listitem><para>When enqueuing a new + job ignore all its dependencies and + execute it immediately. If passed no + required units of the unit passed will + be pulled in, and no ordering + dependencies will be honoured. This is + mostly a debugging and rescue tool for + the administrator and should not be + used by + applications.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--quiet</option></term> + <term><option>-q</option></term> + + <listitem><para>Suppress output to + STDOUT in + <command>snapshot</command>, + <command>is-active</command>, + <command>enable</command> and + <command>disable</command>.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--no-block</option></term> + + <listitem><para>Do not synchronously wait for + the requested operation to finish. If this is + not specified the job will be verified, + enqueued and <command>systemctl</command> will + wait until it is completed. By passing this + argument it is only verified and + enqueued.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--no-legend</option></term> + + <listitem><para>Do not print a legend, i.e. + the column headers and the footer with hints. + </para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--no-pager</option></term> + + <listitem><para>Do not pipe output into a + pager.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--system</option></term> + + <listitem><para>Talk to the systemd + system manager. (Default)</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--user</option></term> + + <listitem><para>Talk to the systemd + manager of the calling user.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--order</option></term> + <term><option>--require</option></term> + + <listitem><para>When used in + conjunction with the + <command>dot</command> command (see + below), selects which dependencies are + shown in the dependency graph. If + <option>--order</option> is passed + only dependencies of type + <varname>After=</varname> or + <varname>Before=</varname> are + shown. If <option>--require</option> + is passed only dependencies of type + <varname>Requires=</varname>, + <varname>RequiresOverridable=</varname>, + <varname>Requisite=</varname>, + <varname>RequisiteOverridable=</varname>, + <varname>Wants=</varname> and + <varname>Conflicts=</varname> are + shown. If neither is passed, shows + dependencies of all these + types.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--no-wall</option></term> + + <listitem><para>Don't send wall + message before + halt, power-off, reboot.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--global</option></term> + + <listitem><para>When used with + <command>enable</command> and + <command>disable</command>, operate on the + global user configuration + directory, thus enabling or disabling + a unit file globally for all future + logins of all users.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--no-reload</option></term> + + <listitem><para>When used with + <command>enable</command> and + <command>disable</command>, do not + implicitly reload daemon configuration + after executing the + changes.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--no-ask-password</option></term> + + <listitem><para>When used with + <command>start</command> and related + commands, disables asking for + passwords. Background services may + require input of a password or + passphrase string, for example to + unlock system hard disks or + cryptographic certificates. Unless + this option is specified and the + command is invoked from a terminal + <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> + </varlistentry> + + <varlistentry> + <term><option>--kill-who=</option></term> + + <listitem><para>When used with + <command>kill</command>, choose which + processes to kill. Must be one of + <option>main</option>, + <option>control</option> or + <option>all</option> to select whether + to kill only the main process of the + unit, the control process or all + processes of the unit. If omitted + defaults to + <option>all</option>.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--signal=</option></term> + <term><option>-s</option></term> + + <listitem><para>When used with + <command>kill</command>, choose which + signal to send to selected + processes. Must be one of the well + known signal specifiers such as + SIGTERM, SIGINT or SIGSTOP. If + omitted defaults to + <option>SIGTERM</option>.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--force</option></term> + <term><option>-f</option></term> + + <listitem><para>When used with + <command>enable</command>, override any + existing conflicting + symlinks.</para></listitem> + + <listitem><para>When used with + <command>halt</command>, + <command>poweroff</command>, + <command>reboot</command> or + <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. 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> + <term><option>--root=</option></term> + + <listitem><para>When used with + <command>enable</command>/<command>disable</command>/<command>is-enabled</command> (and + related commands), use alternative + root path when looking for unit + files.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>--runtime</option></term> + + <listitem><para>When used with + <command>enable</command>/<command>disable</command>/<command>is-enabled</command> (and related commands), make + changes only temporarily, so that they + are dropped 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></listitem> + </varlistentry> + + <varlistentry> + <term><option>-H</option></term> + <term><option>--host</option></term> + + <listitem><para>Execute operation + remotely. Specify a hostname, or + username and hostname separated by @, + to connect to. This will use SSH to + talk to the remote systemd + instance.</para></listitem> + </varlistentry> + + <varlistentry> + <term><option>-P</option></term> + <term><option>--privileged</option></term> + + <listitem><para>Acquire privileges via + 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> + + <variablelist> + <varlistentry> + <term><command>list-units</command></term> + + <listitem><para>List known units.</para></listitem> + </varlistentry> + <varlistentry> + <term><command>start [NAME...]</command></term> + + <listitem><para>Start (activate) one + or more units specified on the command + line.</para></listitem> + </varlistentry> + <varlistentry> + <term><command>stop [NAME...]</command></term> + + <listitem><para>Stop (deactivate) one + or more units specified on the command + line.</para></listitem> + </varlistentry> + <varlistentry> + <term><command>reload [NAME...]</command></term> + + <listitem><para>Asks all units listed + on the command line to reload their + configuration. Note that this will + reload the service-specific + configuration, not the unit + configuration file of systemd. If you + want systemd to reload the + configuration file of a unit use the + <command>daemon-reload</command> + command. In other words: for the + example case of Apache, this will + reload Apache's + <filename>httpd.conf</filename> in the + web server, not the + <filename>apache.service</filename> + systemd unit file. </para> + + <para>This command should not be + confused with the + <command>daemon-reload</command> or + <command>load</command> + commands.</para></listitem> + + </varlistentry> + <varlistentry> + <term><command>restart [NAME...]</command></term> + + <listitem><para>Restart one or more + units specified on the command + line. If the units are not running yet + they will be + started.</para></listitem> + </varlistentry> + <varlistentry> + <term><command>try-restart [NAME...]</command></term> + + <listitem><para>Restart one or more + units specified on the command + line if the units are running. Do + nothing if units are not running. + Note that for compatibility + with Red Hat init scripts + <command>condrestart</command> is + equivalent to this command.</para></listitem> + </varlistentry> + <varlistentry> + <term><command>reload-or-restart [NAME...]</command></term> + + <listitem><para>Reload one or more + units if they support it. If not, + restart them instead. If the units + are not running yet they will be + started.</para></listitem> + </varlistentry> + <varlistentry> + <term><command>reload-or-try-restart [NAME...]</command></term> + + <listitem><para>Reload one or more + units if they support it. If not, + restart them instead. Do nothing if + the units are not running. Note that + for compatibility with SysV init + scripts + <command>force-reload</command> is + equivalent to this + command.</para></listitem> + </varlistentry> + <varlistentry> + <term><command>isolate [NAME]</command></term> + + <listitem><para>Start the unit + specified on the command line and its + dependencies and stop all others.</para> + + <para>This is similar to changing the + runlevel in a traditional init system. The + <command>isolate</command> command will + immediately stop processes that are not + enabled in the new unit, possibly including + the graphical environment or terminal you + are currently using.</para> + + <para>Note that this works only on units + where <option>AllowIsolate=</option> is + enabled. See + <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry> + for details.</para></listitem> + </varlistentry> + <varlistentry> + <term><command>kill [NAME...]</command></term> + + <listitem><para>Send a signal to one + or more processes of the unit. Use + <option>--kill-who=</option> to select + which process to kill. Use + <option>--kill-mode=</option> to + select the kill mode and + <option>--signal=</option> to select + the signal to send.</para></listitem> + </varlistentry> + <varlistentry> + <term><command>is-active [NAME...]</command></term> + + <listitem><para>Check whether any of + the specified units are active + (i.e. running). Returns an exit code + 0 if at least one is active, non-zero + otherwise. Unless + <option>--quiet</option> is specified + this will also print the current unit + state to STDOUT.</para></listitem> + </varlistentry> + <varlistentry> + <term><command>status [NAME...|PID...]</command></term> + + <listitem><para>Show terse runtime + status information about one or more + 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> + + <listitem><para>Show properties of one + or more units, jobs or the manager + itself. If no argument is specified + properties of the manager will be + shown. If a unit name is specified + properties of the unit is shown, and + if a job id is specified properties of + the job is shown. By default, empty + properties are suppressed. Use + <option>--all</option> to show those + too. To select specific properties to + show use + <option>--property=</option>. This + command is intended to be used + whenever computer-parsable output is + required. Use + <command>status</command> if you are + looking for formatted human-readable + output.</para></listitem> + </varlistentry> + + <varlistentry> + <term><command>reset-failed [NAME...]</command></term> + + <listitem><para>Reset the + '<literal>failed</literal>' state of the + specified units, or if no unit name is + passed of all units. When a unit fails + in some way (i.e. process exiting with + non-zero error code, 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 restarted or + reset with this + 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> + + <listitem><para>Enable one or more + unit files, 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 + 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> + + <para>This command will + print the actions executed. This + output may be suppressed by passing + <option>--quiet</option>.</para> + + <para>Note that this operation creates + only the suggested symlinks for the + units. While this command is the + recommended way to manipulate the unit + configuration directory, the + administrator is free to make + additional changes manually, by + placing or removing symlinks in the + directory. This is particularly useful + to create configurations that deviate + from the suggested default + installation. In this case the + administrator must make sure to invoke + <command>daemon-reload</command> + manually as necessary, to ensure his + changes are taken into account.</para> + + <para>Enabling units should not be + confused with starting (activating) + units, as done by the + <command>start</command> + command. Enabling and starting units + is orthogonal: units may be enabled + without being started and started + without being enabled. Enabling simply + hooks the unit into various suggested + places (for example, so that the unit + is automatically started on boot or + when a particular kind of hardware is + plugged in). Starting actually spawns + the daemon process (in case of service + units), or binds the socket (in case + of socket units), and so + on.</para> + + <para>Depending on whether + <option>--system</option>, + <option>--user</option> or + <option>--global</option> is specified + this enables the unit for the system, + for the calling user only + or for all future logins of all + users. Note that in the latter case no + systemd daemon configuration is + reloaded.</para> + </listitem> + </varlistentry> + + <varlistentry> + <term><command>disable [NAME...]</command></term> + + <listitem><para>Disables one or more + units. This removes all symlinks to + the specified unit files from the unit + configuration directory, and hence + undoes the changes made by + <command>enable</command>. Note + however that this removes + all symlinks to the unit files + (i.e. including manual additions), not + just those actually created by + <command>enable</command>. This call + implicitly reloads the systemd daemon + configuration after completing the + disabling of the units. Note that this + command does not implicitly stop the + units that is being disabled. If this + is desired an additional + <command>stop</command>command should + be executed afterwards.</para> + + <para>This command will print the + actions executed. This output may be + suppressed by passing + <option>--quiet</option>.</para> + </listitem> + + <para>This command honors + <option>--system</option>, + <option>--user</option>, + <option>--global</option> in a similar + way as + <command>enable</command>.</para> + </varlistentry> + + <varlistentry> + <term><command>is-enabled [NAME...]</command></term> + + <listitem><para>Checks whether any of + the specified unit files is enabled + (as with + <command>enable</command>). Returns an + exit code of 0 if at least one is + enabled, non-zero otherwise. Prints + the current enable status. To suppress + this output use + <option>--quiet</option>.</para></listitem> + </varlistentry> + + <varlistentry> + <term><command>reenable [NAME...]</command></term> + + <listitem><para>Reenable one or more + unit files, as specified on the + command line. This is a combination of + <command>disable</command> and + <command>enable</command> and is + useful to reset the symlinks a unit is + enabled with to the defaults + configured in the + <literal>[Install]</literal> section + of the unit file.</para> + </listitem> + </varlistentry> + + <varlistentry> + <term><command>preset [NAME...]</command></term> + + <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 + <command>enable</command>, depending + how the unit is listed in the preset + files.</para> + </listitem> + </varlistentry> + + <varlistentry> + <term><command>mask [NAME...]</command></term> + + <listitem><para>Mask one or more unit + files, as specified on the command + line. This will link these units to + <filename>/dev/null</filename>, making + it impossible to start them. This is a stronger version + of <command>disable</command>, since + it prohibits all kinds of activation + of the unit, including manual + activation. Use this option with + care.</para> + </listitem> + </varlistentry> + + <varlistentry> + <term><command>unmask [NAME...]</command></term> + + <listitem><para>Unmask one or more + unit files, as specified on the + command line. This will undo the + effect of + <command>mask</command>.</para> + </listitem> + </varlistentry> + + <varlistentry> + <term><command>link [NAME...]</command></term> + + <listitem><para>Link a unit file that + is not in the unit file search paths + into the unit file search path. This + requires an absolute path to a unit + file. The effect of this can be undone + with <command>disable</command>. The + effect of this command is that a unit + file is available for + <command>start</command> and other + commands although it isn't installed + directly in the unit search + path.</para> + </listitem> + </varlistentry> + + <varlistentry> + <term><command>load [NAME...]</command></term> + + <listitem><para>Load one or more units + specified on the command line. This + will simply load their configuration + from disk, but not start them. To + start them you need to use the + <command>start</command> command which + will implicitly load a unit that has + not been loaded yet. Note that systemd + garbage collects loaded units that are + not active or referenced by an active + unit. This means that units loaded + this way will usually not stay loaded + for long. Also note that this command + cannot be used to reload unit + configuration. Use the + <command>daemon-reload</command> + command for that. All in all, this + command is of little use except for + debugging.</para> + <para>This command should not be + confused with the + <command>daemon-reload</command> or + <command>reload</command> + commands.</para></listitem> + </varlistentry> + <varlistentry> + <term><command>list-jobs</command></term> + + <listitem><para>List jobs that are in progress.</para></listitem> + </varlistentry> + <varlistentry> + <term><command>cancel [JOB...]</command></term> + + <listitem><para>Cancel one or more + jobs specified on the command line by + their numeric job + IDs. If no job id is specified, cancel all pending jobs.</para></listitem> + </varlistentry> + <varlistentry> + <term><command>dump</command></term> + + <listitem><para>Dump server + status. This will output a (usually + very long) human readable manager + status dump. Its format is subject to + change without notice and should not + be parsed by + applications.</para></listitem> + </varlistentry> + <varlistentry> + <term><command>dot</command></term> + + <listitem><para>Generate textual + dependency graph description in dot + format for further processing with the + GraphViz + <citerefentry><refentrytitle>dot</refentrytitle><manvolnum>1</manvolnum></citerefentry> + tool. Use a command line like + <command>systemctl dot | dot -Tsvg > + systemd.svg</command> to generate a + graphical dependency tree. Unless + <option>--order</option> or + <option>--require</option> is passed + the generated graph will show both + ordering and requirement + dependencies.</para></listitem> + </varlistentry> + <varlistentry> + <term><command>snapshot [NAME]</command></term> + + <listitem><para>Create a snapshot. If + a snapshot name is specified, the new + snapshot will be named after it. If + none is specified an automatic + snapshot name is generated. In either + case, the snapshot name used is + printed to STDOUT, unless + <option>--quiet</option> is + specified.</para> + + <para>A snapshot refers to a saved + state of the systemd manager. It is + implemented itself as a unit that is + generated dynamically with this + command and has dependencies on all + units active at the time. At a later + time the user may return to this state + by using the + <command>isolate</command> command on + the snapshot unit.</para></listitem> + + <para>Snapshots are only useful for + saving and restoring which units are + running or are stopped, they do not + save/restore any other + state. Snapshots are dynamic and lost + on reboot.</para> + </varlistentry> + <varlistentry> + <term><command>delete [NAME...]</command></term> + + <listitem><para>Remove a snapshot + previously created with + <command>snapshot</command>.</para></listitem> + </varlistentry> + <varlistentry> + <term><command>daemon-reload</command></term> + + <listitem><para>Reload systemd manager + configuration. This will reload all + unit files and recreate the entire + dependency tree. While the daemon is + reloaded, all sockets systemd listens + on on behalf of user configuration will + stay accessible.</para> <para>This + command should not be confused with + the <command>load</command> or + <command>reload</command> + commands.</para></listitem> + </varlistentry> + <varlistentry> + <term><command>daemon-reexec</command></term> + + <listitem><para>Reexecute the systemd + manager. This will serialize the + manager state, reexecute the process + and deserialize the state again. This + command is of little use except for + debugging and package + upgrades. Sometimes it might be + helpful as a heavy-weight + <command>daemon-reload</command>. While + the daemon is reexecuted all sockets + systemd listens on on behalf of user + configuration will stay + accessible.</para></listitem> + </varlistentry> + <varlistentry> + <term><command>show-environment</command></term> + + <listitem><para>Dump the systemd + manager environment block. The + environment block will be dumped in + straight-forward form suitable for + sourcing into a shell script. This + environment block will be passed to + all processes the manager + spawns.</para></listitem> + </varlistentry> + <varlistentry> + <term><command>set-environment [NAME=VALUE...]</command></term> + + <listitem><para>Set one or more + systemd manager environment variables, + as specified on the command + line.</para></listitem> + </varlistentry> + <varlistentry> + <term><command>unset-environment [NAME...]</command></term> + + <listitem><para>Unset one or more + systemd manager environment + variables. If only a variable name is + specified it will be removed + regardless of its value. If a variable + and a value are specified the variable + is only removed if it has the + specified value.</para></listitem> + </varlistentry> + <varlistentry> + <term><command>default</command></term> + + <listitem><para>Enter default + mode. This is mostly equivalent to + <command>start + default.target</command>.</para></listitem> + </varlistentry> + <varlistentry> + <term><command>rescue</command></term> + + <listitem><para>Enter rescue + mode. This is mostly equivalent to + <command>isolate + rescue.target</command> but also + prints a wall message to all + users.</para></listitem> + </varlistentry> + <varlistentry> + <term><command>emergency</command></term> + + <listitem><para>Enter emergency + mode. This is mostly equivalent to + <command>isolate + emergency.target</command> but also + prints a wall message to all + users.</para></listitem> + </varlistentry> + <varlistentry> + <term><command>halt</command></term> + + <listitem><para>Shut down and halt 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 + mounted read-only, immediately + 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> + + <listitem><para>Shut down and + power-off the system. This is mostly + equivalent to <command>start + poweroff.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 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 + reboot.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 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> + + <listitem><para>Shut down and reboot + the system via kexec. This is mostly + equivalent to <command>start + kexec.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 + mounted read-only, immediately + followed by the + reboot.</para></listitem> + </varlistentry> + <varlistentry> + <term><command>exit</command></term> + + <listitem><para>Ask the systemd + manager to quit. This is only + supported for user service managers + (i.e. in conjunction with the + <option>--user</option> option) and + will fail otherwise.</para></listitem> + </varlistentry> + </variablelist> + + </refsect1> + + <refsect1> + <title>Exit status</title> + + <para>On success 0 is returned, a non-zero failure + code otherwise.</para> + </refsect1> + + <refsect1> + <title>Environment</title> + + <variablelist> + <varlistentry> + <term><varname>$SYSTEMD_PAGER</varname></term> + <listitem><para>Pager to use when + <option>--no-pager</option> is not given; + overrides <varname>$PAGER</varname>. Setting + this to an empty string or the value + <literal>cat</literal> is equivalent to passing + <option>--no-pager</option>.</para></listitem> + </varlistentry> + </variablelist> + </refsect1> + + <refsect1> + <title>See Also</title> + <para> + <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, + <citerefentry><refentrytitle>systemadm</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> + </para> + </refsect1> + +</refentry> |