1193 lines
62 KiB
XML
1193 lines
62 KiB
XML
<?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 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser 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. This also disables querying the
|
|
user for authentication for privileged
|
|
operations.</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>
|