projects / thirdparty / systemd.git / blame
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| 7874bcd6 LP |
1 | <?xml version='1.0'?> <!--*-nxml-*--> |
| 2 | <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" | |
| 3 | "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> | |
| 4 | ||
| 5 | <!-- | |
| 6 | This file is part of systemd. | |
| 7 | ||
| 8 | Copyright 2010 Lennart Poettering | |
| 9 | ||
| 10 | systemd is free software; you can redistribute it and/or modify it | |
| 11 | under the terms of the GNU General Public License as published by | |
| 12 | the Free Software Foundation; either version 2 of the License, or | |
| 13 | (at your option) any later version. | |
| 14 | ||
| 15 | systemd is distributed in the hope that it will be useful, but | |
| 16 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 18 | General Public License for more details. | |
| 19 | ||
| 20 | You should have received a copy of the GNU General Public License | |
| 21 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
| 22 | --> | |
| 23 | ||
| ee5762e3 | 24 | <refentry id="systemctl"> |
| 7874bcd6 LP |
25 | |
| 26 | <refentryinfo> | |
| 27 | <title>systemctl</title> | |
| 28 | <productname>systemd</productname> | |
| 29 | ||
| 30 | <authorgroup> | |
| 31 | <author> | |
| 32 | <contrib>Developer</contrib> | |
| 33 | <firstname>Lennart</firstname> | |
| 34 | <surname>Poettering</surname> | |
| 35 | <email>lennart@poettering.net</email> | |
| 36 | </author> | |
| 37 | </authorgroup> | |
| 38 | </refentryinfo> | |
| 39 | ||
| 40 | <refmeta> | |
| 41 | <refentrytitle>systemctl</refentrytitle> | |
| 42 | <manvolnum>1</manvolnum> | |
| 43 | </refmeta> | |
| 44 | ||
| 45 | <refnamediv> | |
| 46 | <refname>systemctl</refname> | |
| 47 | <refpurpose>Control the systemd system and session manager</refpurpose> | |
| 48 | </refnamediv> | |
| 49 | ||
| 50 | <refsynopsisdiv> | |
| 51 | <cmdsynopsis> | |
| 52 | <command>systemctl <arg choice="opt" rep="repeat">OPTIONS</arg> <arg choice="req">COMMAND</arg> <arg choice="opt" rep="repeat">NAME</arg></command> | |
| 53 | </cmdsynopsis> | |
| 54 | </refsynopsisdiv> | |
| 55 | ||
| 56 | <refsect1> | |
| 57 | <title>Description</title> | |
| 58 | ||
| 59 | <para><command>systemctl</command> may be used to | |
| 60 | introspect and control the state of the | |
| 61 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry> | |
| 62 | system and session manager.</para> | |
| 63 | </refsect1> | |
| 64 | ||
| 65 | <refsect1> | |
| 66 | <title>Options</title> | |
| 67 | ||
| 68 | <para>The following options are understood:</para> | |
| 69 | ||
| 70 | <variablelist> | |
| 71 | <varlistentry> | |
| 72 | <term><option>--help</option></term> | |
| 7594fb25 | 73 | <term><option>-h</option></term> |
| 7874bcd6 LP |
74 | |
| 75 | <listitem><para>Prints a short help | |
| 76 | text and exits.</para></listitem> | |
| 77 | </varlistentry> | |
| 78 | ||
| 79 | <varlistentry> | |
| 80 | <term><option>--type=</option></term> | |
| 7594fb25 | 81 | <term><option>-t</option></term> |
| 7874bcd6 LP |
82 | |
| 83 | <listitem><para>When listing units, | |
| 84 | limit display to certain unit | |
| 85 | types. If not specified units of all | |
| 86 | types will be shown. The argument | |
| 87 | should be a unit type name such as | |
| 88 | <option>service</option>, | |
| 89 | <option>socket</option> and | |
| 90 | similar.</para></listitem> | |
| 91 | </varlistentry> | |
| 92 | ||
| 393a2f9b LP |
93 | <varlistentry> |
| 94 | <term><option>--property=</option></term> | |
| 95 | <term><option>-p</option></term> | |
| 96 | ||
| 97 | <listitem><para>When showing | |
| 98 | unit/job/manager information, limit | |
| ee5762e3 LP |
99 | display to certain properties as |
| 100 | specified as argument. If not | |
| 101 | specified all set properties are | |
| 393a2f9b LP |
102 | shown. The argument should be a |
| 103 | property name, such as | |
| ea4a240d LP |
104 | <literal>MainPID</literal>. If |
| 105 | specified more than once all | |
| 106 | properties with the specified names | |
| 107 | are shown.</para></listitem> | |
| 393a2f9b LP |
108 | </varlistentry> |
| 109 | ||
| 7874bcd6 LP |
110 | <varlistentry> |
| 111 | <term><option>--all</option></term> | |
| 7594fb25 | 112 | <term><option>-a</option></term> |
| 7874bcd6 LP |
113 | |
| 114 | <listitem><para>When listing units, | |
| 115 | show all units, regardless of their | |
| 393a2f9b LP |
116 | state, including inactive units. When |
| 117 | showing unit/job/manager information, | |
| 118 | show all properties regardless whether | |
| 119 | they are set or not.</para></listitem> | |
| 7874bcd6 LP |
120 | </varlistentry> |
| 121 | ||
| 8fe914ec LP |
122 | <varlistentry> |
| 123 | <term><option>--full</option></term> | |
| 124 | ||
| 125 | <listitem><para>Do not ellipsize unit | |
| 126 | names in the output of | |
| 127 | <command>list-units</command> and | |
| 128 | <command>list-jobs</command>.</para></listitem> | |
| 129 | </varlistentry> | |
| 130 | ||
| 7874bcd6 | 131 | <varlistentry> |
| 90d473a1 | 132 | <term><option>--fail</option></term> |
| 7874bcd6 LP |
133 | |
| 134 | <listitem><para>If the requested | |
| ee5762e3 LP |
135 | operation conflicts with a pending |
| 136 | unfinished job, fail the command. If | |
| 137 | this is not specified the requested | |
| 138 | operation will replace the pending job, | |
| 139 | if necessary.</para></listitem> | |
| 140 | </varlistentry> | |
| 141 | ||
| 142 | <varlistentry> | |
| 143 | <term><option>--quiet</option></term> | |
| 144 | <term><option>-q</option></term> | |
| 145 | ||
| 146 | <listitem><para>Suppress output to | |
| 147 | STDOUT in | |
| 148 | <command>snapshot</command>, | |
| 149 | <command>check</command>, | |
| 150 | <command>enable</command> and | |
| 151 | <command>disable</command>.</para></listitem> | |
| 152 | </varlistentry> | |
| 153 | ||
| 154 | <varlistentry> | |
| 155 | <term><option>--no-block</option></term> | |
| 156 | ||
| 157 | <listitem><para>Do not synchronously wait for | |
| 158 | the requested operation to finish. If this is | |
| 159 | not specified the job will be verified, | |
| 160 | enqueued and <command>systemctl</command> will | |
| 161 | wait until it is completed. By passing this | |
| 162 | argument it is only verified and | |
| 163 | enqueued.</para></listitem> </varlistentry> | |
| 164 | ||
| 165 | <varlistentry> | |
| 166 | <term><option>--system</option></term> | |
| 167 | ||
| 168 | <listitem><para>Talk to the systemd | |
| 169 | system manager. (Default)</para></listitem> | |
| 170 | </varlistentry> | |
| 171 | ||
| 172 | <varlistentry> | |
| 173 | <term><option>--session</option></term> | |
| 174 | ||
| 175 | <listitem><para>Talk to the systemd | |
| 176 | session manager of the calling user.</para></listitem> | |
| 7874bcd6 LP |
177 | </varlistentry> |
| 178 | ||
| 4445a875 LP |
179 | <varlistentry> |
| 180 | <term><option>--order</option></term> | |
| 181 | <term><option>--require</option></term> | |
| 182 | ||
| 183 | <listitem><para>When used in | |
| 184 | conjunction with the | |
| 185 | <command>dot</command> command (see | |
| 186 | below), selects which dependencies are | |
| 187 | shown in the dependency graph. If | |
| 188 | <option>--order</option> is passed | |
| 189 | only dependencies of type | |
| 190 | <varname>After=</varname> or | |
| 191 | <varname>Before=</varname> are | |
| 192 | shown. If <option>--require</option> | |
| 193 | is passed only dependencies of type | |
| 194 | <varname>Requires=</varname>, | |
| 195 | <varname>RequiresOverridable=</varname>, | |
| 196 | <varname>Requisite=</varname>, | |
| 197 | <varname>RequisiteOverridable=</varname>, | |
| 198 | <varname>Wants=</varname> and | |
| 199 | <varname>Conflicts=</varname> are | |
| 200 | shown. If neither is passed, shows | |
| 201 | dependencies of all these | |
| 202 | types.</para></listitem> | |
| 203 | </varlistentry> | |
| 204 | ||
| 7874bcd6 | 205 | <varlistentry> |
| ee5762e3 | 206 | <term><option>--no-wall</option></term> |
| 7874bcd6 | 207 | |
| ee5762e3 LP |
208 | <listitem><para>Don't send wall |
| 209 | message before | |
| 210 | halt, power-off, reboot.</para></listitem> | |
| 7874bcd6 LP |
211 | </varlistentry> |
| 212 | ||
| 213 | <varlistentry> | |
| ee5762e3 LP |
214 | <term><option>--global</option></term> |
| 215 | ||
| 216 | <listitem><para>When used with | |
| 217 | <command>enable</command> and | |
| 218 | <command>disable</command>, operate on the | |
| 219 | global session configuŕation | |
| 220 | directory, thus enabling or disabling | |
| 221 | a unit file globally for all future | |
| 222 | sessions of all users.</para></listitem> | |
| 7874bcd6 LP |
223 | </varlistentry> |
| 224 | ||
| 225 | <varlistentry> | |
| ee5762e3 LP |
226 | <term><option>--no-reload</option></term> |
| 227 | ||
| 228 | <listitem><para>When used with | |
| 229 | <command>enable</command> and | |
| 230 | <command>disable</command>, do not | |
| 231 | implicitly reload daemon configuration | |
| 232 | after executing the | |
| 233 | changes.</para></listitem> | |
| 234 | </varlistentry> | |
| 7594fb25 LP |
235 | |
| 236 | <varlistentry> | |
| ee5762e3 | 237 | <term><option>--force</option></term> |
| 7874bcd6 | 238 | |
| ee5762e3 LP |
239 | <listitem><para>When used with |
| 240 | <command>enable</command>, override any | |
| 241 | existing conflicting | |
| 242 | symlinks.</para></listitem> | |
| 7874bcd6 LP |
243 | </varlistentry> |
| 244 | ||
| 245 | <varlistentry> | |
| ee5762e3 LP |
246 | <term><option>--defaults</option></term> |
| 247 | ||
| 248 | <listitem><para>When used with | |
| 249 | <command>disable</command>, ensures | |
| 250 | that only the symlinks created by | |
| 251 | <command>enable</command> are removed, | |
| 252 | not all symlinks pointing to the unit | |
| 253 | file that shall be | |
| 254 | disabled.</para></listitem> | |
| 7874bcd6 LP |
255 | </varlistentry> |
| 256 | </variablelist> | |
| 257 | ||
| 258 | <para>The following commands are understood:</para> | |
| 259 | ||
| 260 | <variablelist> | |
| 261 | <varlistentry> | |
| 262 | <term><command>list-units</command></term> | |
| 263 | ||
| 264 | <listitem><para>List known units.</para></listitem> | |
| 265 | </varlistentry> | |
| 7874bcd6 LP |
266 | <varlistentry> |
| 267 | <term><command>start [NAME...]</command></term> | |
| 268 | ||
| ee5762e3 LP |
269 | <listitem><para>Start (activate) one |
| 270 | or more units specified on the command | |
| 7874bcd6 LP |
271 | line.</para></listitem> |
| 272 | </varlistentry> | |
| 273 | <varlistentry> | |
| 274 | <term><command>stop [NAME...]</command></term> | |
| 275 | ||
| ee5762e3 LP |
276 | <listitem><para>Stop (deactivate) one |
| 277 | or more units specified on the command | |
| 7874bcd6 LP |
278 | line.</para></listitem> |
| 279 | </varlistentry> | |
| 7874bcd6 LP |
280 | <varlistentry> |
| 281 | <term><command>reload [NAME...]</command></term> | |
| 282 | ||
| ee5762e3 LP |
283 | <listitem><para>Asks all units listed |
| 284 | on the command line to reload their | |
| 7874bcd6 | 285 | configuration. Note that this will |
| ee5762e3 LP |
286 | reload the service-specific |
| 287 | configuration, not the unit | |
| 288 | configuration file of systemd. If you | |
| 289 | want systemd to reload the | |
| 290 | configuration file of a unit use the | |
| 7874bcd6 LP |
291 | <command>daemon-reload</command> |
| 292 | command. In other words: for the | |
| 293 | example case of Apache, this will | |
| 294 | reload Apache's | |
| 295 | <filename>httpd.conf</filename> in the | |
| 296 | web server, not the | |
| 297 | <filename>apache.service</filename> | |
| ee5762e3 LP |
298 | systemd unit file. </para> |
| 299 | ||
| 300 | <para>This command should not be | |
| 301 | confused with the | |
| 302 | <command>daemon-reload</command> or | |
| 303 | <command>load</command> | |
| 7874bcd6 LP |
304 | commands.</para></listitem> |
| 305 | ||
| 306 | </varlistentry> | |
| 307 | <varlistentry> | |
| 6f28c033 LP |
308 | <term><command>restart [NAME...]</command></term> |
| 309 | ||
| 310 | <listitem><para>Restart one or more | |
| 311 | units specified on the command | |
| 312 | line. If the units are not running yet | |
| 313 | they will be | |
| 314 | started.</para></listitem> | |
| 315 | </varlistentry> | |
| 316 | <varlistentry> | |
| 317 | <term><command>try-restart [NAME...]</command></term> | |
| 318 | ||
| 319 | <listitem><para>Restart one or more | |
| 320 | units specified on the command | |
| 321 | line. If the units are not running yet | |
| 322 | the operation will | |
| 323 | fail.</para></listitem> | |
| 324 | </varlistentry> | |
| 325 | <varlistentry> | |
| 326 | <term><command>reload-or-restart [NAME...]</command></term> | |
| 327 | <term><command>reload-or-try-restart [NAME...]</command></term> | |
| 328 | ||
| 329 | <listitem><para>Reload one or more | |
| ee5762e3 LP |
330 | units if they support it. If not, |
| 331 | restart them instead. Note that for | |
| 332 | compatibility with SysV and Red Hat | |
| 333 | init scripts | |
| 334 | <command>force-reload</command> and | |
| 335 | <command>condrestart</command> may be | |
| 336 | used as equivalent commands to | |
| 337 | <command>reload-or-try-restart</command>.</para></listitem> | |
| 6f28c033 LP |
338 | </varlistentry> |
| 339 | <varlistentry> | |
| 7874bcd6 LP |
340 | <term><command>isolate [NAME]</command></term> |
| 341 | ||
| 342 | <listitem><para>Start the unit | |
| 343 | specified on the command line and its | |
| 2528a7a6 LP |
344 | dependencies and stop all others. Note |
| 345 | that this works only on units where | |
| 346 | <option>AllowIsolate=</option> is | |
| 347 | enabled. See | |
| 348 | <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry> | |
| 349 | for details.</para></listitem> | |
| 7874bcd6 | 350 | </varlistentry> |
| 7594fb25 | 351 | <varlistentry> |
| ee5762e3 | 352 | <term><command>is-active [NAME...]</command></term> |
| 7594fb25 LP |
353 | |
| 354 | <listitem><para>Check whether any of | |
| 355 | the specified units is active | |
| ee5762e3 LP |
356 | (i.e. running). Returns an exit code |
| 357 | 0 if at least one is active, non-zero | |
| 7594fb25 LP |
358 | otherwise. Unless |
| 359 | <option>--quiet</option> is specified | |
| 360 | this will also print the current unit | |
| 361 | state to STDOUT.</para></listitem> | |
| 362 | </varlistentry> | |
| 61cbdc4b | 363 | <varlistentry> |
| 75676b72 | 364 | <term><command>status [NAME...|PID...]</command></term> |
| 61cbdc4b | 365 | |
| ee5762e3 LP |
366 | <listitem><para>Show terse runtime |
| 367 | status information about one or more | |
| 368 | units. This function is intended to | |
| 369 | generate human-readable output. If you | |
| 370 | are looking for computer-parsable | |
| 371 | output, use <command>show</command> | |
| 75676b72 LP |
372 | instead. If a PID is passed |
| 373 | information about the unit the process | |
| 374 | of the PID belongs to is | |
| 375 | shown.</para></listitem> | |
| 61cbdc4b | 376 | </varlistentry> |
| 393a2f9b LP |
377 | <varlistentry> |
| 378 | <term><command>show [NAME...|JOB...]</command></term> | |
| 379 | ||
| ee5762e3 LP |
380 | <listitem><para>Show properties of one |
| 381 | or more units, jobs or the manager | |
| 393a2f9b | 382 | itself. If no argument is specified |
| 61cbdc4b | 383 | properties of the manager will be |
| 393a2f9b | 384 | shown. If a unit name is specified |
| ee5762e3 LP |
385 | properties of the unit is shown, and |
| 386 | if a job id is specified properties of | |
| 387 | the job is shown. By default, empty | |
| 388 | properties are suppressed. Use | |
| 389 | <option>--all</option> to show those | |
| 390 | too. To select specific properties to | |
| 391 | show use | |
| 392 | <option>--property=</option>. This | |
| 393 | command is intended to be used | |
| 394 | whenever computer-parsable output is | |
| 395 | required. Use | |
| 396 | <command>status</command> if you are | |
| 397 | looking for formatted human-readable | |
| 398 | output.</para></listitem> | |
| 393a2f9b | 399 | </varlistentry> |
| 5632e374 LP |
400 | |
| 401 | <varlistentry> | |
| 402 | <term><command>reset-maintenance [NAME...]</command></term> | |
| 403 | ||
| 404 | <listitem><para>Reset maintenance | |
| 405 | state of the specified units, or if no | |
| 406 | unit name is passed of all units. When | |
| 407 | a unit fails in some way (i.e. process | |
| 408 | exiting with non-zero error code, | |
| 409 | terminating abnormally or timing out) | |
| 410 | it will automatically enter | |
| 411 | maintenance state and its exit codes | |
| 412 | and status is recorded for | |
| 413 | introspection by the administrator | |
| 414 | until the service is restarted or | |
| 415 | reset with this | |
| 416 | command.</para></listitem> | |
| 417 | </varlistentry> | |
| 418 | ||
| ee5762e3 LP |
419 | <varlistentry> |
| 420 | <term><command>enable [NAME...]</command></term> | |
| 421 | ||
| 422 | <listitem><para>Enable one or more | |
| 423 | unit files, as specified on the | |
| 424 | command line. This will create a | |
| 425 | number of symlinks as encoded in the | |
| 426 | <literal>[Install]</literal> sections | |
| 427 | of the unit files. After the symlinks | |
| 428 | have been created the systemd | |
| 429 | configuration is reloaded (in a way | |
| 430 | that is equivalent to | |
| 431 | <command>daemon-reload</command>) to | |
| 432 | ensure the changes are taken into | |
| 433 | account immediately. Note that this | |
| 434 | does not have the effect that any of | |
| 435 | the units enabled are also started at | |
| 436 | the same time. If this is desired a | |
| 437 | seperate <command>start</command> | |
| 438 | command must be invoked for the | |
| 439 | unit.</para> | |
| 440 | ||
| 441 | <para>This command will | |
| 442 | print the actions executed. This | |
| 443 | output may be suppressed by passing | |
| 444 | <option>--quiet</option>.</para> | |
| 445 | ||
| 446 | <para>Note that this operation creates | |
| 447 | only the suggested symlinks for the | |
| 448 | units. While this command is the | |
| 449 | recommended way to manipulate the unit | |
| 450 | configuration directory, the | |
| 451 | administrator is free to make | |
| 452 | additional changes manually, by | |
| 453 | placing or removing symlinks in the | |
| 454 | directory. This is particular useful | |
| 455 | to create configurations that deviate | |
| 456 | from the suggested default | |
| 457 | installation. In this case the | |
| 458 | administrator must make sure to invoke | |
| 459 | <command>daemon-reload</command> | |
| 460 | manually as necessary, to ensure his | |
| 461 | changes are taken into account.</para> | |
| 462 | ||
| 463 | <para>Enabling units should not be | |
| 464 | confused with starting (activating) | |
| 465 | units, as done by the | |
| 466 | <command>start</command> | |
| 467 | command. Enabling and starting units | |
| 468 | is orthogonal: units may be enabled | |
| 469 | without being started and started | |
| 470 | without being enabled. Enabling simply | |
| 471 | hooks the unit into various suggested | |
| 472 | places (for example, so that the unit | |
| 473 | is automatically started on boot or | |
| 474 | when a particular kind of hardware is | |
| 475 | plugged in). Starting actually spawns | |
| 476 | the daemon process (in case of service | |
| 477 | units), or binds the socket (in case | |
| 478 | of socket units), and so | |
| 479 | on.</para> | |
| 480 | ||
| 481 | <para>Depending on whether | |
| 482 | <option>--system</option>, | |
| 483 | <option>--session</option> or | |
| 484 | <option>--global</option> is specified | |
| 485 | this enables the unit for the system, | |
| 486 | for sessions of the calling user only | |
| 487 | or for all future session of all | |
| 488 | users. Note that in the latter case no | |
| 489 | systemd daemon configuration is | |
| 490 | reloaded.</para> | |
| 491 | </listitem> | |
| 492 | </varlistentry> | |
| 493 | ||
| 494 | <varlistentry> | |
| 495 | <term><command>disable [NAME...]</command></term> | |
| 496 | ||
| 497 | <listitem><para>Disables one or more | |
| 498 | units. This removes all symlinks to | |
| 499 | the specified unit files from the unit | |
| 500 | configuration directory, and hence | |
| 501 | undoes the changes made by | |
| 502 | <command>enable</command>. Note | |
| 503 | however that this by default removes | |
| 504 | all symlinks to the unit files | |
| 505 | (i.e. including manual additions), not | |
| 506 | just those actually created by | |
| 507 | <command>enable</command>. If only the | |
| 508 | symlinks that are suggested by default | |
| 509 | shall be removed, pass | |
| 510 | <option>--defaults</option>. This | |
| 511 | implicitly reloads the systemd daemon | |
| 512 | configuration after completing the | |
| 513 | disabling of the units. Note that this | |
| 514 | command does not implicitly stop the | |
| 515 | units that is being disabled. If this | |
| 516 | is desired an additional | |
| 517 | <command>stop</command>command should | |
| 518 | be executed afterwards.</para> | |
| 519 | ||
| 520 | <para>This command will print the | |
| 521 | actions executed. This output may be | |
| 522 | suppressed by passing | |
| 523 | <option>--quiet</option>.</para> | |
| 524 | </listitem> | |
| 525 | ||
| 526 | <para>This command honours | |
| 527 | <option>--system</option>, | |
| 528 | <option>--session</option>, | |
| 529 | <option>--global</option> in a similar | |
| 530 | way as | |
| 531 | <command>enable</command>.</para> | |
| 532 | </varlistentry> | |
| 533 | ||
| 534 | <varlistentry> | |
| 535 | <term><command>is-enabled [NAME...]</command></term> | |
| 536 | ||
| 537 | <listitem><para>Checks whether any of | |
| 538 | the specified unit files is enabled | |
| 539 | (as with | |
| 540 | <command>enable</command>). Returns an | |
| 541 | exit code of 0 if at least one is | |
| 542 | enabled, non-zero | |
| 543 | otherwise.</para></listitem> | |
| 544 | </varlistentry> | |
| 545 | ||
| 393a2f9b LP |
546 | <varlistentry> |
| 547 | <term><command>load [NAME...]</command></term> | |
| 548 | ||
| 549 | <listitem><para>Load one or more units | |
| 550 | specified on the command line. This | |
| 551 | will simply load their configuration | |
| 552 | from disk, but not start them. To | |
| 553 | start them you need to use the | |
| 554 | <command>start</command> command which | |
| 555 | will implicitly load a unit that has | |
| 556 | not been loaded yet. Note that systemd | |
| 557 | garbage collects loaded units that are | |
| 558 | not active or referenced by an active | |
| 559 | unit. This means that units loaded | |
| 560 | this way will usually not stay loaded | |
| 561 | for long. Also note that this command | |
| 562 | cannot be used to reload unit | |
| 563 | configuration. Use the | |
| 564 | <command>daemon-reload</command> | |
| 565 | command for that. All in all, this | |
| 566 | command is of little use except for | |
| 567 | debugging.</para> | |
| 568 | <para>This command should not be | |
| 569 | confused with the | |
| 570 | <command>daemon-reload</command> or | |
| 571 | <command>reload</command> | |
| 572 | commands.</para></listitem> | |
| 573 | </varlistentry> | |
| 574 | <varlistentry> | |
| 575 | <term><command>list-jobs</command></term> | |
| 576 | ||
| 577 | <listitem><para>List jobs that are in progress.</para></listitem> | |
| 578 | </varlistentry> | |
| 579 | <varlistentry> | |
| 580 | <term><command>cancel [JOB...]</command></term> | |
| 581 | ||
| 582 | <listitem><para>Cancel one or more | |
| 583 | jobs specified on the command line by | |
| 584 | their numeric job | |
| ee5762e3 | 585 | IDs. If not job id is specified cancels all jobs that are pending.</para></listitem> |
| 393a2f9b | 586 | </varlistentry> |
| 7874bcd6 LP |
587 | <varlistentry> |
| 588 | <term><command>monitor</command></term> | |
| 589 | ||
| 590 | <listitem><para>Monitor unit/job | |
| 591 | changes. This is mostly useful for | |
| 592 | debugging purposes and prints a line | |
| 593 | each time systemd loads or unloads a | |
| 594 | unit configuration file, or a unit | |
| 595 | property changes.</para></listitem> | |
| 596 | </varlistentry> | |
| 597 | <varlistentry> | |
| 598 | <term><command>dump</command></term> | |
| 599 | ||
| 600 | <listitem><para>Dump server | |
| 601 | status. This will output a (usually | |
| 602 | very long) human readable manager | |
| 603 | status dump. Its format is subject to | |
| 604 | change without notice and should not | |
| 605 | be parsed by | |
| 606 | applications.</para></listitem> | |
| 607 | </varlistentry> | |
| 4445a875 LP |
608 | <varlistentry> |
| 609 | <term><command>dot</command></term> | |
| 610 | ||
| 611 | <listitem><para>Generate textual | |
| 612 | dependency graph description in dot | |
| 613 | format for further processing with the | |
| 614 | GraphViz | |
| 615 | <citerefentry><refentrytitle>dot</refentrytitle><manvolnum>1</manvolnum></citerefentry> | |
| 616 | tool. Use a command line like | |
| 617 | <command>systemctl dot | dot -Tsvg > | |
| 618 | systemd.svg</command> to generate a | |
| 619 | graphical dependency tree. Unless | |
| 620 | <option>--order</option> or | |
| 621 | <option>--require</option> is passed | |
| 622 | the generated graph will show both | |
| 623 | ordering and requirement | |
| 624 | dependencies.</para></listitem> | |
| 625 | </varlistentry> | |
| 7874bcd6 LP |
626 | <varlistentry> |
| 627 | <term><command>snapshot [NAME]</command></term> | |
| 628 | ||
| 629 | <listitem><para>Create a snapshot. If | |
| af62c704 | 630 | a snapshot name is specified, the new |
| 7874bcd6 LP |
631 | snapshot will be named after it. If |
| 632 | none is specified an automatic | |
| 633 | snapshot name is generated. In either | |
| 7594fb25 LP |
634 | case, the snapshot name used is |
| 635 | printed to STDOUT, unless | |
| 636 | <option>--quiet</option> is | |
| 637 | specified.</para> | |
| 7874bcd6 LP |
638 | |
| 639 | <para>A snapshot refers to a saved | |
| 640 | state of the systemd manager. It is | |
| 641 | implemented itself as unit that is | |
| 642 | generated dynamically with this | |
| 643 | command and has dependencies on all | |
| 644 | units active at the time. At a later | |
| 645 | time the user may return to this state | |
| 646 | by using the | |
| 647 | <command>isolate</command> command on | |
| 648 | the snapshot unit.</para></listitem> | |
| 649 | ||
| 650 | <para>Snapshots are only useful for | |
| 651 | saving and restoring which units are | |
| 652 | running or are stopped, they do not | |
| 653 | save/restore any other | |
| 654 | state. Snapshots are dynamic and lost | |
| 655 | on reboot.</para> | |
| 656 | </varlistentry> | |
| 657 | <varlistentry> | |
| 6759e7a7 LP |
658 | <term><command>delete [NAME...]</command></term> |
| 659 | ||
| 660 | <listitem><para>Remove a snapshot | |
| 661 | previously created with | |
| 662 | <command>snapshot</command>.</para></listitem> | |
| 663 | </varlistentry> | |
| 664 | <varlistentry> | |
| 7874bcd6 LP |
665 | <term><command>daemon-reload</command></term> |
| 666 | ||
| 667 | <listitem><para>Reload systemd manager | |
| 668 | configuration. This will reload all | |
| 669 | unit files and recreate the entire | |
| 670 | dependency tree. While the daemon is | |
| af62c704 | 671 | reloaded, all sockets systemd listens |
| ad678a06 | 672 | on on behalf of user configuration will |
| 7874bcd6 LP |
673 | stay accessible.</para> <para>This |
| 674 | command should not be confused with | |
| 675 | the <command>load</command> or | |
| 676 | <command>reload</command> | |
| 677 | commands.</para></listitem> | |
| 678 | </varlistentry> | |
| 679 | <varlistentry> | |
| 680 | <term><command>daemon-reexec</command></term> | |
| 681 | ||
| 682 | <listitem><para>Reexecute the systemd | |
| 683 | manager. This will serialize the | |
| 684 | manager state, reexecute the process | |
| 685 | and deserialize the state again. This | |
| 686 | command is of little use except for | |
| 687 | debugging and package | |
| 688 | upgrades. Sometimes it might be | |
| 689 | helpful as a heavy-weight | |
| 690 | <command>daemon-reload</command>. While | |
| 691 | the daemon is reexecuted all sockets | |
| 692 | systemd listens on on behalf of user | |
| 693 | configuration will stay | |
| 694 | accessible.</para></listitem> | |
| 695 | </varlistentry> | |
| 696 | <varlistentry> | |
| 697 | <term><command>daemon-exit</command></term> | |
| 698 | ||
| 699 | <listitem><para>Ask the systemd | |
| 700 | manager to quit. This is only | |
| 701 | supported for session managers | |
| 702 | (i.e. in conjunction with the | |
| 703 | <option>--session</option> option) and | |
| 704 | will fail otherwise.</para></listitem> | |
| 705 | </varlistentry> | |
| 706 | <varlistentry> | |
| 707 | <term><command>show-environment</command></term> | |
| 708 | ||
| 709 | <listitem><para>Dump the systemd | |
| 710 | manager environment block. The | |
| 711 | environment block will be dumped in | |
| 712 | straight-forward form suitable for | |
| 713 | sourcing into a shell script. This | |
| 714 | environment block will be passed to | |
| 715 | all processes the manager | |
| 716 | spawns.</para></listitem> | |
| 717 | </varlistentry> | |
| 718 | <varlistentry> | |
| 719 | <term><command>set-environment [NAME=VALUE...]</command></term> | |
| 720 | ||
| 721 | <listitem><para>Set one or more | |
| 722 | systemd manager environment variables, | |
| 723 | as specified on the command | |
| 724 | line.</para></listitem> | |
| 725 | </varlistentry> | |
| 726 | <varlistentry> | |
| 727 | <term><command>unset-environment [NAME...]</command></term> | |
| 728 | ||
| 729 | <listitem><para>Unset one or more | |
| 730 | systemd manager environment | |
| 731 | variables. If only a variable name is | |
| 732 | specified it will be removed | |
| 733 | regardless of its value. If a variable | |
| 734 | and a value are specified the variable | |
| 735 | is only removed if it has the | |
| 736 | specified value.</para></listitem> | |
| 737 | </varlistentry> | |
| 738 | ||
| 739 | <varlistentry> | |
| 740 | <term><command>halt</command></term> | |
| 741 | ||
| 742 | <listitem><para>Shut down and halt the | |
| 743 | system. This is mostly equivalent to | |
| 744 | <command>start halt.target</command> | |
| 745 | but also prints a wall message to all | |
| 746 | users.</para></listitem> | |
| 747 | </varlistentry> | |
| 748 | <varlistentry> | |
| 749 | <term><command>poweroff</command></term> | |
| 750 | ||
| 751 | <listitem><para>Shut down and | |
| 752 | power-off the system. This is mostly | |
| 753 | equivalent to <command>start | |
| 754 | poweroff.target</command> but also | |
| 755 | prints a wall message to all | |
| 756 | users.</para></listitem> | |
| 757 | </varlistentry> | |
| 758 | <varlistentry> | |
| 759 | <term><command>reboot</command></term> | |
| 760 | ||
| 761 | <listitem><para>Shut down and | |
| 762 | reboot the system. This is mostly | |
| 763 | equivalent to <command>start | |
| 764 | reboot.target</command> but also | |
| 765 | prints a wall message to all | |
| 766 | users.</para></listitem> | |
| 767 | </varlistentry> | |
| 768 | <varlistentry> | |
| 769 | <term><command>default</command></term> | |
| 770 | ||
| 771 | <listitem><para>Enter default | |
| 772 | mode. This is mostly equivalent to | |
| 773 | <command>start | |
| 774 | default.target</command>.</para></listitem> | |
| 775 | </varlistentry> | |
| 776 | <varlistentry> | |
| 777 | <term><command>rescue</command></term> | |
| 778 | ||
| 779 | <listitem><para>Enter rescue | |
| 780 | mode. This is mostly equivalent to | |
| 781 | <command>isolate | |
| 782 | rescue.target</command> but also | |
| 783 | prints a wall message to all | |
| 784 | users.</para></listitem> | |
| 785 | </varlistentry> | |
| 786 | <varlistentry> | |
| 787 | <term><command>emergency</command></term> | |
| 788 | ||
| 789 | <listitem><para>Enter emergency | |
| 790 | mode. This is mostly equivalent to | |
| 791 | <command>isolate | |
| f057408c | 792 | emergency.target</command> but also |
| 7874bcd6 LP |
793 | prints a wall message to all |
| 794 | users.</para></listitem> | |
| 795 | </varlistentry> | |
| 796 | </variablelist> | |
| 797 | ||
| 798 | </refsect1> | |
| 799 | ||
| 800 | <refsect1> | |
| 801 | <title>Exit status</title> | |
| 802 | ||
| 803 | <para>On success 0 is returned, a non-zero failure | |
| 804 | code otherwise.</para> | |
| 805 | </refsect1> | |
| 806 | ||
| 807 | <refsect1> | |
| 808 | <title>See Also</title> | |
| 809 | <para> | |
| 810 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
| 811 | <citerefentry><refentrytitle>systemadm</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
| 812 | <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
| 813 | <citerefentry><refentrytitle>systemd.special</refentrytitle><manvolnum>7</manvolnum></citerefentry>, | |
| 814 | <citerefentry><refentrytitle>wall</refentrytitle><manvolnum>1</manvolnum></citerefentry> | |
| 815 | </para> | |
| 816 | </refsect1> | |
| 817 | ||
| 818 | </refentry> |