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 | ||
| 24 | <refentry id="systemd-install"> | |
| 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 | |
| 99 | display to certain property names. If | |
| 100 | not specified all set properties are | |
| 101 | shown. The argument should be a | |
| 102 | property name, such as | |
| 103 | <literal>MainPID</literal>.</para></listitem> | |
| 104 | </varlistentry> | |
| 105 | ||
| 7874bcd6 LP |
106 | <varlistentry> |
| 107 | <term><option>--all</option></term> | |
| 7594fb25 | 108 | <term><option>-a</option></term> |
| 7874bcd6 LP |
109 | |
| 110 | <listitem><para>When listing units, | |
| 111 | show all units, regardless of their | |
| 393a2f9b LP |
112 | state, including inactive units. When |
| 113 | showing unit/job/manager information, | |
| 114 | show all properties regardless whether | |
| 115 | they are set or not.</para></listitem> | |
| 7874bcd6 LP |
116 | </varlistentry> |
| 117 | ||
| 118 | <varlistentry> | |
| 90d473a1 | 119 | <term><option>--fail</option></term> |
| 7874bcd6 LP |
120 | |
| 121 | <listitem><para>If the requested | |
| 436c44a5 | 122 | operation conflicts with an existing |
| 90d473a1 LP |
123 | unfinished operation, fail the |
| 124 | command. If this is not specified the | |
| 125 | requested operation will replace the | |
| 126 | pending job if | |
| 127 | necessary.</para></listitem> | |
| 7874bcd6 LP |
128 | </varlistentry> |
| 129 | ||
| 4445a875 LP |
130 | <varlistentry> |
| 131 | <term><option>--order</option></term> | |
| 132 | <term><option>--require</option></term> | |
| 133 | ||
| 134 | <listitem><para>When used in | |
| 135 | conjunction with the | |
| 136 | <command>dot</command> command (see | |
| 137 | below), selects which dependencies are | |
| 138 | shown in the dependency graph. If | |
| 139 | <option>--order</option> is passed | |
| 140 | only dependencies of type | |
| 141 | <varname>After=</varname> or | |
| 142 | <varname>Before=</varname> are | |
| 143 | shown. If <option>--require</option> | |
| 144 | is passed only dependencies of type | |
| 145 | <varname>Requires=</varname>, | |
| 146 | <varname>RequiresOverridable=</varname>, | |
| 147 | <varname>Requisite=</varname>, | |
| 148 | <varname>RequisiteOverridable=</varname>, | |
| 149 | <varname>Wants=</varname> and | |
| 150 | <varname>Conflicts=</varname> are | |
| 151 | shown. If neither is passed, shows | |
| 152 | dependencies of all these | |
| 153 | types.</para></listitem> | |
| 154 | </varlistentry> | |
| 155 | ||
| 7874bcd6 LP |
156 | <varlistentry> |
| 157 | <term><option>--system</option></term> | |
| 158 | ||
| 159 | <listitem><para>Talk to the systemd | |
| 160 | system manager. (Default)</para></listitem> | |
| 161 | </varlistentry> | |
| 162 | ||
| 163 | <varlistentry> | |
| 164 | <term><option>--session</option></term> | |
| 165 | ||
| 166 | <listitem><para>Talk to the systemd | |
| 167 | session manager of the calling user.</para></listitem> | |
| 168 | </varlistentry> | |
| 169 | ||
| 170 | <varlistentry> | |
| 7594fb25 LP |
171 | <term><option>--no-block</option></term> |
| 172 | ||
| 225fdfd3 LP |
173 | <listitem><para>Do not synchronously wait for |
| 174 | the requested operation to finish. If this is | |
| 175 | not specified the job will be verified, | |
| 176 | enqueued and <command>systemctl</command> will | |
| 177 | wait until it is completed. By passing this | |
| 178 | argument it is only verified and | |
| 179 | enqueued.</para></listitem> </varlistentry> | |
| 7594fb25 LP |
180 | |
| 181 | <varlistentry> | |
| 182 | <term><option>--quiet</option></term> | |
| 183 | <term><option>-q</option></term> | |
| 7874bcd6 | 184 | |
| 7594fb25 LP |
185 | <listitem><para>Suppress output to |
| 186 | STDOUT for <command>snapshot</command> | |
| 187 | and | |
| 188 | <command>check</command>.</para></listitem> | |
| 7874bcd6 LP |
189 | </varlistentry> |
| 190 | ||
| 191 | <varlistentry> | |
| 192 | <term><option>--no-wall</option></term> | |
| 193 | ||
| 194 | <listitem><para>Don't send wall | |
| 195 | message before | |
| 196 | halt, power-off, reboot.</para></listitem> | |
| 197 | </varlistentry> | |
| 198 | </variablelist> | |
| 199 | ||
| 200 | <para>The following commands are understood:</para> | |
| 201 | ||
| 202 | <variablelist> | |
| 203 | <varlistentry> | |
| 204 | <term><command>list-units</command></term> | |
| 205 | ||
| 206 | <listitem><para>List known units.</para></listitem> | |
| 207 | </varlistentry> | |
| 7874bcd6 LP |
208 | <varlistentry> |
| 209 | <term><command>start [NAME...]</command></term> | |
| 210 | ||
| 211 | <listitem><para>Start one or more | |
| 212 | units specified on the command | |
| 213 | line.</para></listitem> | |
| 214 | </varlistentry> | |
| 215 | <varlistentry> | |
| 216 | <term><command>stop [NAME...]</command></term> | |
| 217 | ||
| 218 | <listitem><para>Stop one or more units | |
| 219 | specified on the command | |
| 220 | line.</para></listitem> | |
| 221 | </varlistentry> | |
| 7874bcd6 LP |
222 | <varlistentry> |
| 223 | <term><command>reload [NAME...]</command></term> | |
| 224 | ||
| 225 | <listitem><para>Asks all services | |
| 226 | whose units are listed on the command | |
| 227 | line to reload their | |
| 228 | configuration. Note that this will | |
| 229 | reload the daemon configuration | |
| 230 | itself, not the unit configuration | |
| 231 | file of systemd. If you want systemd | |
| 232 | to reload the configuration file of a | |
| 233 | unit use the | |
| 234 | <command>daemon-reload</command> | |
| 235 | command. In other words: for the | |
| 236 | example case of Apache, this will | |
| 237 | reload Apache's | |
| 238 | <filename>httpd.conf</filename> in the | |
| 239 | web server, not the | |
| 240 | <filename>apache.service</filename> | |
| 241 | systemd unit file. </para> <para>This | |
| 242 | command should not be confused with | |
| 243 | the <command>daemon-reload</command> | |
| 244 | or <command>load</command> | |
| 245 | commands.</para></listitem> | |
| 246 | ||
| 247 | </varlistentry> | |
| 248 | <varlistentry> | |
| 6f28c033 LP |
249 | <term><command>restart [NAME...]</command></term> |
| 250 | ||
| 251 | <listitem><para>Restart one or more | |
| 252 | units specified on the command | |
| 253 | line. If the units are not running yet | |
| 254 | they will be | |
| 255 | started.</para></listitem> | |
| 256 | </varlistentry> | |
| 257 | <varlistentry> | |
| 258 | <term><command>try-restart [NAME...]</command></term> | |
| 259 | ||
| 260 | <listitem><para>Restart one or more | |
| 261 | units specified on the command | |
| 262 | line. If the units are not running yet | |
| 263 | the operation will | |
| 264 | fail.</para></listitem> | |
| 265 | </varlistentry> | |
| 266 | <varlistentry> | |
| 267 | <term><command>reload-or-restart [NAME...]</command></term> | |
| 268 | <term><command>reload-or-try-restart [NAME...]</command></term> | |
| 269 | ||
| 270 | <listitem><para>Reload one or more | |
| 271 | units if they support it. If not | |
| 272 | restart them | |
| 273 | instead.</para></listitem> | |
| 274 | </varlistentry> | |
| 275 | <varlistentry> | |
| 7874bcd6 LP |
276 | <term><command>isolate [NAME]</command></term> |
| 277 | ||
| 278 | <listitem><para>Start the unit | |
| 279 | specified on the command line and its | |
| 280 | dependencies and stop all | |
| 281 | others.</para></listitem> | |
| 282 | </varlistentry> | |
| 7594fb25 LP |
283 | <varlistentry> |
| 284 | <term><command>check [NAME...]</command></term> | |
| 285 | ||
| 286 | <listitem><para>Check whether any of | |
| 287 | the specified units is active | |
| 288 | (i.e. running). Returns 0 if at least | |
| 289 | one is active, non-zero | |
| 290 | otherwise. Unless | |
| 291 | <option>--quiet</option> is specified | |
| 292 | this will also print the current unit | |
| 293 | state to STDOUT.</para></listitem> | |
| 294 | </varlistentry> | |
| 61cbdc4b LP |
295 | <varlistentry> |
| 296 | <term><command>status [NAME...]</command></term> | |
| 297 | ||
| 298 | <listitem><para>Show short status | |
| 299 | information about one or more | |
| 300 | units. This shows terse runtime | |
| 301 | information about | |
| 302 | units.</para></listitem> | |
| 303 | </varlistentry> | |
| 393a2f9b LP |
304 | <varlistentry> |
| 305 | <term><command>show [NAME...|JOB...]</command></term> | |
| 306 | ||
| 61cbdc4b | 307 | <listitem><para>Show properties of |
| 393a2f9b LP |
308 | one or more units, jobs or the manager |
| 309 | itself. If no argument is specified | |
| 61cbdc4b | 310 | properties of the manager will be |
| 393a2f9b | 311 | shown. If a unit name is specified |
| 61cbdc4b | 312 | properties of the unit is shown, |
| 393a2f9b | 313 | and if a job id is specified |
| 61cbdc4b | 314 | properties of the job is |
| 393a2f9b LP |
315 | shown.</para></listitem> |
| 316 | </varlistentry> | |
| 317 | <varlistentry> | |
| 318 | <term><command>load [NAME...]</command></term> | |
| 319 | ||
| 320 | <listitem><para>Load one or more units | |
| 321 | specified on the command line. This | |
| 322 | will simply load their configuration | |
| 323 | from disk, but not start them. To | |
| 324 | start them you need to use the | |
| 325 | <command>start</command> command which | |
| 326 | will implicitly load a unit that has | |
| 327 | not been loaded yet. Note that systemd | |
| 328 | garbage collects loaded units that are | |
| 329 | not active or referenced by an active | |
| 330 | unit. This means that units loaded | |
| 331 | this way will usually not stay loaded | |
| 332 | for long. Also note that this command | |
| 333 | cannot be used to reload unit | |
| 334 | configuration. Use the | |
| 335 | <command>daemon-reload</command> | |
| 336 | command for that. All in all, this | |
| 337 | command is of little use except for | |
| 338 | debugging.</para> | |
| 339 | <para>This command should not be | |
| 340 | confused with the | |
| 341 | <command>daemon-reload</command> or | |
| 342 | <command>reload</command> | |
| 343 | commands.</para></listitem> | |
| 344 | </varlistentry> | |
| 345 | <varlistentry> | |
| 346 | <term><command>list-jobs</command></term> | |
| 347 | ||
| 348 | <listitem><para>List jobs that are in progress.</para></listitem> | |
| 349 | </varlistentry> | |
| 350 | <varlistentry> | |
| 351 | <term><command>cancel [JOB...]</command></term> | |
| 352 | ||
| 353 | <listitem><para>Cancel one or more | |
| 354 | jobs specified on the command line by | |
| 355 | their numeric job | |
| 356 | IDs.</para></listitem> | |
| 357 | </varlistentry> | |
| 358 | <varlistentry> | |
| 359 | <term><command>clear-jobs</command></term> | |
| 360 | ||
| 361 | <listitem><para>Cancel all jobs that are in progress.</para></listitem> | |
| 362 | </varlistentry> | |
| 7874bcd6 LP |
363 | <varlistentry> |
| 364 | <term><command>monitor</command></term> | |
| 365 | ||
| 366 | <listitem><para>Monitor unit/job | |
| 367 | changes. This is mostly useful for | |
| 368 | debugging purposes and prints a line | |
| 369 | each time systemd loads or unloads a | |
| 370 | unit configuration file, or a unit | |
| 371 | property changes.</para></listitem> | |
| 372 | </varlistentry> | |
| 373 | <varlistentry> | |
| 374 | <term><command>dump</command></term> | |
| 375 | ||
| 376 | <listitem><para>Dump server | |
| 377 | status. This will output a (usually | |
| 378 | very long) human readable manager | |
| 379 | status dump. Its format is subject to | |
| 380 | change without notice and should not | |
| 381 | be parsed by | |
| 382 | applications.</para></listitem> | |
| 383 | </varlistentry> | |
| 4445a875 LP |
384 | <varlistentry> |
| 385 | <term><command>dot</command></term> | |
| 386 | ||
| 387 | <listitem><para>Generate textual | |
| 388 | dependency graph description in dot | |
| 389 | format for further processing with the | |
| 390 | GraphViz | |
| 391 | <citerefentry><refentrytitle>dot</refentrytitle><manvolnum>1</manvolnum></citerefentry> | |
| 392 | tool. Use a command line like | |
| 393 | <command>systemctl dot | dot -Tsvg > | |
| 394 | systemd.svg</command> to generate a | |
| 395 | graphical dependency tree. Unless | |
| 396 | <option>--order</option> or | |
| 397 | <option>--require</option> is passed | |
| 398 | the generated graph will show both | |
| 399 | ordering and requirement | |
| 400 | dependencies.</para></listitem> | |
| 401 | </varlistentry> | |
| 7874bcd6 LP |
402 | <varlistentry> |
| 403 | <term><command>snapshot [NAME]</command></term> | |
| 404 | ||
| 405 | <listitem><para>Create a snapshot. If | |
| af62c704 | 406 | a snapshot name is specified, the new |
| 7874bcd6 LP |
407 | snapshot will be named after it. If |
| 408 | none is specified an automatic | |
| 409 | snapshot name is generated. In either | |
| 7594fb25 LP |
410 | case, the snapshot name used is |
| 411 | printed to STDOUT, unless | |
| 412 | <option>--quiet</option> is | |
| 413 | specified.</para> | |
| 7874bcd6 LP |
414 | |
| 415 | <para>A snapshot refers to a saved | |
| 416 | state of the systemd manager. It is | |
| 417 | implemented itself as unit that is | |
| 418 | generated dynamically with this | |
| 419 | command and has dependencies on all | |
| 420 | units active at the time. At a later | |
| 421 | time the user may return to this state | |
| 422 | by using the | |
| 423 | <command>isolate</command> command on | |
| 424 | the snapshot unit.</para></listitem> | |
| 425 | ||
| 426 | <para>Snapshots are only useful for | |
| 427 | saving and restoring which units are | |
| 428 | running or are stopped, they do not | |
| 429 | save/restore any other | |
| 430 | state. Snapshots are dynamic and lost | |
| 431 | on reboot.</para> | |
| 432 | </varlistentry> | |
| 433 | <varlistentry> | |
| 6759e7a7 LP |
434 | <term><command>delete [NAME...]</command></term> |
| 435 | ||
| 436 | <listitem><para>Remove a snapshot | |
| 437 | previously created with | |
| 438 | <command>snapshot</command>.</para></listitem> | |
| 439 | </varlistentry> | |
| 440 | <varlistentry> | |
| 7874bcd6 LP |
441 | <term><command>daemon-reload</command></term> |
| 442 | ||
| 443 | <listitem><para>Reload systemd manager | |
| 444 | configuration. This will reload all | |
| 445 | unit files and recreate the entire | |
| 446 | dependency tree. While the daemon is | |
| af62c704 | 447 | reloaded, all sockets systemd listens |
| ad678a06 | 448 | on on behalf of user configuration will |
| 7874bcd6 LP |
449 | stay accessible.</para> <para>This |
| 450 | command should not be confused with | |
| 451 | the <command>load</command> or | |
| 452 | <command>reload</command> | |
| 453 | commands.</para></listitem> | |
| 454 | </varlistentry> | |
| 455 | <varlistentry> | |
| 456 | <term><command>daemon-reexec</command></term> | |
| 457 | ||
| 458 | <listitem><para>Reexecute the systemd | |
| 459 | manager. This will serialize the | |
| 460 | manager state, reexecute the process | |
| 461 | and deserialize the state again. This | |
| 462 | command is of little use except for | |
| 463 | debugging and package | |
| 464 | upgrades. Sometimes it might be | |
| 465 | helpful as a heavy-weight | |
| 466 | <command>daemon-reload</command>. While | |
| 467 | the daemon is reexecuted all sockets | |
| 468 | systemd listens on on behalf of user | |
| 469 | configuration will stay | |
| 470 | accessible.</para></listitem> | |
| 471 | </varlistentry> | |
| 472 | <varlistentry> | |
| 473 | <term><command>daemon-exit</command></term> | |
| 474 | ||
| 475 | <listitem><para>Ask the systemd | |
| 476 | manager to quit. This is only | |
| 477 | supported for session managers | |
| 478 | (i.e. in conjunction with the | |
| 479 | <option>--session</option> option) and | |
| 480 | will fail otherwise.</para></listitem> | |
| 481 | </varlistentry> | |
| 482 | <varlistentry> | |
| 483 | <term><command>show-environment</command></term> | |
| 484 | ||
| 485 | <listitem><para>Dump the systemd | |
| 486 | manager environment block. The | |
| 487 | environment block will be dumped in | |
| 488 | straight-forward form suitable for | |
| 489 | sourcing into a shell script. This | |
| 490 | environment block will be passed to | |
| 491 | all processes the manager | |
| 492 | spawns.</para></listitem> | |
| 493 | </varlistentry> | |
| 494 | <varlistentry> | |
| 495 | <term><command>set-environment [NAME=VALUE...]</command></term> | |
| 496 | ||
| 497 | <listitem><para>Set one or more | |
| 498 | systemd manager environment variables, | |
| 499 | as specified on the command | |
| 500 | line.</para></listitem> | |
| 501 | </varlistentry> | |
| 502 | <varlistentry> | |
| 503 | <term><command>unset-environment [NAME...]</command></term> | |
| 504 | ||
| 505 | <listitem><para>Unset one or more | |
| 506 | systemd manager environment | |
| 507 | variables. If only a variable name is | |
| 508 | specified it will be removed | |
| 509 | regardless of its value. If a variable | |
| 510 | and a value are specified the variable | |
| 511 | is only removed if it has the | |
| 512 | specified value.</para></listitem> | |
| 513 | </varlistentry> | |
| 514 | ||
| 515 | <varlistentry> | |
| 516 | <term><command>halt</command></term> | |
| 517 | ||
| 518 | <listitem><para>Shut down and halt the | |
| 519 | system. This is mostly equivalent to | |
| 520 | <command>start halt.target</command> | |
| 521 | but also prints a wall message to all | |
| 522 | users.</para></listitem> | |
| 523 | </varlistentry> | |
| 524 | <varlistentry> | |
| 525 | <term><command>poweroff</command></term> | |
| 526 | ||
| 527 | <listitem><para>Shut down and | |
| 528 | power-off the system. This is mostly | |
| 529 | equivalent to <command>start | |
| 530 | poweroff.target</command> but also | |
| 531 | prints a wall message to all | |
| 532 | users.</para></listitem> | |
| 533 | </varlistentry> | |
| 534 | <varlistentry> | |
| 535 | <term><command>reboot</command></term> | |
| 536 | ||
| 537 | <listitem><para>Shut down and | |
| 538 | reboot the system. This is mostly | |
| 539 | equivalent to <command>start | |
| 540 | reboot.target</command> but also | |
| 541 | prints a wall message to all | |
| 542 | users.</para></listitem> | |
| 543 | </varlistentry> | |
| 544 | <varlistentry> | |
| 545 | <term><command>default</command></term> | |
| 546 | ||
| 547 | <listitem><para>Enter default | |
| 548 | mode. This is mostly equivalent to | |
| 549 | <command>start | |
| 550 | default.target</command>.</para></listitem> | |
| 551 | </varlistentry> | |
| 552 | <varlistentry> | |
| 553 | <term><command>rescue</command></term> | |
| 554 | ||
| 555 | <listitem><para>Enter rescue | |
| 556 | mode. This is mostly equivalent to | |
| 557 | <command>isolate | |
| 558 | rescue.target</command> but also | |
| 559 | prints a wall message to all | |
| 560 | users.</para></listitem> | |
| 561 | </varlistentry> | |
| 562 | <varlistentry> | |
| 563 | <term><command>emergency</command></term> | |
| 564 | ||
| 565 | <listitem><para>Enter emergency | |
| 566 | mode. This is mostly equivalent to | |
| 567 | <command>isolate | |
| f057408c | 568 | emergency.target</command> but also |
| 7874bcd6 LP |
569 | prints a wall message to all |
| 570 | users.</para></listitem> | |
| 571 | </varlistentry> | |
| 572 | </variablelist> | |
| 573 | ||
| 574 | </refsect1> | |
| 575 | ||
| 576 | <refsect1> | |
| 577 | <title>Exit status</title> | |
| 578 | ||
| 579 | <para>On success 0 is returned, a non-zero failure | |
| 580 | code otherwise.</para> | |
| 581 | </refsect1> | |
| 582 | ||
| 583 | <refsect1> | |
| 584 | <title>See Also</title> | |
| 585 | <para> | |
| 586 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
| 587 | <citerefentry><refentrytitle>systemadm</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
| 588 | <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
| 589 | <citerefentry><refentrytitle>systemd.special</refentrytitle><manvolnum>7</manvolnum></citerefentry>, | |
| 590 | <citerefentry><refentrytitle>wall</refentrytitle><manvolnum>1</manvolnum></citerefentry> | |
| 591 | </para> | |
| 592 | </refsect1> | |
| 593 | ||
| 594 | </refentry> |