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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 | |
5430f7f2 LP |
11 | under the terms of the GNU Lesser General Public License as published by |
12 | the Free Software Foundation; either version 2.1 of the License, or | |
9f235308 LP |
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 | |
5430f7f2 | 18 | Lesser General Public License for more details. |
9f235308 | 19 | |
5430f7f2 | 20 | You should have received a copy of the GNU Lesser General Public License |
9f235308 LP |
21 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
22 | --> | |
23 | ||
24 | <refentry id="systemd.special"> | |
25 | ||
26 | <refentryinfo> | |
27 | <title>systemd.special</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>systemd.special</refentrytitle> | |
42 | <manvolnum>7</manvolnum> | |
43 | </refmeta> | |
44 | ||
45 | <refnamediv> | |
46 | <refname>systemd.special</refname> | |
feb88c9f | 47 | <refpurpose>Special systemd units</refpurpose> |
9f235308 LP |
48 | </refnamediv> |
49 | ||
50 | <refsynopsisdiv> | |
9f2c5942 | 51 | <para><filename>basic.target</filename>, |
49dbfa7b | 52 | <filename>bluetooth.target</filename>, |
9f2c5942 | 53 | <filename>ctrl-alt-del.target</filename>, |
49dbfa7b | 54 | <filename>cryptsetup.target</filename>, |
83bda358 | 55 | <filename>dbus.service</filename>, |
feb88c9f | 56 | <filename>dbus.socket</filename>, |
9f2c5942 | 57 | <filename>default.target</filename>, |
1e287fe3 | 58 | <filename>display-manager.service</filename>, |
f057408c | 59 | <filename>emergency.target</filename>, |
0e0320e0 LP |
60 | <filename>exit.target</filename>, |
61 | <filename>final.target</filename>, | |
49dbfa7b | 62 | <filename>getty.target</filename>, |
9f2c5942 | 63 | <filename>graphical.target</filename>, |
6edd7d0a | 64 | <filename>hibernate.target</filename>, |
feb88c9f | 65 | <filename>http-daemon.target</filename>, |
9f2c5942 LP |
66 | <filename>halt.target</filename>, |
67 | <filename>kbrequest.target</filename>, | |
feb88c9f | 68 | <filename>kexec.target</filename>, |
9f2c5942 | 69 | <filename>local-fs.target</filename>, |
21e557ed | 70 | <filename>local-fs-pre.target</filename>, |
683f468c | 71 | <filename>mail-transfer-agent.target</filename>, |
9f2c5942 LP |
72 | <filename>multi-user.target</filename>, |
73 | <filename>network.target</filename>, | |
74 | <filename>nss-lookup.target</filename>, | |
49dbfa7b | 75 | <filename>nss-user-lookup.target</filename>, |
9f2c5942 | 76 | <filename>poweroff.target</filename>, |
49dbfa7b | 77 | <filename>printer.target</filename>, |
9f2c5942 LP |
78 | <filename>reboot.target</filename>, |
79 | <filename>remote-fs.target</filename>, | |
21e557ed | 80 | <filename>remote-fs-pre.target</filename>, |
9f2c5942 LP |
81 | <filename>rescue.target</filename>, |
82 | <filename>rpcbind.target</filename>, | |
9f2c5942 LP |
83 | <filename>runlevel2.target</filename>, |
84 | <filename>runlevel3.target</filename>, | |
85 | <filename>runlevel4.target</filename>, | |
86 | <filename>runlevel5.target</filename>, | |
9f2c5942 LP |
87 | <filename>shutdown.target</filename>, |
88 | <filename>sigpwr.target</filename>, | |
6edd7d0a | 89 | <filename>sleep.target</filename>, |
49dbfa7b | 90 | <filename>smartcard.target</filename>, |
9f2c5942 | 91 | <filename>sockets.target</filename>, |
49dbfa7b | 92 | <filename>sound.target</filename>, |
6edd7d0a | 93 | <filename>suspend.target</filename>, |
9f2c5942 | 94 | <filename>swap.target</filename>, |
f92a18f5 | 95 | <filename>sysinit.target</filename>, |
feb88c9f LP |
96 | <filename>syslog.service</filename>, |
97 | <filename>syslog.socket</filename>, | |
62adf224 | 98 | <filename>syslog.target</filename>, |
f5ccf26d | 99 | <filename>system-update.target</filename>, |
db47cc2a | 100 | <filename>time-sync.target</filename>, |
3b6fdb5b | 101 | <filename>umount.target</filename></para> |
9f235308 LP |
102 | </refsynopsisdiv> |
103 | ||
104 | <refsect1> | |
105 | <title>Description</title> | |
106 | ||
107 | <para>A few units are treated specially by | |
108 | systemd. They have special internal semantics and | |
109 | cannot be renamed.</para> | |
110 | </refsect1> | |
111 | ||
112 | <refsect1> | |
113 | <title>Special System Units</title> | |
114 | ||
115 | <variablelist> | |
bd3d19a4 LP |
116 | <varlistentry> |
117 | <term><filename>basic.target</filename></term> | |
118 | <listitem> | |
119 | <para>A special target unit | |
120 | covering early boot-up.</para> | |
121 | <para>systemd automatically | |
122 | adds dependencies of the types | |
123 | Requires and After for this | |
124 | target unit to all SysV | |
125 | service units configured for | |
126 | runlevel 1 to 5.</para> | |
af62c704 KS |
127 | <para>Usually this should pull-in |
128 | all sockets, mount points, | |
f92a18f5 LP |
129 | swap devices and other basic |
130 | initialization necessary for | |
131 | the general purpose | |
af62c704 | 132 | daemons. Most normal daemons |
f92a18f5 LP |
133 | should have dependencies of |
134 | type After and Requires on | |
135 | this unit.</para> | |
bd3d19a4 LP |
136 | </listitem> |
137 | </varlistentry> | |
49dbfa7b LP |
138 | <varlistentry> |
139 | <term><filename>bluetooth.target</filename></term> | |
140 | <listitem> | |
141 | <para>This target is started | |
142 | automatically as soon as a | |
143 | bluetooth controller is | |
144 | plugged in or becomes | |
145 | available at boot.</para> | |
146 | </listitem> | |
147 | </varlistentry> | |
bd3d19a4 LP |
148 | <varlistentry> |
149 | <term><filename>ctrl-alt-del.target</filename></term> | |
150 | <listitem> | |
151 | <para>systemd starts this | |
152 | target whenever | |
153 | Control+Alt+Del is pressed on | |
154 | the console. Usually this | |
155 | should be aliased (symlinked) | |
156 | to | |
157 | <filename>reboot.target</filename>.</para> | |
158 | </listitem> | |
159 | </varlistentry> | |
49dbfa7b LP |
160 | <varlistentry> |
161 | <term><filename>cryptsetup.target</filename></term> | |
162 | <listitem> | |
163 | <para>A target that pulls in | |
164 | setup services for all | |
165 | encrypted block | |
166 | devices.</para> | |
167 | </listitem> | |
168 | </varlistentry> | |
eeb7229c | 169 | <varlistentry> |
83bda358 | 170 | <term><filename>dbus.service</filename></term> |
eeb7229c LP |
171 | <listitem> |
172 | <para>A special unit for the | |
173 | D-Bus system bus. As soon as | |
174 | this service is fully started | |
175 | up systemd will connect to it | |
176 | and register its | |
177 | service.</para> | |
178 | </listitem> | |
179 | </varlistentry> | |
feb88c9f LP |
180 | <varlistentry> |
181 | <term><filename>dbus.socket</filename></term> | |
182 | <listitem> | |
183 | <para>A special unit for the | |
184 | D-Bus system bus socket. All | |
185 | units with | |
186 | <literal>Type=dbus</literal> | |
187 | automatically gain a | |
188 | dependency on this | |
189 | unit.</para> | |
190 | </listitem> | |
191 | </varlistentry> | |
bd3d19a4 LP |
192 | <varlistentry> |
193 | <term><filename>default.target</filename></term> | |
194 | <listitem> | |
195 | <para>The default unit systemd | |
196 | starts at bootup. Usually this | |
197 | should be aliased (symlinked) | |
198 | to | |
199 | <filename>multi-user.target</filename> | |
200 | or | |
201 | <filename>graphical.target</filename>.</para> | |
202 | <para>The default unit systemd | |
203 | starts at bootup can be | |
8f28cbcd | 204 | overridden with the |
2d87855a | 205 | <varname>systemd.unit=</varname> |
bd3d19a4 LP |
206 | kernel command line option.</para> |
207 | </listitem> | |
208 | </varlistentry> | |
1e287fe3 LP |
209 | <varlistentry> |
210 | <term><filename>display-manager.service</filename></term> | |
211 | <listitem> | |
212 | <para>The display manager | |
213 | service. Usually this should | |
214 | be aliased (symlinked) to | |
feb88c9f | 215 | <filename>gdm.service</filename> |
1e287fe3 LP |
216 | or a similar display manager |
217 | service.</para> | |
218 | <para>systemd automatically | |
219 | adds dependencies of type | |
220 | After for this target unit to | |
221 | all SysV init script service | |
af62c704 | 222 | units with a LSB header |
1e287fe3 LP |
223 | referring to the |
224 | <literal>$x-display-manager</literal> | |
225 | facility, for compatibility | |
226 | with Debian.</para> | |
227 | </listitem> | |
228 | </varlistentry> | |
9f235308 | 229 | <varlistentry> |
f057408c | 230 | <term><filename>emergency.target</filename></term> |
9f235308 | 231 | <listitem> |
f057408c | 232 | <para>A special target unit |
9f235308 LP |
233 | that starts an emergency |
234 | shell on the main | |
235 | console. This unit is supposed | |
236 | to be used with the kernel | |
237 | command line option | |
2d87855a | 238 | <varname>systemd.unit=</varname> |
9f235308 LP |
239 | and has otherwise little use. |
240 | </para> | |
241 | </listitem> | |
242 | </varlistentry> | |
feb88c9f LP |
243 | <varlistentry> |
244 | <term><filename>final.target</filename></term> | |
245 | <listitem> | |
246 | <para>A special target unit | |
247 | that is used during the | |
248 | shutdown logic and may be used | |
249 | to pull in late services after | |
250 | all normal services are | |
251 | already terminated and all | |
252 | mounts unmounted. | |
253 | </para> | |
254 | </listitem> | |
255 | </varlistentry> | |
49dbfa7b LP |
256 | <varlistentry> |
257 | <term><filename>getty.target</filename></term> | |
258 | <listitem> | |
259 | <para>A special target unit | |
260 | that pulls in all local TTY | |
261 | <filename>getty</filename> instances. | |
262 | </para> | |
263 | </listitem> | |
264 | </varlistentry> | |
bd3d19a4 LP |
265 | <varlistentry> |
266 | <term><filename>graphical.target</filename></term> | |
267 | <listitem> | |
268 | <para>A special target unit | |
269 | for setting up a graphical | |
270 | login screen. This pulls in | |
271 | <filename>multi-user.target</filename>.</para> | |
272 | ||
273 | <para>Units that are needed | |
274 | for graphical login shall add | |
275 | Wants dependencies for their | |
276 | unit to this unit (or | |
277 | <filename>multi-user.target</filename>) | |
278 | during installation.</para> | |
279 | </listitem> | |
280 | </varlistentry> | |
6edd7d0a LP |
281 | <varlistentry> |
282 | <term><filename>hibernate.target</filename></term> | |
283 | <listitem> | |
284 | <para>A special target unit | |
285 | for hibernating the | |
286 | system. This pulls in | |
287 | <filename>sleep.target</filename>.</para> | |
288 | </listitem> | |
289 | </varlistentry> | |
feb88c9f LP |
290 | <varlistentry> |
291 | <term><filename>http-daemon.target</filename></term> | |
292 | <listitem> | |
293 | <para>A target for pulling in | |
294 | an HTTP server if there is | |
295 | any.</para> | |
296 | <para>systemd automatically | |
297 | adds dependencies of type | |
298 | After for this target unit to | |
299 | all SysV init script service | |
300 | units with a LSB header | |
301 | referring to the | |
302 | <literal>$httpd</literal> | |
303 | facility.</para> | |
304 | </listitem> | |
305 | </varlistentry> | |
bd3d19a4 LP |
306 | <varlistentry> |
307 | <term><filename>halt.target</filename></term> | |
308 | <listitem> | |
309 | <para>A special target unit | |
310 | for shutting down and halting the system.</para> | |
311 | ||
312 | <para>Applications wanting to | |
313 | halt the system should start | |
314 | this unit.</para> | |
315 | </listitem> | |
316 | </varlistentry> | |
317 | <varlistentry> | |
318 | <term><filename>kbrequest.target</filename></term> | |
319 | <listitem> | |
320 | <para>systemd starts this | |
321 | target whenever Alt+ArrowUp is | |
322 | pressed on the console. This | |
323 | is a good candidate to be | |
324 | aliased (symlinked) to | |
325 | <filename>rescue.target</filename>.</para> | |
326 | </listitem> | |
327 | </varlistentry> | |
feb88c9f LP |
328 | <varlistentry> |
329 | <term><filename>kexec.target</filename></term> | |
330 | <listitem> | |
331 | <para>A special target unit | |
332 | for shutting down and rebooting the system via kexec.</para> | |
333 | ||
334 | <para>Applications wanting to | |
335 | reboot the system with kexec should start | |
336 | this unit.</para> | |
337 | </listitem> | |
338 | </varlistentry> | |
9f235308 LP |
339 | <varlistentry> |
340 | <term><filename>local-fs.target</filename></term> | |
341 | <listitem> | |
342 | <para>systemd automatically | |
343 | adds dependencies of type | |
344 | After to all mount units that | |
bd3d19a4 LP |
345 | refer to local mount points |
346 | for this target unit. In | |
347 | addition, systemd adds | |
348 | dependencies of type Wants to | |
349 | this target unit for those | |
350 | mounts listed in | |
9f235308 LP |
351 | <filename>/etc/fstab</filename> |
352 | that have the | |
0d624a78 LP |
353 | <option>auto</option> and |
354 | <option>comment=systemd.mount</option> | |
9f235308 LP |
355 | mount options set.</para> |
356 | ||
357 | <para>systemd automatically | |
358 | adds dependencies of type | |
bd3d19a4 LP |
359 | After for this target unit to |
360 | all SysV init script service | |
361 | units with an LSB header | |
362 | referring to the | |
9f235308 LP |
363 | <literal>$local_fs</literal> |
364 | facility.</para> | |
365 | </listitem> | |
366 | </varlistentry> | |
21e557ed LP |
367 | <varlistentry> |
368 | <term><filename>local-fs-pre.target</filename></term> | |
369 | <listitem> | |
370 | <para>This target unit is | |
371 | automatically ordered before | |
372 | all local mount points marked | |
373 | with <option>auto</option> | |
374 | (see above). It can be used to | |
375 | execute certain units before | |
376 | all local mounts.</para> | |
377 | </listitem> | |
378 | </varlistentry> | |
683f468c LP |
379 | <varlistentry> |
380 | <term><filename>mail-transfer-agent.target</filename></term> | |
381 | <listitem> | |
382 | <para>The mail transfer agent | |
383 | (MTA) service. Usually this | |
af62c704 | 384 | should pull-in all units |
683f468c LP |
385 | necessary for |
386 | sending/receiving mails on the | |
387 | local host.</para> | |
388 | ||
389 | <para>systemd automatically | |
390 | adds dependencies of type | |
391 | After for this target unit to | |
392 | all SysV init script service | |
393 | units with an LSB header | |
394 | referring to the | |
8f28cbcd | 395 | <literal>$mail-transfer-agent</literal> |
683f468c LP |
396 | or |
397 | <literal>$mail-transport-agent</literal> | |
398 | facilities, for compatibility | |
399 | with Debian.</para> | |
400 | </listitem> | |
401 | </varlistentry> | |
bd3d19a4 LP |
402 | <varlistentry> |
403 | <term><filename>multi-user.target</filename></term> | |
404 | <listitem> | |
405 | <para>A special target unit | |
406 | for setting up a multi-user | |
407 | system (non-graphical). This | |
408 | is pulled in by | |
409 | <filename>graphical.target</filename>.</para> | |
410 | ||
411 | <para>Units that are needed | |
412 | for a multi-user system shall | |
413 | add Wants dependencies to | |
414 | this unit for their unit during | |
415 | installation.</para> | |
416 | </listitem> | |
417 | </varlistentry> | |
9f235308 LP |
418 | <varlistentry> |
419 | <term><filename>network.target</filename></term> | |
420 | <listitem> | |
421 | <para>systemd automatically | |
422 | adds dependencies of type | |
bd3d19a4 LP |
423 | After for this target unit to |
424 | all SysV init script service | |
425 | units with an LSB header | |
426 | referring to the | |
9f235308 LP |
427 | <literal>$network</literal> |
428 | facility.</para> | |
429 | </listitem> | |
430 | </varlistentry> | |
431 | <varlistentry> | |
432 | <term><filename>nss-lookup.target</filename></term> | |
433 | <listitem> | |
082694b7 LP |
434 | <para>A target that should be |
435 | used as synchronization point | |
436 | for all host/network name | |
437 | service lookups. Note that | |
438 | this is independent of | |
439 | user/group name lookups for | |
440 | which | |
441 | <filename>nss-user-lookup.target</filename> | |
442 | should be used. systemd | |
443 | automatically adds | |
444 | dependencies of type After for | |
445 | this target unit to all SysV | |
446 | init script service units with | |
447 | an LSB header referring to the | |
9f235308 LP |
448 | <literal>$named</literal> |
449 | facility.</para> | |
450 | </listitem> | |
451 | </varlistentry> | |
082694b7 LP |
452 | <varlistentry> |
453 | <term><filename>nss-user-lookup.target</filename></term> | |
454 | <listitem> | |
455 | <para>A target that should be | |
456 | used as synchronization point | |
457 | for all user/group name | |
458 | service lookups. Note that | |
459 | this is independent of | |
460 | host/network name lookups for | |
461 | which | |
462 | <filename>nss-lookup.target</filename> | |
463 | should be used. </para> | |
464 | </listitem> | |
465 | </varlistentry> | |
bd3d19a4 LP |
466 | <varlistentry> |
467 | <term><filename>poweroff.target</filename></term> | |
468 | <listitem> | |
469 | <para>A special target unit | |
470 | for shutting down and powering off the system.</para> | |
471 | ||
472 | <para>Applications wanting to | |
473 | power off the system should start | |
474 | this unit.</para> | |
475 | ||
476 | <para><filename>runlevel0.target</filename> | |
477 | is an alias for this target | |
478 | unit, for compatibility with SysV.</para> | |
479 | </listitem> | |
480 | </varlistentry> | |
49dbfa7b LP |
481 | <varlistentry> |
482 | <term><filename>printer.target</filename></term> | |
483 | <listitem> | |
484 | <para>This target is started | |
485 | automatically as soon as a | |
486 | printer is plugged in or | |
487 | becomes available at | |
488 | boot.</para> | |
489 | </listitem> | |
490 | </varlistentry> | |
bd3d19a4 LP |
491 | <varlistentry> |
492 | <term><filename>reboot.target</filename></term> | |
493 | <listitem> | |
494 | <para>A special target unit | |
495 | for shutting down and rebooting the system.</para> | |
496 | ||
497 | <para>Applications wanting to | |
498 | reboot the system should start | |
499 | this unit.</para> | |
500 | ||
501 | <para><filename>runlevel6.target</filename> | |
502 | is an alias for this target | |
503 | unit, for compatibility with SysV.</para> | |
504 | </listitem> | |
505 | </varlistentry> | |
9f235308 LP |
506 | <varlistentry> |
507 | <term><filename>remote-fs.target</filename></term> | |
508 | <listitem> | |
bd3d19a4 LP |
509 | <para>Similar to |
510 | <filename>local-fs.target</filename>, | |
511 | but for remote mount | |
512 | points.</para> | |
513 | ||
9f235308 LP |
514 | <para>systemd automatically |
515 | adds dependencies of type | |
bd3d19a4 LP |
516 | After for this target unit to |
517 | all SysV init script service | |
518 | units with an LSB header | |
519 | referring to the | |
1e89ced1 | 520 | <literal>$remote_fs</literal> |
9f235308 LP |
521 | facility.</para> |
522 | </listitem> | |
523 | </varlistentry> | |
21e557ed LP |
524 | <varlistentry> |
525 | <term><filename>remote-fs-pre.target</filename></term> | |
526 | <listitem> | |
527 | <para>This target unit is | |
528 | automatically ordered before | |
529 | all remote mount points marked | |
530 | with <option>auto</option> | |
531 | (see above). It can be used to | |
532 | execute certain units before | |
533 | all remote mounts.</para> | |
534 | </listitem> | |
535 | </varlistentry> | |
bd3d19a4 LP |
536 | <varlistentry> |
537 | <term><filename>rescue.target</filename></term> | |
538 | <listitem> | |
539 | <para>A special target unit | |
540 | for setting up the base system | |
541 | and a rescue shell.</para> | |
542 | ||
543 | <para><filename>runlevel1.target</filename> | |
544 | is an alias for this target | |
545 | unit, for compatibility with SysV.</para> | |
546 | </listitem> | |
547 | </varlistentry> | |
9f235308 LP |
548 | <varlistentry> |
549 | <term><filename>rpcbind.target</filename></term> | |
550 | <listitem> | |
551 | <para>systemd automatically | |
552 | adds dependencies of type | |
bd3d19a4 LP |
553 | After for this target unit to |
554 | all SysV init script service | |
555 | units with an LSB header | |
556 | referring to the | |
9f235308 LP |
557 | <literal>$rpcbind</literal> |
558 | facility.</para> | |
559 | </listitem> | |
560 | </varlistentry> | |
bd3d19a4 LP |
561 | <varlistentry> |
562 | <term><filename>runlevel2.target</filename></term> | |
563 | <listitem> | |
564 | <para>This is a target that is | |
8f28cbcd | 565 | called whenever the SysV |
bd3d19a4 LP |
566 | compatibility code asks for |
567 | runlevel 2. It is a good idea | |
568 | to make this an alias for | |
569 | (i.e. symlink to) | |
570 | <filename>multi-user.target</filename>.</para> | |
571 | </listitem> | |
572 | </varlistentry> | |
573 | <varlistentry> | |
574 | <term><filename>runlevel3.target</filename></term> | |
575 | <listitem> | |
576 | <para>This is a target that is | |
8f28cbcd | 577 | called whenever the SysV |
bd3d19a4 LP |
578 | compatibility code asks for |
579 | runlevel 3. It is a good idea | |
580 | to make this an alias for | |
581 | (i.e. symlink to) | |
582 | <filename>multi-user.target</filename> | |
583 | or | |
584 | <filename>graphical.target</filename>.</para> | |
585 | </listitem> | |
586 | </varlistentry> | |
587 | <varlistentry> | |
588 | <term><filename>runlevel4.target</filename></term> | |
589 | <listitem> | |
590 | <para>This is a target that is | |
8f28cbcd | 591 | called whenever the SysV |
bd3d19a4 LP |
592 | compatibility code asks for |
593 | runlevel 4. It is a good idea | |
594 | to make this an alias for | |
595 | (i.e. symlink to) | |
596 | <filename>multi-user.target</filename> | |
597 | or | |
598 | <filename>graphical.target</filename>.</para> | |
599 | </listitem> | |
600 | </varlistentry> | |
601 | <varlistentry> | |
602 | <term><filename>runlevel5.target</filename></term> | |
603 | <listitem> | |
604 | <para>This is a target that is | |
8f28cbcd | 605 | called whenever the SysV |
bd3d19a4 LP |
606 | compatibility code asks for |
607 | runlevel 5. It is a good idea | |
608 | to make this an alias for | |
609 | (i.e. symlink to) | |
610 | <filename>multi-user.target</filename> | |
611 | or | |
612 | <filename>graphical.target</filename>.</para> | |
613 | </listitem> | |
614 | </varlistentry> | |
9f235308 LP |
615 | <varlistentry> |
616 | <term><filename>shutdown.target</filename></term> | |
617 | <listitem> | |
618 | <para>A special target unit | |
619 | that terminates the services | |
620 | on system shutdown.</para> | |
621 | ||
622 | <para>Services that shall be | |
623 | terminated on system shutdown | |
bd3d19a4 LP |
624 | shall add Conflicts |
625 | dependencies to this unit for | |
3b6fdb5b LP |
626 | their service unit, which is |
627 | implicitly done when | |
628 | <varname>DefaultDependencies=yes</varname> | |
629 | is set (the default).</para> | |
9f235308 LP |
630 | |
631 | <para>systemd automatically | |
632 | adds dependencies of type | |
633 | Conflicts to this target unit | |
bd3d19a4 LP |
634 | for all SysV init script |
635 | service units that shall be | |
636 | terminated in SysV runlevels 0 | |
637 | or 6.</para> | |
9f235308 LP |
638 | </listitem> |
639 | </varlistentry> | |
640 | <varlistentry> | |
641 | <term><filename>sigpwr.target</filename></term> | |
642 | <listitem> | |
643 | <para>A special target that is | |
644 | started when systemd receives | |
645 | the SIGPWR process signal, | |
646 | which is normally sent by the | |
bd3d19a4 | 647 | kernel or UPS daemons when |
9f235308 LP |
648 | power fails.</para> |
649 | </listitem> | |
650 | </varlistentry> | |
6edd7d0a LP |
651 | <varlistentry> |
652 | <term><filename>sleep.target</filename></term> | |
653 | <listitem> | |
654 | <para>A special target unit | |
655 | that is pulled in by | |
656 | <filename>suspend.target</filename> | |
657 | and | |
658 | <filename>hibernate.target</filename> | |
659 | and may be used to hook units | |
660 | into the sleep state | |
661 | logic.</para> | |
662 | </listitem> | |
663 | </varlistentry> | |
49dbfa7b LP |
664 | <varlistentry> |
665 | <term><filename>smartcard.target</filename></term> | |
666 | <listitem> | |
667 | <para>This target is started | |
668 | automatically as soon as a | |
669 | smartcard controller is | |
670 | plugged in or becomes | |
671 | available at boot.</para> | |
672 | </listitem> | |
673 | </varlistentry> | |
9f235308 LP |
674 | <varlistentry> |
675 | <term><filename>sockets.target</filename></term> | |
676 | <listitem> | |
677 | <para>A special target unit | |
678 | that sets up all service | |
679 | sockets.</para> | |
680 | ||
681 | <para>Services that can be | |
682 | socket-activated shall add | |
bd3d19a4 LP |
683 | Wants dependencies to this |
684 | unit for their socket unit | |
9f235308 LP |
685 | during installation.</para> |
686 | </listitem> | |
687 | </varlistentry> | |
49dbfa7b LP |
688 | <varlistentry> |
689 | <term><filename>sound.target</filename></term> | |
690 | <listitem> | |
691 | <para>This target is started | |
692 | automatically as soon as a | |
693 | sound card is plugged in or | |
694 | becomes available at | |
695 | boot.</para> | |
696 | </listitem> | |
697 | </varlistentry> | |
6edd7d0a LP |
698 | <varlistentry> |
699 | <term><filename>suspend.target</filename></term> | |
700 | <listitem> | |
701 | <para>A special target unit | |
702 | for suspending the | |
703 | system. This pulls in | |
704 | <filename>sleep.target</filename>.</para> | |
705 | </listitem> | |
706 | </varlistentry> | |
9f235308 LP |
707 | <varlistentry> |
708 | <term><filename>swap.target</filename></term> | |
709 | <listitem> | |
710 | <para>Similar to | |
711 | <filename>local-fs.target</filename>, but for swap | |
712 | partitions and swap | |
713 | files.</para> | |
714 | </listitem> | |
715 | </varlistentry> | |
f92a18f5 LP |
716 | <varlistentry> |
717 | <term><filename>sysinit.target</filename></term> | |
718 | <listitem> | |
719 | <para>A special target unit | |
720 | covering early boot-up scripts.</para> | |
721 | <para>systemd automatically | |
722 | adds dependencies of the types | |
723 | Wants and After for all | |
724 | SysV service units configured | |
725 | for runlevels that are not 0 | |
726 | to 6 to this target unit. | |
727 | This covers the special | |
728 | boot-up runlevels some | |
729 | distributions have, such as S | |
730 | or b.</para> | |
731 | </listitem> | |
732 | </varlistentry> | |
feb88c9f LP |
733 | <varlistentry> |
734 | <term><filename>syslog.service</filename></term> | |
735 | <listitem> | |
736 | <para>The syslog service if | |
737 | any. Implementations should | |
738 | create a symlink from the | |
739 | actual syslog implementation | |
740 | to this generic name for | |
741 | activating it.</para> | |
742 | </listitem> | |
743 | </varlistentry> | |
744 | <varlistentry> | |
745 | <term><filename>syslog.socket</filename></term> | |
746 | <listitem> | |
747 | <para>The socket unit where | |
748 | syslog implementations should | |
749 | listen on. All userspace log | |
750 | messages will be made | |
751 | available on this | |
752 | socket.</para> | |
753 | </listitem> | |
754 | </varlistentry> | |
62adf224 LP |
755 | <varlistentry> |
756 | <term><filename>syslog.target</filename></term> | |
757 | <listitem> | |
758 | <para>systemd automatically | |
759 | adds dependencies of type | |
760 | After for this target unit to | |
761 | all SysV init script service | |
762 | units with an LSB header | |
763 | referring to the | |
764 | <literal>$syslog</literal> | |
765 | facility.</para> | |
eeb7229c LP |
766 | </listitem> |
767 | </varlistentry> | |
f5ccf26d LP |
768 | <varlistentry> |
769 | <term><filename>system-update.target</filename></term> | |
770 | <listitem> | |
771 | <para>A special target unit | |
772 | that is used for off-line | |
773 | system updates. | |
774 | <citerefentry><refentrytitle>systemd-system-update-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry> | |
775 | will redirect the boot process | |
776 | to this target if | |
777 | <filename>/system-update</filename> | |
778 | exists. For more information | |
779 | see the <ulink | |
780 | url="http://freedesktop.org/wiki/Software/systemd/SystemUpdates">System | |
781 | Updates | |
782 | Specification</ulink>.</para> | |
783 | </listitem> | |
784 | </varlistentry> | |
db47cc2a JT |
785 | <varlistentry> |
786 | <term><filename>time-sync.target</filename></term> | |
787 | <listitem> | |
788 | <para>systemd automatically | |
789 | adds dependencies of type | |
790 | After for this target unit to | |
791 | all SysV init script service | |
792 | units with an LSB header | |
793 | referring to the | |
794 | <literal>$time</literal> | |
795 | facility.</para> | |
796 | </listitem> | |
797 | </varlistentry> | |
3b6fdb5b LP |
798 | <varlistentry> |
799 | <term><filename>umount.target</filename></term> | |
800 | <listitem> | |
801 | <para>A special target unit | |
802 | that umounts all mount and | |
803 | automount points on system | |
804 | shutdown.</para> | |
805 | ||
806 | <para>Mounts that shall be | |
807 | unmounted on system shutdown | |
808 | shall add Conflicts | |
809 | dependencies to this unit for | |
810 | their mount unit, which is | |
811 | implicitly done when | |
812 | <varname>DefaultDependencies=yes</varname> | |
813 | is set (the default).</para> | |
814 | </listitem> | |
815 | </varlistentry> | |
f5ccf26d | 816 | |
9f235308 LP |
817 | </variablelist> |
818 | </refsect1> | |
819 | ||
820 | <refsect1> | |
af2d49f7 | 821 | <title>Special User Units</title> |
9f235308 | 822 | |
af2d49f7 | 823 | <para>When systemd runs as a user instance, the |
9f235308 LP |
824 | following special units are available, which have |
825 | similar definitions as their system counterparts: | |
bd3d19a4 | 826 | <filename>default.target</filename>, |
9f235308 | 827 | <filename>shutdown.target</filename>, |
feb88c9f | 828 | <filename>sockets.target</filename></para> |
a1b256b0 LP |
829 | |
830 | <para>In addition the following special unit is | |
831 | understood only when systemd runs as service instance:</para> | |
832 | ||
833 | <variablelist> | |
834 | <varlistentry> | |
0e0320e0 | 835 | <term><filename>exit.target</filename></term> |
a1b256b0 LP |
836 | <listitem> |
837 | <para>A special service unit | |
838 | for shutting down the | |
af2d49f7 | 839 | user service manager.</para> |
a1b256b0 LP |
840 | |
841 | <para>Applications wanting to | |
af2d49f7 LP |
842 | terminate the user service |
843 | manager should start this | |
844 | unit. If systemd receives | |
845 | SIGTERM or SIGINT when running | |
846 | as user service daemon it will | |
847 | start this unit.</para> | |
a1b256b0 LP |
848 | |
849 | <para>Normally, this pulls in | |
850 | <filename>shutdown.target</filename> | |
851 | which in turn should be | |
852 | conflicted by all units that | |
853 | want to be shut down on | |
af2d49f7 | 854 | user service manager exit.</para> |
a1b256b0 LP |
855 | </listitem> |
856 | </varlistentry> | |
857 | </variablelist> | |
9f235308 LP |
858 | </refsect1> |
859 | ||
860 | <refsect1> | |
861 | <title>See Also</title> | |
862 | <para> | |
feb88c9f | 863 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, |
5dc50792 LP |
864 | <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>, |
865 | <citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
866 | <citerefentry><refentrytitle>systemd.socket</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
013d8a39 LP |
867 | <citerefentry><refentrytitle>systemd.target</refentrytitle><manvolnum>5</manvolnum></citerefentry>, |
868 | <citerefentry><refentrytitle>bootup</refentrytitle><manvolnum>7</manvolnum></citerefentry> | |
9f235308 LP |
869 | </para> |
870 | </refsect1> | |
871 | ||
872 | </refentry> |