projects / thirdparty / systemd.git / blame
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|---|---|---|
| 9f235308 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 | |
| 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>, |
| 9542239e | 55 | <filename>cryptsetup-pre.target</filename>, |
| 83bda358 | 56 | <filename>dbus.service</filename>, |
| feb88c9f | 57 | <filename>dbus.socket</filename>, |
| 9f2c5942 | 58 | <filename>default.target</filename>, |
| 1e287fe3 | 59 | <filename>display-manager.service</filename>, |
| f057408c | 60 | <filename>emergency.target</filename>, |
| 0e0320e0 LP |
61 | <filename>exit.target</filename>, |
| 62 | <filename>final.target</filename>, | |
| 49dbfa7b | 63 | <filename>getty.target</filename>, |
| 9f2c5942 | 64 | <filename>graphical.target</filename>, |
| 669b04a4 | 65 | <filename>halt.target</filename>, |
| 6edd7d0a | 66 | <filename>hibernate.target</filename>, |
| 6524990f | 67 | <filename>hybrid-sleep.target</filename>, |
| 700e07ff | 68 | <filename>initrd-fs.target</filename>, |
| 9f2c5942 | 69 | <filename>kbrequest.target</filename>, |
| feb88c9f | 70 | <filename>kexec.target</filename>, |
| 9f2c5942 | 71 | <filename>local-fs.target</filename>, |
| 21e557ed | 72 | <filename>local-fs-pre.target</filename>, |
| 9f2c5942 LP |
73 | <filename>multi-user.target</filename>, |
| 74 | <filename>network.target</filename>, | |
| 0c17fbce | 75 | <filename>network-online.target</filename>, |
| a4a878d0 | 76 | <filename>network-pre.target</filename>, |
| 9f2c5942 | 77 | <filename>nss-lookup.target</filename>, |
| 49dbfa7b | 78 | <filename>nss-user-lookup.target</filename>, |
| e3d84721 | 79 | <filename>paths.target</filename>, |
| 9f2c5942 | 80 | <filename>poweroff.target</filename>, |
| 49dbfa7b | 81 | <filename>printer.target</filename>, |
| 9f2c5942 LP |
82 | <filename>reboot.target</filename>, |
| 83 | <filename>remote-fs.target</filename>, | |
| 21e557ed | 84 | <filename>remote-fs-pre.target</filename>, |
| 9f2c5942 | 85 | <filename>rescue.target</filename>, |
| 9e5f0f92 | 86 | <filename>initrd-root-fs.target</filename>, |
| 9f2c5942 | 87 | <filename>rpcbind.target</filename>, |
| 9f2c5942 LP |
88 | <filename>runlevel2.target</filename>, |
| 89 | <filename>runlevel3.target</filename>, | |
| 90 | <filename>runlevel4.target</filename>, | |
| 91 | <filename>runlevel5.target</filename>, | |
| 9f2c5942 LP |
92 | <filename>shutdown.target</filename>, |
| 93 | <filename>sigpwr.target</filename>, | |
| 6edd7d0a | 94 | <filename>sleep.target</filename>, |
| 49dbfa7b | 95 | <filename>smartcard.target</filename>, |
| 9f2c5942 | 96 | <filename>sockets.target</filename>, |
| 49dbfa7b | 97 | <filename>sound.target</filename>, |
| 6edd7d0a | 98 | <filename>suspend.target</filename>, |
| 9f2c5942 | 99 | <filename>swap.target</filename>, |
| f92a18f5 | 100 | <filename>sysinit.target</filename>, |
| feb88c9f | 101 | <filename>syslog.socket</filename>, |
| f5ccf26d | 102 | <filename>system-update.target</filename>, |
| db47cc2a | 103 | <filename>time-sync.target</filename>, |
| e3d84721 | 104 | <filename>timers.target</filename>, |
| fade1ec6 ZJS |
105 | <filename>umount.target</filename>, |
| 106 | <filename>-.slice</filename>, | |
| 107 | <filename>system.slice</filename>, | |
| 108 | <filename>user.slice</filename>, | |
| 109 | <filename>machine.slice</filename></para> | |
| 9f235308 LP |
110 | </refsynopsisdiv> |
| 111 | ||
| 112 | <refsect1> | |
| 113 | <title>Description</title> | |
| 114 | ||
| 115 | <para>A few units are treated specially by | |
| 116 | systemd. They have special internal semantics and | |
| 117 | cannot be renamed.</para> | |
| 118 | </refsect1> | |
| 119 | ||
| 120 | <refsect1> | |
| 121 | <title>Special System Units</title> | |
| 122 | ||
| 123 | <variablelist> | |
| bd3d19a4 LP |
124 | <varlistentry> |
| 125 | <term><filename>basic.target</filename></term> | |
| 126 | <listitem> | |
| 127 | <para>A special target unit | |
| e3d84721 | 128 | covering basic boot-up.</para> |
| bd3d19a4 LP |
129 | <para>systemd automatically |
| 130 | adds dependencies of the types | |
| e3d84721 LP |
131 | <varname>Requires=</varname> |
| 132 | and <varname>After=</varname> | |
| 133 | for this target unit to all | |
| 134 | services (except for those | |
| 135 | with | |
| 136 | <varname>DefaultDependencies=no</varname>).</para> | |
| 137 | ||
| 138 | <para>Usually this should | |
| 139 | pull-in all mount points, swap | |
| 140 | devices, sockets, timers, and | |
| 141 | path units and other basic | |
| f92a18f5 | 142 | initialization necessary for |
| e3d84721 LP |
143 | general purpose |
| 144 | daemons.</para> | |
| bd3d19a4 LP |
145 | </listitem> |
| 146 | </varlistentry> | |
| 147 | <varlistentry> | |
| 148 | <term><filename>ctrl-alt-del.target</filename></term> | |
| 149 | <listitem> | |
| 150 | <para>systemd starts this | |
| 151 | target whenever | |
| 152 | Control+Alt+Del is pressed on | |
| 153 | the console. Usually this | |
| 154 | should be aliased (symlinked) | |
| 155 | to | |
| 156 | <filename>reboot.target</filename>.</para> | |
| 157 | </listitem> | |
| 158 | </varlistentry> | |
| 49dbfa7b LP |
159 | <varlistentry> |
| 160 | <term><filename>cryptsetup.target</filename></term> | |
| 161 | <listitem> | |
| 162 | <para>A target that pulls in | |
| 163 | setup services for all | |
| 164 | encrypted block | |
| 165 | devices.</para> | |
| 166 | </listitem> | |
| 167 | </varlistentry> | |
| eeb7229c | 168 | <varlistentry> |
| 83bda358 | 169 | <term><filename>dbus.service</filename></term> |
| eeb7229c LP |
170 | <listitem> |
| 171 | <para>A special unit for the | |
| e3d84721 | 172 | D-Bus bus daemon. As soon as |
| eeb7229c LP |
173 | this service is fully started |
| 174 | up systemd will connect to it | |
| 175 | and register its | |
| 176 | service.</para> | |
| 177 | </listitem> | |
| 178 | </varlistentry> | |
| feb88c9f LP |
179 | <varlistentry> |
| 180 | <term><filename>dbus.socket</filename></term> | |
| 181 | <listitem> | |
| 182 | <para>A special unit for the | |
| 183 | D-Bus system bus socket. All | |
| 184 | units with | |
| e3d84721 | 185 | <varname>Type=dbus</varname> |
| feb88c9f LP |
186 | automatically gain a |
| 187 | dependency on this | |
| 188 | unit.</para> | |
| 189 | </listitem> | |
| 190 | </varlistentry> | |
| bd3d19a4 LP |
191 | <varlistentry> |
| 192 | <term><filename>default.target</filename></term> | |
| 193 | <listitem> | |
| 194 | <para>The default unit systemd | |
| 195 | starts at bootup. Usually this | |
| 196 | should be aliased (symlinked) | |
| 197 | to | |
| 198 | <filename>multi-user.target</filename> | |
| 199 | or | |
| 200 | <filename>graphical.target</filename>.</para> | |
| e3d84721 | 201 | |
| bd3d19a4 LP |
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> | |
| 1e287fe3 LP |
218 | </listitem> |
| 219 | </varlistentry> | |
| 9f235308 | 220 | <varlistentry> |
| f057408c | 221 | <term><filename>emergency.target</filename></term> |
| 9f235308 | 222 | <listitem> |
| f057408c | 223 | <para>A special target unit |
| 9f235308 LP |
224 | that starts an emergency |
| 225 | shell on the main | |
| 226 | console. This unit is supposed | |
| 227 | to be used with the kernel | |
| 228 | command line option | |
| 2d87855a | 229 | <varname>systemd.unit=</varname> |
| 9f235308 LP |
230 | and has otherwise little use. |
| 231 | </para> | |
| 232 | </listitem> | |
| 233 | </varlistentry> | |
| feb88c9f LP |
234 | <varlistentry> |
| 235 | <term><filename>final.target</filename></term> | |
| 236 | <listitem> | |
| 237 | <para>A special target unit | |
| 238 | that is used during the | |
| 239 | shutdown logic and may be used | |
| 240 | to pull in late services after | |
| 241 | all normal services are | |
| 242 | already terminated and all | |
| 243 | mounts unmounted. | |
| 244 | </para> | |
| 245 | </listitem> | |
| 246 | </varlistentry> | |
| 49dbfa7b LP |
247 | <varlistentry> |
| 248 | <term><filename>getty.target</filename></term> | |
| 249 | <listitem> | |
| 250 | <para>A special target unit | |
| e3d84721 LP |
251 | that pulls in statically |
| 252 | configured local TTY | |
| 253 | <filename>getty</filename> | |
| 254 | instances. | |
| 49dbfa7b LP |
255 | </para> |
| 256 | </listitem> | |
| 257 | </varlistentry> | |
| bd3d19a4 LP |
258 | <varlistentry> |
| 259 | <term><filename>graphical.target</filename></term> | |
| 260 | <listitem> | |
| 261 | <para>A special target unit | |
| 262 | for setting up a graphical | |
| 263 | login screen. This pulls in | |
| 264 | <filename>multi-user.target</filename>.</para> | |
| 265 | ||
| 266 | <para>Units that are needed | |
| e3d84721 LP |
267 | for graphical logins shall add |
| 268 | <varname>Wants=</varname> | |
| 269 | dependencies for their unit to | |
| 270 | this unit (or | |
| bd3d19a4 | 271 | <filename>multi-user.target</filename>) |
| e3d84721 LP |
272 | during installation. This is |
| 273 | best configured via | |
| 274 | <varname>WantedBy=graphical.target</varname> | |
| 275 | in the unit's | |
| 276 | <literal>[Install]</literal> | |
| 277 | section.</para> | |
| bd3d19a4 LP |
278 | </listitem> |
| 279 | </varlistentry> | |
| 6edd7d0a LP |
280 | <varlistentry> |
| 281 | <term><filename>hibernate.target</filename></term> | |
| 282 | <listitem> | |
| 283 | <para>A special target unit | |
| 284 | for hibernating the | |
| 285 | system. This pulls in | |
| 286 | <filename>sleep.target</filename>.</para> | |
| 287 | </listitem> | |
| 288 | </varlistentry> | |
| 6524990f LP |
289 | <varlistentry> |
| 290 | <term><filename>hybrid-sleep.target</filename></term> | |
| 291 | <listitem> | |
| 292 | <para>A special target unit | |
| 293 | for hibernating and suspending the | |
| 294 | system at the same time. This pulls in | |
| 295 | <filename>sleep.target</filename>.</para> | |
| 296 | </listitem> | |
| 297 | </varlistentry> | |
| bd3d19a4 LP |
298 | <varlistentry> |
| 299 | <term><filename>halt.target</filename></term> | |
| 300 | <listitem> | |
| 301 | <para>A special target unit | |
| e3d84721 LP |
302 | for shutting down and halting |
| 303 | the system. Note that this | |
| 304 | target is distinct from | |
| 305 | <filename>poweroff.target</filename> | |
| 306 | in that it generally really | |
| 307 | just halts the system rather | |
| 308 | than powering it down.</para> | |
| bd3d19a4 LP |
309 | |
| 310 | <para>Applications wanting to | |
| 311 | halt the system should start | |
| 312 | this unit.</para> | |
| 313 | </listitem> | |
| 314 | </varlistentry> | |
| 700e07ff HH |
315 | <varlistentry> |
| 316 | <term><filename>initrd-fs.target</filename></term> | |
| 317 | <listitem> | |
| e3d84721 LP |
318 | <para><citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>3</manvolnum></citerefentry> |
| 319 | automatically adds | |
| 320 | dependencies of type | |
| 321 | <varname>Before=</varname> to | |
| 322 | <filename>sysroot-usr.mount</filename> | |
| 5e9dfd2e | 323 | and all mount points found in |
| 700e07ff | 324 | <filename>/etc/fstab</filename> |
| ee43f49b | 325 | that have |
| 700e07ff | 326 | <option>x-initrd.mount</option> |
| ee43f49b ZJS |
327 | and not have <option>noauto</option> |
| 328 | mount options set.</para> | |
| 700e07ff HH |
329 | </listitem> |
| 330 | </varlistentry> | |
| bd3d19a4 LP |
331 | <varlistentry> |
| 332 | <term><filename>kbrequest.target</filename></term> | |
| 333 | <listitem> | |
| 334 | <para>systemd starts this | |
| 335 | target whenever Alt+ArrowUp is | |
| 336 | pressed on the console. This | |
| 337 | is a good candidate to be | |
| 338 | aliased (symlinked) to | |
| 339 | <filename>rescue.target</filename>.</para> | |
| 340 | </listitem> | |
| 341 | </varlistentry> | |
| feb88c9f LP |
342 | <varlistentry> |
| 343 | <term><filename>kexec.target</filename></term> | |
| 344 | <listitem> | |
| 345 | <para>A special target unit | |
| 346 | for shutting down and rebooting the system via kexec.</para> | |
| 347 | ||
| 348 | <para>Applications wanting to | |
| 349 | reboot the system with kexec should start | |
| 350 | this unit.</para> | |
| 351 | </listitem> | |
| 352 | </varlistentry> | |
| 9f235308 LP |
353 | <varlistentry> |
| 354 | <term><filename>local-fs.target</filename></term> | |
| 355 | <listitem> | |
| e3d84721 LP |
356 | <para><citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>3</manvolnum></citerefentry> |
| 357 | automatically adds | |
| 358 | dependencies of type | |
| 359 | <varname>Before=</varname> to | |
| 360 | all mount units that refer to | |
| 361 | local mount points for this | |
| 362 | target unit. In addition, it | |
| 9f235308 | 363 | adds dependencies of type |
| e3d84721 | 364 | <varname>Wants=</varname> to |
| bd3d19a4 LP |
365 | this target unit for those |
| 366 | mounts listed in | |
| 9f235308 LP |
367 | <filename>/etc/fstab</filename> |
| 368 | that have the | |
| e3d84721 LP |
369 | <option>auto</option> mount |
| 370 | option set.</para> | |
| 9f235308 LP |
371 | </listitem> |
| 372 | </varlistentry> | |
| bd3d19a4 LP |
373 | <varlistentry> |
| 374 | <term><filename>multi-user.target</filename></term> | |
| 375 | <listitem> | |
| 376 | <para>A special target unit | |
| 377 | for setting up a multi-user | |
| 378 | system (non-graphical). This | |
| 379 | is pulled in by | |
| 380 | <filename>graphical.target</filename>.</para> | |
| 381 | ||
| 382 | <para>Units that are needed | |
| 383 | for a multi-user system shall | |
| e3d84721 LP |
384 | add <varname>Wants=</varname> |
| 385 | dependencies for their unit to | |
| 386 | this unit during | |
| 387 | installation. This is best | |
| 388 | configured via | |
| 32ce5ae2 | 389 | <varname>WantedBy=multi-user.target</varname> |
| e3d84721 LP |
390 | in the unit's |
| 391 | <literal>[Install]</literal> | |
| 392 | section.</para> | |
| bd3d19a4 LP |
393 | </listitem> |
| 394 | </varlistentry> | |
| 0c17fbce LP |
395 | <varlistentry> |
| 396 | <term><filename>network-online.target</filename></term> | |
| 397 | <listitem> | |
| 398 | <para>Units that strictly | |
| 399 | require a configured network | |
| 400 | connection should pull in | |
| 401 | <filename>network-online.target</filename> | |
| 402 | (via a | |
| 403 | <varname>Wants=</varname> type | |
| 404 | dependency) and order | |
| 405 | themselves after it. This | |
| 406 | target unit is intended to | |
| 407 | pull in a service that delays | |
| 408 | further execution until the | |
| 409 | network is sufficiently set | |
| 410 | up. What precisely this | |
| 411 | requires is left to the | |
| 412 | implementation of the network | |
| 413 | managing service.</para> | |
| 414 | ||
| 415 | <para>Note the distinction | |
| 416 | between this unit and | |
| 417 | <filename>network.target</filename>. This | |
| 418 | unit is an active unit | |
| 419 | (i.e. pulled in by the | |
| 420 | consumer rather than the | |
| 421 | provider of this | |
| 422 | functionality) and pulls in a | |
| 423 | service which possibly adds | |
| 424 | substantial delays to further | |
| 425 | execution. In contrast, | |
| 426 | <filename>network.target</filename> | |
| 427 | is a passive unit (i.e. pulled | |
| 428 | in by the provider of the | |
| 429 | functionality, rather than the | |
| 430 | consumer) that usually does | |
| 431 | not delay execution | |
| 432 | much. Usually, | |
| 433 | <filename>network.target</filename> | |
| 434 | is part of the boot of most | |
| 435 | systems, while | |
| 436 | <filename>network-online.target</filename> | |
| 437 | is not, except when at least | |
| 438 | one unit requires it. Also see | |
| 439 | <ulink | |
| 440 | url="http://www.freedesktop.org/wiki/Software/systemd/NetworkTarget">Running | |
| 441 | Services After the Network is | |
| 442 | up</ulink> for more | |
| 443 | information.</para> | |
| 444 | ||
| 445 | <para>All mount units for | |
| 446 | remote network file systems | |
| 447 | automatically pull in this | |
| 448 | unit, and order themselves | |
| 449 | after it. Note that networking | |
| 450 | daemons that simply provide | |
| 451 | functionality to other hosts | |
| 6b4991cf | 452 | generally do not need to pull |
| 0c17fbce LP |
453 | this in.</para> |
| 454 | </listitem> | |
| 455 | </varlistentry> | |
| e3d84721 LP |
456 | <varlistentry> |
| 457 | <term><filename>paths.target</filename></term> | |
| 458 | <listitem> | |
| 459 | <para>A special target unit | |
| 460 | that sets up all path units | |
| 461 | (see | |
| 462 | <citerefentry><refentrytitle>systemd.path</refentrytitle><manvolnum>5</manvolnum></citerefentry> | |
| 463 | for details) that shall be | |
| 464 | active after boot.</para> | |
| 465 | ||
| 466 | <para>It is recommended that | |
| 467 | path units installed by | |
| 468 | applications get pulled in via | |
| 469 | <varname>Wants=</varname> | |
| 470 | dependencies from this | |
| 471 | unit. This is best configured | |
| 472 | via a | |
| 473 | <varname>WantedBy=paths.target</varname> | |
| 474 | in the path unit's | |
| 475 | <literal>[Install]</literal> | |
| 476 | section.</para> | |
| 477 | </listitem> | |
| 478 | </varlistentry> | |
| bd3d19a4 LP |
479 | <varlistentry> |
| 480 | <term><filename>poweroff.target</filename></term> | |
| 481 | <listitem> | |
| 482 | <para>A special target unit | |
| 483 | for shutting down and powering off the system.</para> | |
| 484 | ||
| 485 | <para>Applications wanting to | |
| 486 | power off the system should start | |
| 487 | this unit.</para> | |
| 488 | ||
| 489 | <para><filename>runlevel0.target</filename> | |
| 490 | is an alias for this target | |
| 491 | unit, for compatibility with SysV.</para> | |
| 492 | </listitem> | |
| 493 | </varlistentry> | |
| 494 | <varlistentry> | |
| 495 | <term><filename>reboot.target</filename></term> | |
| 496 | <listitem> | |
| 497 | <para>A special target unit | |
| 498 | for shutting down and rebooting the system.</para> | |
| 499 | ||
| 500 | <para>Applications wanting to | |
| 501 | reboot the system should start | |
| 502 | this unit.</para> | |
| 503 | ||
| 504 | <para><filename>runlevel6.target</filename> | |
| 505 | is an alias for this target | |
| 506 | unit, for compatibility with SysV.</para> | |
| 507 | </listitem> | |
| 508 | </varlistentry> | |
| 9f235308 LP |
509 | <varlistentry> |
| 510 | <term><filename>remote-fs.target</filename></term> | |
| 511 | <listitem> | |
| bd3d19a4 LP |
512 | <para>Similar to |
| 513 | <filename>local-fs.target</filename>, | |
| 514 | but for remote mount | |
| 515 | points.</para> | |
| 516 | ||
| 9f235308 LP |
517 | <para>systemd automatically |
| 518 | adds dependencies of type | |
| e3d84721 LP |
519 | <varname>After=</varname> for |
| 520 | this target unit to all SysV | |
| 521 | init script service units with | |
| 522 | an LSB header referring to the | |
| 1e89ced1 | 523 | <literal>$remote_fs</literal> |
| 9f235308 LP |
524 | facility.</para> |
| 525 | </listitem> | |
| 526 | </varlistentry> | |
| bd3d19a4 LP |
527 | <varlistentry> |
| 528 | <term><filename>rescue.target</filename></term> | |
| 529 | <listitem> | |
| 530 | <para>A special target unit | |
| 531 | for setting up the base system | |
| 532 | and a rescue shell.</para> | |
| 533 | ||
| 534 | <para><filename>runlevel1.target</filename> | |
| 535 | is an alias for this target | |
| 536 | unit, for compatibility with SysV.</para> | |
| 537 | </listitem> | |
| 538 | </varlistentry> | |
| 700e07ff | 539 | <varlistentry> |
| 9e5f0f92 | 540 | <term><filename>initrd-root-fs.target</filename></term> |
| 700e07ff | 541 | <listitem> |
| e3d84721 LP |
542 | <para><citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>3</manvolnum></citerefentry> |
| 543 | automatically adds | |
| 544 | dependencies of type | |
| 545 | <varname>Before=</varname> to | |
| 546 | the | |
| 547 | <filename>sysroot.mount</filename> | |
| 548 | unit, which is generated from | |
| 549 | the kernel command line. | |
| 700e07ff HH |
550 | </para> |
| 551 | </listitem> | |
| 552 | </varlistentry> | |
| bd3d19a4 LP |
553 | <varlistentry> |
| 554 | <term><filename>runlevel2.target</filename></term> | |
| bd3d19a4 | 555 | <term><filename>runlevel3.target</filename></term> |
| bd3d19a4 | 556 | <term><filename>runlevel4.target</filename></term> |
| bd3d19a4 LP |
557 | <term><filename>runlevel5.target</filename></term> |
| 558 | <listitem> | |
| 669b04a4 LP |
559 | <para>These are targets that |
| 560 | are called whenever the SysV | |
| bd3d19a4 | 561 | compatibility code asks for |
| 669b04a4 LP |
562 | runlevel 2, 3, 4, 5, |
| 563 | respectively. It is a good | |
| 564 | idea to make this an alias for | |
| bd3d19a4 LP |
565 | (i.e. symlink to) |
| 566 | <filename>multi-user.target</filename> | |
| 669b04a4 LP |
567 | (for runlevel 2) or |
| 568 | <filename>graphical.target</filename> | |
| 569 | (the others).</para> | |
| bd3d19a4 LP |
570 | </listitem> |
| 571 | </varlistentry> | |
| 9f235308 LP |
572 | <varlistentry> |
| 573 | <term><filename>shutdown.target</filename></term> | |
| 574 | <listitem> | |
| 575 | <para>A special target unit | |
| 576 | that terminates the services | |
| 577 | on system shutdown.</para> | |
| 578 | ||
| 579 | <para>Services that shall be | |
| 580 | terminated on system shutdown | |
| e3d84721 | 581 | shall add <varname>Conflicts=</varname> |
| bd3d19a4 | 582 | dependencies to this unit for |
| 3b6fdb5b LP |
583 | their service unit, which is |
| 584 | implicitly done when | |
| 585 | <varname>DefaultDependencies=yes</varname> | |
| 586 | is set (the default).</para> | |
| 9f235308 LP |
587 | </listitem> |
| 588 | </varlistentry> | |
| 589 | <varlistentry> | |
| 590 | <term><filename>sigpwr.target</filename></term> | |
| 591 | <listitem> | |
| 592 | <para>A special target that is | |
| 593 | started when systemd receives | |
| 594 | the SIGPWR process signal, | |
| 595 | which is normally sent by the | |
| bd3d19a4 | 596 | kernel or UPS daemons when |
| 9f235308 LP |
597 | power fails.</para> |
| 598 | </listitem> | |
| 599 | </varlistentry> | |
| 6edd7d0a LP |
600 | <varlistentry> |
| 601 | <term><filename>sleep.target</filename></term> | |
| 602 | <listitem> | |
| 603 | <para>A special target unit | |
| 604 | that is pulled in by | |
| 6524990f | 605 | <filename>suspend.target</filename>, |
| e3d84721 LP |
606 | <filename>hibernate.target</filename> |
| 607 | and | |
| 608 | <filename>hybrid-sleep.target</filename> | |
| 6edd7d0a LP |
609 | and may be used to hook units |
| 610 | into the sleep state | |
| 611 | logic.</para> | |
| 612 | </listitem> | |
| 613 | </varlistentry> | |
| 9f235308 LP |
614 | <varlistentry> |
| 615 | <term><filename>sockets.target</filename></term> | |
| 616 | <listitem> | |
| 617 | <para>A special target unit | |
| e3d84721 LP |
618 | that sets up all socket |
| 619 | units.(see | |
| 620 | <citerefentry><refentrytitle>systemd.socket</refentrytitle><manvolnum>5</manvolnum></citerefentry> | |
| 621 | for details) that shall be | |
| 622 | active after boot.</para> | |
| 9f235308 LP |
623 | |
| 624 | <para>Services that can be | |
| 625 | socket-activated shall add | |
| e3d84721 LP |
626 | <varname>Wants=</varname> |
| 627 | dependencies to this unit for | |
| 628 | their socket unit during | |
| 629 | installation. This is best | |
| 630 | configured via a | |
| 631 | <varname>WantedBy=sockets.target</varname> | |
| 632 | in the socket unit's | |
| 633 | <literal>[Install]</literal> | |
| 634 | section.</para> | |
| 9f235308 LP |
635 | </listitem> |
| 636 | </varlistentry> | |
| 6edd7d0a LP |
637 | <varlistentry> |
| 638 | <term><filename>suspend.target</filename></term> | |
| 639 | <listitem> | |
| 640 | <para>A special target unit | |
| 641 | for suspending the | |
| 642 | system. This pulls in | |
| 643 | <filename>sleep.target</filename>.</para> | |
| 644 | </listitem> | |
| 645 | </varlistentry> | |
| 9f235308 LP |
646 | <varlistentry> |
| 647 | <term><filename>swap.target</filename></term> | |
| 648 | <listitem> | |
| 649 | <para>Similar to | |
| 650 | <filename>local-fs.target</filename>, but for swap | |
| 651 | partitions and swap | |
| 652 | files.</para> | |
| 653 | </listitem> | |
| 654 | </varlistentry> | |
| f92a18f5 LP |
655 | <varlistentry> |
| 656 | <term><filename>sysinit.target</filename></term> | |
| 657 | <listitem> | |
| 658 | <para>A special target unit | |
| 659 | covering early boot-up scripts.</para> | |
| f92a18f5 LP |
660 | </listitem> |
| 661 | </varlistentry> | |
| feb88c9f LP |
662 | <varlistentry> |
| 663 | <term><filename>syslog.socket</filename></term> | |
| 664 | <listitem> | |
| f848f8d8 | 665 | <para>The socket unit |
| feb88c9f LP |
666 | syslog implementations should |
| 667 | listen on. All userspace log | |
| 668 | messages will be made | |
| 99800333 LP |
669 | available on this socket. For |
| 670 | more information about syslog | |
| 671 | integration, please consult | |
| 672 | the <ulink | |
| 673 | url="http://www.freedesktop.org/wiki/Software/systemd/syslog">Syslog | |
| 674 | Interface</ulink> | |
| 675 | document.</para> | |
| feb88c9f LP |
676 | </listitem> |
| 677 | </varlistentry> | |
| f5ccf26d LP |
678 | <varlistentry> |
| 679 | <term><filename>system-update.target</filename></term> | |
| 680 | <listitem> | |
| 681 | <para>A special target unit | |
| 682 | that is used for off-line | |
| 683 | system updates. | |
| 684 | <citerefentry><refentrytitle>systemd-system-update-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry> | |
| 685 | will redirect the boot process | |
| 686 | to this target if | |
| 687 | <filename>/system-update</filename> | |
| 688 | exists. For more information | |
| 689 | see the <ulink | |
| 690 | url="http://freedesktop.org/wiki/Software/systemd/SystemUpdates">System | |
| 691 | Updates | |
| 692 | Specification</ulink>.</para> | |
| 693 | </listitem> | |
| 694 | </varlistentry> | |
| e3d84721 LP |
695 | <varlistentry> |
| 696 | <term><filename>timers.target</filename></term> | |
| 697 | <listitem> | |
| 698 | <para>A special target unit | |
| 699 | that sets up all timer | |
| 700 | units (see | |
| 701 | <citerefentry><refentrytitle>systemd.timer</refentrytitle><manvolnum>5</manvolnum></citerefentry> | |
| 702 | for details) that shall be | |
| 703 | active after boot.</para> | |
| 704 | ||
| 705 | <para>It is recommended that | |
| 706 | timer units installed by | |
| 707 | applications get pulled in via | |
| 708 | <varname>Wants=</varname> | |
| 709 | dependencies from this | |
| 710 | unit. This is best configured | |
| 711 | via | |
| 712 | <varname>WantedBy=timers.target</varname> | |
| 713 | in the timer unit's | |
| 714 | <literal>[Install]</literal> | |
| 715 | section.</para> | |
| 716 | </listitem> | |
| 717 | </varlistentry> | |
| 3b6fdb5b LP |
718 | <varlistentry> |
| 719 | <term><filename>umount.target</filename></term> | |
| 720 | <listitem> | |
| 721 | <para>A special target unit | |
| 722 | that umounts all mount and | |
| 723 | automount points on system | |
| 724 | shutdown.</para> | |
| 725 | ||
| 726 | <para>Mounts that shall be | |
| 727 | unmounted on system shutdown | |
| 728 | shall add Conflicts | |
| 729 | dependencies to this unit for | |
| 730 | their mount unit, which is | |
| 731 | implicitly done when | |
| 732 | <varname>DefaultDependencies=yes</varname> | |
| 733 | is set (the default).</para> | |
| 734 | </listitem> | |
| 735 | </varlistentry> | |
| f5ccf26d | 736 | |
| 54f874c5 LP |
737 | </variablelist> |
| 738 | </refsect1> | |
| 739 | ||
| 740 | <refsect1> | |
| 741 | <title>Special System Units for Devices</title> | |
| 742 | ||
| 743 | <para>Some target units are automatically pulled in as | |
| 744 | devices of certain kinds show up in the system. These | |
| 745 | may be used to automatically activate various services | |
| 746 | based on the specific type of the available | |
| 747 | hardware.</para> | |
| 748 | ||
| 749 | <variablelist> | |
| 750 | <varlistentry> | |
| 751 | <term><filename>bluetooth.target</filename></term> | |
| 752 | <listitem> | |
| 753 | <para>This target is started | |
| 754 | automatically as soon as a | |
| 755 | Bluetooth controller is | |
| 756 | plugged in or becomes | |
| 757 | available at boot.</para> | |
| 758 | ||
| 759 | <para>This may be used to pull | |
| 760 | in Bluetooth management | |
| 761 | daemons dynamically when | |
| 762 | Bluetooth hardware is | |
| 763 | found.</para> | |
| 764 | </listitem> | |
| 765 | </varlistentry> | |
| 766 | <varlistentry> | |
| 767 | <term><filename>printer.target</filename></term> | |
| 768 | <listitem> | |
| 769 | <para>This target is started | |
| 770 | automatically as soon as a | |
| 771 | printer is plugged in or | |
| 772 | becomes available at | |
| 773 | boot.</para> | |
| 774 | ||
| 775 | <para>This may be used to pull | |
| 776 | in printer management | |
| 777 | daemons dynamically when | |
| 778 | printer hardware is | |
| 779 | found.</para> | |
| 780 | </listitem> | |
| 781 | </varlistentry> | |
| 782 | <varlistentry> | |
| 783 | <term><filename>smartcard.target</filename></term> | |
| 784 | <listitem> | |
| 785 | <para>This target is started | |
| 786 | automatically as soon as a | |
| 787 | smartcard controller is | |
| 788 | plugged in or becomes | |
| 789 | available at boot.</para> | |
| 790 | ||
| 791 | <para>This may be used to pull | |
| ab75ca91 | 792 | in smartcard management |
| 54f874c5 LP |
793 | daemons dynamically when |
| 794 | smartcard hardware is | |
| 795 | found.</para> | |
| 796 | </listitem> | |
| 797 | </varlistentry> | |
| 798 | <varlistentry> | |
| 799 | <term><filename>sound.target</filename></term> | |
| 800 | <listitem> | |
| 801 | <para>This target is started | |
| 802 | automatically as soon as a | |
| 803 | sound card is plugged in or | |
| 804 | becomes available at | |
| 805 | boot.</para> | |
| 806 | ||
| 807 | <para>This may be used to pull | |
| 808 | in audio management daemons | |
| ab75ca91 | 809 | dynamically when audio |
| 54f874c5 LP |
810 | hardware is found.</para> |
| 811 | </listitem> | |
| 812 | </varlistentry> | |
| 813 | </variablelist> | |
| 814 | </refsect1> | |
| 815 | ||
| 816 | <refsect1> | |
| 817 | <title>Special Passive System Units </title> | |
| 818 | ||
| 819 | <para>A number of special system targets are defined | |
| 820 | that can be used to properly order boot-up of optional | |
| 821 | services. These targets are generally not part of the | |
| 822 | initial boot transaction, unless they are explicitly | |
| 823 | pulled in by one of the implementing services. Note | |
| 73e231ab | 824 | specifically that these <emphasis>passive</emphasis> |
| 54f874c5 LP |
825 | target units are generally not pulled in by the |
| 826 | consumer of a service, but by the provider of the | |
| 827 | service. This means: a consuming service should order | |
| 828 | itself after these targets (as appropriate), but not | |
| 829 | pull it in. A providing service should order itself | |
| 830 | before these targets (as appropriate) and pull it in | |
| 831 | (via a <varname>Wants=</varname> type | |
| 832 | dependency).</para> | |
| 833 | ||
| dfebfe67 LP |
834 | <para>Note that these passive units cannot be started |
| 835 | manually, i.e. <literal>systemctl start | |
| 836 | time-sync.target</literal> will fail with an | |
| 837 | error. They can only be pulled in by dependency. This | |
| 838 | is enforced since they exist for ordering purposes | |
| 839 | only and thus are not useful as only unit within a | |
| 840 | transaction.</para> | |
| 841 | ||
| 54f874c5 | 842 | <variablelist> |
| 9542239e LP |
843 | <varlistentry> |
| 844 | <term><filename>cryptsetup-pre.target</filename></term> | |
| 845 | <listitem> | |
| 846 | <para>This passive target unit | |
| 847 | may be pulled in by services | |
| 848 | that want to run before any | |
| 849 | encrypted block device is set | |
| 850 | up. All encrypted block | |
| 851 | devices are set up after this | |
| 852 | target has been reached. Since | |
| 853 | the shutdown order is | |
| 854 | implicitly the reverse | |
| 8d0e0ddd | 855 | start-up order between units, |
| 9542239e LP |
856 | this target is particularly |
| 857 | useful to ensure that a | |
| 858 | service is shut down only | |
| 859 | after all encrypted block | |
| 860 | devices are fully | |
| 861 | stopped.</para> | |
| 862 | </listitem> | |
| 863 | </varlistentry> | |
| 54f874c5 LP |
864 | <varlistentry> |
| 865 | <term><filename>local-fs-pre.target</filename></term> | |
| 866 | <listitem> | |
| 867 | <para>This target unit is | |
| 868 | automatically ordered before | |
| 869 | all local mount points marked | |
| 870 | with <option>auto</option> | |
| 871 | (see above). It can be used to | |
| 872 | execute certain units before | |
| 873 | all local mounts.</para> | |
| 874 | </listitem> | |
| 875 | </varlistentry> | |
| 1183f9b2 LP |
876 | <varlistentry> |
| 877 | <term><filename>network.target</filename></term> | |
| 878 | <listitem> | |
| 0c17fbce LP |
879 | <para>This unit is supposed to |
| 880 | indicate when network | |
| 881 | functionality is available, | |
| 882 | but it is only very weakly | |
| 883 | defined what that is supposed | |
| 884 | to mean, with one exception: | |
| 885 | at shutdown, a unit that is | |
| 886 | ordered after | |
| 887 | <filename>network.target</filename> | |
| 888 | will be stopped before the | |
| 889 | network -- to whatever level | |
| 890 | it might be set up then -- is | |
| 51cb9d73 LP |
891 | shut down. It is hence useful |
| 892 | when writing service files | |
| 893 | that require network access on | |
| 894 | shutdown, which should order | |
| 895 | themselves after this target, | |
| 896 | but not pull it in. Also see | |
| 897 | <ulink | |
| 0c17fbce LP |
898 | url="http://www.freedesktop.org/wiki/Software/systemd/NetworkTarget">Running |
| 899 | Services After the Network is | |
| 900 | up</ulink> for more | |
| 901 | information. Also see | |
| 902 | <filename>network-online.target</filename> | |
| 903 | described above.</para> | |
| 904 | ||
| 1183f9b2 LP |
905 | <para>systemd automatically |
| 906 | adds dependencies of type | |
| 907 | <varname>After=</varname> for | |
| 908 | this target unit to all SysV | |
| 909 | init script service units with | |
| 910 | an LSB header referring to the | |
| 911 | <literal>$network</literal> | |
| 912 | facility.</para> | |
| 1183f9b2 LP |
913 | </listitem> |
| 914 | </varlistentry> | |
| a4a878d0 LP |
915 | <varlistentry> |
| 916 | <term><filename>network-pre.target</filename></term> | |
| 917 | <listitem> | |
| 918 | <para>This passive target unit | |
| 919 | may be pulled in by services | |
| 920 | that want to run before any | |
| 921 | network is set up, for example | |
| 922 | for the purpose of setting up a | |
| 923 | firewall. All network | |
| 924 | management software orders | |
| 925 | itself after this target, but | |
| 926 | does not pull it in.</para> | |
| 927 | </listitem> | |
| 928 | </varlistentry> | |
| 54f874c5 LP |
929 | <varlistentry> |
| 930 | <term><filename>nss-lookup.target</filename></term> | |
| 931 | <listitem> | |
| 932 | <para>A target that should be | |
| 933 | used as synchronization point | |
| 934 | for all host/network name | |
| 935 | service lookups. Note that | |
| 936 | this is independent of | |
| 937 | user/group name lookups for | |
| 938 | which | |
| 939 | <filename>nss-user-lookup.target</filename> | |
| 51cb9d73 LP |
940 | should be used. All services |
| 941 | for which the availability of | |
| 942 | full host/network name | |
| 943 | resolution is essential should | |
| 944 | be ordered after this target, | |
| 945 | but not pull it in. systemd | |
| 54f874c5 LP |
946 | automatically adds |
| 947 | dependencies of type | |
| 948 | <varname>After=</varname> for | |
| 949 | this target unit to all SysV | |
| 950 | init script service units with | |
| 951 | an LSB header referring to the | |
| 952 | <literal>$named</literal> | |
| 953 | facility.</para> | |
| 954 | </listitem> | |
| 955 | </varlistentry> | |
| 956 | <varlistentry> | |
| 957 | <term><filename>nss-user-lookup.target</filename></term> | |
| 958 | <listitem> | |
| 959 | <para>A target that should be | |
| 960 | used as synchronization point | |
| 961 | for all user/group name | |
| 962 | service lookups. Note that | |
| 963 | this is independent of | |
| 964 | host/network name lookups for | |
| 965 | which | |
| 966 | <filename>nss-lookup.target</filename> | |
| 51cb9d73 LP |
967 | should be used. All services |
| 968 | for which the availability of | |
| 969 | the full user/group database is | |
| 970 | essential should be ordered | |
| 971 | after this target, but not | |
| 972 | pull it in. Note that system | |
| 973 | users are always resolvable, | |
| 974 | and hence do not require any | |
| 975 | special ordering against this | |
| 976 | target.</para> | |
| 54f874c5 LP |
977 | </listitem> |
| 978 | </varlistentry> | |
| 979 | <varlistentry> | |
| 980 | <term><filename>remote-fs-pre.target</filename></term> | |
| 981 | <listitem> | |
| 982 | <para>This target unit is | |
| 983 | automatically ordered before | |
| 984 | all remote mount point units | |
| 985 | (see above). It can be used to | |
| 986 | run certain units before the | |
| 987 | remote mounts are | |
| 988 | established. Note that this | |
| 989 | unit is generally not part of | |
| 990 | the initial transaction, | |
| 991 | unless the unit that wants to | |
| 992 | be ordered before all remote | |
| 993 | mounts pulls it in via a | |
| 994 | <varname>Wants=</varname> type | |
| 995 | dependency. If the unit wants | |
| 996 | to be pulled in by the first | |
| 79640424 | 997 | remote mount showing up, it |
| 54f874c5 | 998 | should use |
| 8df31a9c | 999 | <filename>network-online.target</filename> |
| 54f874c5 | 1000 | (see above).</para> |
| 54f874c5 LP |
1001 | </listitem> |
| 1002 | </varlistentry> | |
| 1003 | <varlistentry> | |
| 1004 | <term><filename>rpcbind.target</filename></term> | |
| 1005 | <listitem> | |
| 51cb9d73 LP |
1006 | <para>The portmapper/rpcbind |
| 1007 | pulls in this target and | |
| 1008 | orders itself before it, to | |
| 1009 | indicate its | |
| 1010 | availability. systemd | |
| 1011 | automatically adds | |
| 1012 | dependencies of type | |
| 54f874c5 LP |
1013 | <varname>After=</varname> for |
| 1014 | this target unit to all SysV | |
| 1015 | init script service units with | |
| 1016 | an LSB header referring to the | |
| 1017 | <literal>$portmap</literal> | |
| 1018 | facility.</para> | |
| 1019 | </listitem> | |
| 1020 | </varlistentry> | |
| 1021 | <varlistentry> | |
| 1022 | <term><filename>time-sync.target</filename></term> | |
| 1023 | <listitem> | |
| 51cb9d73 LP |
1024 | <para>Services responsible for |
| 1025 | synchronizing the system clock | |
| 1026 | from a remote source (such as | |
| 1027 | NTP client implementations) | |
| 1028 | should pull in this target and | |
| 1029 | order themselves before | |
| 1030 | it. All services where correct | |
| 1031 | time is essential should be | |
| 1032 | ordered after this unit, but | |
| 1033 | not pull it in. systemd | |
| 1034 | automatically adds | |
| 1035 | dependencies of type | |
| 54f874c5 LP |
1036 | <varname>After=</varname> for |
| 1037 | this target unit to all SysV | |
| 1038 | init script service units with | |
| 1039 | an LSB header referring to the | |
| 1040 | <literal>$time</literal> | |
| 51cb9d73 | 1041 | facility. </para> |
| 54f874c5 LP |
1042 | </listitem> |
| 1043 | </varlistentry> | |
| 9f235308 LP |
1044 | </variablelist> |
| 1045 | </refsect1> | |
| 1046 | ||
| 1047 | <refsect1> | |
| af2d49f7 | 1048 | <title>Special User Units</title> |
| 9f235308 | 1049 | |
| af2d49f7 | 1050 | <para>When systemd runs as a user instance, the |
| 9f235308 LP |
1051 | following special units are available, which have |
| 1052 | similar definitions as their system counterparts: | |
| bd3d19a4 | 1053 | <filename>default.target</filename>, |
| 9f235308 | 1054 | <filename>shutdown.target</filename>, |
| e06e62f4 LP |
1055 | <filename>sockets.target</filename>, |
| 1056 | <filename>timers.target</filename>, | |
| 1057 | <filename>paths.target</filename>, | |
| 1058 | <filename>bluetooth.target</filename>, | |
| 1059 | <filename>printer.target</filename>, | |
| 1060 | <filename>smartcard.target</filename>, | |
| 1061 | <filename>sound.target</filename>.</para> | |
| a1b256b0 | 1062 | |
| b040723e | 1063 | <para>In addition, the following special unit is |
| a1b256b0 LP |
1064 | understood only when systemd runs as service instance:</para> |
| 1065 | ||
| 1066 | <variablelist> | |
| 1067 | <varlistentry> | |
| 0e0320e0 | 1068 | <term><filename>exit.target</filename></term> |
| a1b256b0 LP |
1069 | <listitem> |
| 1070 | <para>A special service unit | |
| 1071 | for shutting down the | |
| af2d49f7 | 1072 | user service manager.</para> |
| a1b256b0 LP |
1073 | |
| 1074 | <para>Applications wanting to | |
| af2d49f7 LP |
1075 | terminate the user service |
| 1076 | manager should start this | |
| 1077 | unit. If systemd receives | |
| 05cc7267 | 1078 | <constant>SIGTERM</constant> or <constant>SIGINT</constant> when running |
| 79640424 | 1079 | as user service daemon, it will |
| af2d49f7 | 1080 | start this unit.</para> |
| a1b256b0 LP |
1081 | |
| 1082 | <para>Normally, this pulls in | |
| 1083 | <filename>shutdown.target</filename> | |
| 1084 | which in turn should be | |
| 1085 | conflicted by all units that | |
| 1086 | want to be shut down on | |
| af2d49f7 | 1087 | user service manager exit.</para> |
| a1b256b0 LP |
1088 | </listitem> |
| 1089 | </varlistentry> | |
| 1090 | </variablelist> | |
| 9f235308 LP |
1091 | </refsect1> |
| 1092 | ||
| fade1ec6 ZJS |
1093 | <refsect1> |
| 1094 | <title>Special Slice Units</title> | |
| 1095 | ||
| 1096 | <para>There are four <literal>.slice</literal> units | |
| 1097 | which form the basis of the hierarchy for assignment | |
| 1098 | of resources for services, users, and virtual machines | |
| 1099 | or containers.</para> | |
| 1100 | ||
| 1101 | <variablelist> | |
| 1102 | <varlistentry> | |
| 1103 | <term><filename>-.slice</filename></term> | |
| 1104 | <listitem> | |
| 1105 | <para>The root slice is the | |
| 61ad59b1 LP |
1106 | root of the hierarchy. It |
| 1107 | usually does not contain units | |
| 1108 | directly, but may be used to | |
| 1109 | set defaults for the whole | |
| 1110 | tree.</para> | |
| fade1ec6 ZJS |
1111 | </listitem> |
| 1112 | </varlistentry> | |
| 1113 | ||
| 1114 | <varlistentry> | |
| 1115 | <term><filename>system.slice</filename></term> | |
| 1116 | <listitem> | |
| fbce1139 | 1117 | <para>By default, all services |
| fade1ec6 | 1118 | services started by |
| 61ad59b1 LP |
1119 | <command>systemd</command> are |
| 1120 | found in this slice.</para> | |
| fade1ec6 ZJS |
1121 | </listitem> |
| 1122 | </varlistentry> | |
| 1123 | ||
| 1124 | <varlistentry> | |
| 1125 | <term><filename>user.slice</filename></term> | |
| 1126 | <listitem> | |
| fbce1139 | 1127 | <para>By default, all user |
| fade1ec6 ZJS |
1128 | processes and services started |
| 1129 | on behalf of the user, | |
| 1130 | including the per-user systemd | |
| 61ad59b1 LP |
1131 | instance are found in this |
| 1132 | slice.</para> | |
| fade1ec6 ZJS |
1133 | </listitem> |
| 1134 | </varlistentry> | |
| 1135 | ||
| 1136 | <varlistentry> | |
| 1137 | <term><filename>machine.slice</filename></term> | |
| 1138 | <listitem> | |
| 08d555f3 | 1139 | <para>By default, all virtual |
| 61ad59b1 LP |
1140 | machines and containers |
| 1141 | registered with | |
| 1142 | <command>systemd-machined</command> | |
| 1143 | are found in this slice. | |
| fade1ec6 ZJS |
1144 | </para> |
| 1145 | </listitem> | |
| 1146 | </varlistentry> | |
| 1147 | </variablelist> | |
| 1148 | </refsect1> | |
| 1149 | ||
| 9f235308 LP |
1150 | <refsect1> |
| 1151 | <title>See Also</title> | |
| 1152 | <para> | |
| feb88c9f | 1153 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, |
| 5dc50792 LP |
1154 | <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>, |
| 1155 | <citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
| 1156 | <citerefentry><refentrytitle>systemd.socket</refentrytitle><manvolnum>5</manvolnum></citerefentry>, | |
| 013d8a39 | 1157 | <citerefentry><refentrytitle>systemd.target</refentrytitle><manvolnum>5</manvolnum></citerefentry>, |
| fade1ec6 | 1158 | <citerefentry><refentrytitle>systemd.slice</refentrytitle><manvolnum>5</manvolnum></citerefentry>, |
| 5aded369 | 1159 | <citerefentry project='man-pages'><refentrytitle>bootup</refentrytitle><manvolnum>7</manvolnum></citerefentry>, |
| 700e07ff | 1160 | <citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry> |
| 9f235308 LP |
1161 | </para> |
| 1162 | </refsect1> | |
| 1163 | ||
| 1164 | </refentry> |