man/systemd.special.xml.in

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   2 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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   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
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  18   General Public License for more details.
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  21   along with systemd; If not, see <http://www.gnu.org/licenses/>.
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  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>
  47                 <refpurpose>special systemd units</refpurpose>
  48         </refnamediv>
  49
  50         <refsynopsisdiv>
  51                 <para><filename>basic.target</filename>,
  52                 <filename>ctrl-alt-del.target</filename>,
  53                 <filename>@SPECIAL_DBUS_SERVICE@</filename>,
  54                 <filename>default.target</filename>,
  55                 <filename>display-manager.service</filename>,
  56                 <filename>emergency.service</filename>,
  57                 <filename>exit.service</filename>,
  58                 <filename>graphical.target</filename>,
  59                 <filename>halt.target</filename>,
  60                 <filename>kbrequest.target</filename>,
  61                 <filename>local-fs.target</filename>,
  62                 <filename>mail-transfer-agent.target</filename>,
  63                 <filename>multi-user.target</filename>,
  64                 <filename>network.target</filename>,
  65                 <filename>nss-lookup.target</filename>,
  66                 <filename>poweroff.target</filename>,
  67                 <filename>reboot.target</filename>,
  68                 <filename>remote-fs.target</filename>,
  69                 <filename>rescue.target</filename>,
  70                 <filename>rpcbind.target</filename>,
  71                 <filename>rtc-set.target</filename>,
  72                 <filename>runlevel0.target</filename>,
  73                 <filename>runlevel1.target</filename>,
  74                 <filename>runlevel2.target</filename>,
  75                 <filename>runlevel3.target</filename>,
  76                 <filename>runlevel4.target</filename>,
  77                 <filename>runlevel5.target</filename>,
  78                 <filename>runlevel6.target</filename>
  79                 <filename>shutdown.target</filename>,
  80                 <filename>sigpwr.target</filename>,
  81                 <filename>sockets.target</filename>,
  82                 <filename>swap.target</filename>,
  83                 <filename>sysinit.target</filename>,
  84                 <filename>syslog.target</filename>,
  85                 <filename>@SPECIAL_SYSLOG_SERVICE@</filename>,
  86                 <filename>systemd-initctl.service</filename>,
  87                 <filename>systemd-initctl.socket</filename>,
  88                 <filename>systemd-logger.service</filename>,
  89                 <filename>systemd-logger.socket</filename></para>
  90         </refsynopsisdiv>
  91
  92         <refsect1>
  93                 <title>Description</title>
  94
  95                 <para>A few units are treated specially by
  96                 systemd. They have special internal semantics and
  97                 cannot be renamed.</para>
  98         </refsect1>
  99
 100         <refsect1>
 101                 <title>Special System Units</title>
 102
 103                 <variablelist>
 104                         <varlistentry>
 105                                 <term><filename>basic.target</filename></term>
 106                                 <listitem>
 107                                         <para>A special target unit
 108                                         covering early boot-up.</para>
 109                                         <para>systemd automatically
 110                                         adds dependencies of the types
 111                                         Requires and After for this
 112                                         target unit to all SysV
 113                                         service units configured for
 114                                         runlevel 1 to 5.</para>
 115                                         <para>Usually this should pull
 116                                         in all sockets, mount points,
 117                                         swap devices and other basic
 118                                         initialization necessary for
 119                                         the general purpose
 120                                         daemons. Most normal daemon
 121                                         should have dependencies of
 122                                         type After and Requires on
 123                                         this unit.</para>
 124                                 </listitem>
 125                         </varlistentry>
 126                         <varlistentry>
 127                                 <term><filename>ctrl-alt-del.target</filename></term>
 128                                 <listitem>
 129                                         <para>systemd starts this
 130                                         target whenever
 131                                         Control+Alt+Del is pressed on
 132                                         the console. Usually this
 133                                         should be aliased (symlinked)
 134                                         to
 135                                         <filename>reboot.target</filename>.</para>
 136                                 </listitem>
 137                         </varlistentry>
 138                         <varlistentry>
 139                                 <term><filename>@SPECIAL_DBUS_SERVICE@</filename></term>
 140                                 <listitem>
 141                                         <para>A special unit for the
 142                                         D-Bus system bus. As soon as
 143                                         this service is fully started
 144                                         up systemd will connect to it
 145                                         and register its
 146                                         service.</para>
 147                                 </listitem>
 148                         </varlistentry>
 149                         <varlistentry>
 150                                 <term><filename>default.target</filename></term>
 151                                 <listitem>
 152                                         <para>The default unit systemd
 153                                         starts at bootup. Usually this
 154                                         should be aliased (symlinked)
 155                                         to
 156                                         <filename>multi-user.target</filename>
 157                                         or
 158                                         <filename>graphical.target</filename>.</para>
 159                                         <para>The default unit systemd
 160                                         starts at bootup can be
 161                                         overriden with the
 162                                         <varname>systemd.default=</varname>
 163                                         kernel command line option.</para>
 164                                 </listitem>
 165                         </varlistentry>
 166                         <varlistentry>
 167                                 <term><filename>display-manager.service</filename></term>
 168                                 <listitem>
 169                                         <para>The display manager
 170                                         service. Usually this should
 171                                         be aliased (symlinked) to
 172                                         <filename>gdm.service</filename>
 173                                         or a similar display manager
 174                                         service.</para>
 175                                         <para>systemd automatically
 176                                         adds dependencies of type
 177                                         After for this target unit to
 178                                         all SysV init script service
 179                                         units with an LSB header
 180                                         referring to the
 181                                         <literal>$x-display-manager</literal>
 182                                         facility, for compatibility
 183                                         with Debian.</para>
 184                                 </listitem>
 185                         </varlistentry>
 186                         <varlistentry>
 187                                 <term><filename>emergency.service</filename></term>
 188                                 <listitem>
 189                                         <para>A special service unit
 190                                         that starts an emergency
 191                                         shell on the main
 192                                         console. This unit is supposed
 193                                         to be used with the kernel
 194                                         command line option
 195                                         <varname>systemd.default=</varname>
 196                                         and has otherwise little use.
 197                                         </para>
 198                                 </listitem>
 199                         </varlistentry>
 200                         <varlistentry>
 201                                 <term><filename>graphical.target</filename></term>
 202                                 <listitem>
 203                                         <para>A special target unit
 204                                         for setting up a graphical
 205                                         login screen. This pulls in
 206                                         <filename>multi-user.target</filename>.</para>
 207
 208                                         <para>Units that are needed
 209                                         for graphical login shall add
 210                                         Wants dependencies for their
 211                                         unit to this unit (or
 212                                         <filename>multi-user.target</filename>)
 213                                         during installation.</para>
 214                                 </listitem>
 215                         </varlistentry>
 216                         <varlistentry>
 217                                 <term><filename>halt.target</filename></term>
 218                                 <listitem>
 219                                         <para>A special target unit
 220                                         for shutting down and halting the system.</para>
 221
 222                                         <para>Applications wanting to
 223                                         halt the system should start
 224                                         this unit.</para>
 225                                 </listitem>
 226                         </varlistentry>
 227                         <varlistentry>
 228                                 <term><filename>kbrequest.target</filename></term>
 229                                 <listitem>
 230                                         <para>systemd starts this
 231                                         target whenever Alt+ArrowUp is
 232                                         pressed on the console. This
 233                                         is a good candidate to be
 234                                         aliased (symlinked) to
 235                                         <filename>rescue.target</filename>.</para>
 236                                 </listitem>
 237                         </varlistentry>
 238                         <varlistentry>
 239                                 <term><filename>local-fs.target</filename></term>
 240                                 <listitem>
 241                                         <para>systemd automatically
 242                                         adds dependencies of type
 243                                         After to all mount units that
 244                                         refer to local mount points
 245                                         for this target unit. In
 246                                         addition, systemd adds
 247                                         dependencies of type Wants to
 248                                         this target unit for those
 249                                         mounts listed in
 250                                         <filename>/etc/fstab</filename>
 251                                         that have the
 252                                         <literal>auto</literal> and
 253                                         <literal>comment=systemd.mount</literal>
 254                                         mount options set.</para>
 255
 256                                         <para>systemd automatically
 257                                         adds dependencies of type
 258                                         After for this target unit to
 259                                         all SysV init script service
 260                                         units with an LSB header
 261                                         referring to the
 262                                         <literal>$local_fs</literal>
 263                                         facility.</para>
 264                                 </listitem>
 265                         </varlistentry>
 266                         <varlistentry>
 267                                 <term><filename>mail-transfer-agent.target</filename></term>
 268                                 <listitem>
 269                                         <para>The mail transfer agent
 270                                         (MTA) service. Usually this
 271                                         should pull in all units
 272                                         necessary for
 273                                         sending/receiving mails on the
 274                                         local host.</para>
 275
 276                                         <para>systemd automatically
 277                                         adds dependencies of type
 278                                         After for this target unit to
 279                                         all SysV init script service
 280                                         units with an LSB header
 281                                         referring to the
 282                                         <literal>$mail-transfer-argent</literal>
 283                                         or
 284                                         <literal>$mail-transport-agent</literal>
 285                                         facilities, for compatibility
 286                                         with Debian.</para>
 287                                 </listitem>
 288                         </varlistentry>
 289                         <varlistentry>
 290                                 <term><filename>multi-user.target</filename></term>
 291                                 <listitem>
 292                                         <para>A special target unit
 293                                         for setting up a multi-user
 294                                         system (non-graphical). This
 295                                         is pulled in by
 296                                         <filename>graphical.target</filename>.</para>
 297
 298                                         <para>Units that are needed
 299                                         for a multi-user system shall
 300                                         add Wants dependencies to
 301                                         this unit for their unit during
 302                                         installation.</para>
 303                                 </listitem>
 304                         </varlistentry>
 305                         <varlistentry>
 306                                 <term><filename>network.target</filename></term>
 307                                 <listitem>
 308                                         <para>systemd automatically
 309                                         adds dependencies of type
 310                                         After for this target unit to
 311                                         all SysV init script service
 312                                         units with an LSB header
 313                                         referring to the
 314                                         <literal>$network</literal>
 315                                         facility.</para>
 316                                 </listitem>
 317                         </varlistentry>
 318                         <varlistentry>
 319                                 <term><filename>nss-lookup.target</filename></term>
 320                                 <listitem>
 321                                         <para>systemd automatically
 322                                         adds dependencies of type
 323                                         After for this target unit to
 324                                         all SysV init script service
 325                                         units with an LSB header
 326                                         referring to the
 327                                         <literal>$named</literal>
 328                                         facility.</para>
 329                                 </listitem>
 330                         </varlistentry>
 331                         <varlistentry>
 332                                 <term><filename>poweroff.target</filename></term>
 333                                 <listitem>
 334                                         <para>A special target unit
 335                                         for shutting down and powering off the system.</para>
 336
 337                                         <para>Applications wanting to
 338                                         power off the system should start
 339                                         this unit.</para>
 340
 341                                         <para><filename>runlevel0.target</filename>
 342                                         is an alias for this target
 343                                         unit, for compatibility with SysV.</para>
 344                                 </listitem>
 345                         </varlistentry>
 346                         <varlistentry>
 347                                 <term><filename>reboot.target</filename></term>
 348                                 <listitem>
 349                                         <para>A special target unit
 350                                         for shutting down and rebooting the system.</para>
 351
 352                                         <para>Applications wanting to
 353                                         reboot the system should start
 354                                         this unit.</para>
 355
 356                                         <para><filename>runlevel6.target</filename>
 357                                         is an alias for this target
 358                                         unit, for compatibility with SysV.</para>
 359                                 </listitem>
 360                         </varlistentry>
 361                         <varlistentry>
 362                                 <term><filename>remote-fs.target</filename></term>
 363                                 <listitem>
 364                                         <para>Similar to
 365                                         <filename>local-fs.target</filename>,
 366                                         but for remote mount
 367                                         points.</para>
 368
 369                                         <para>systemd automatically
 370                                         adds dependencies of type
 371                                         After for this target unit to
 372                                         all SysV init script service
 373                                         units with an LSB header
 374                                         referring to the
 375                                         <literal>$remote_fs</literal>
 376                                         facility.</para>
 377                                 </listitem>
 378                         </varlistentry>
 379                         <varlistentry>
 380                                 <term><filename>rescue.target</filename></term>
 381                                 <listitem>
 382                                         <para>A special target unit
 383                                         for setting up the base system
 384                                         and a rescue shell.</para>
 385
 386                                         <para><filename>runlevel1.target</filename>
 387                                         is an alias for this target
 388                                         unit, for compatibility with SysV.</para>
 389                                 </listitem>
 390                         </varlistentry>
 391                         <varlistentry>
 392                                 <term><filename>rpcbind.target</filename></term>
 393                                 <listitem>
 394                                         <para>systemd automatically
 395                                         adds dependencies of type
 396                                         After for this target unit to
 397                                         all SysV init script service
 398                                         units with an LSB header
 399                                         referring to the
 400                                         <literal>$rpcbind</literal>
 401                                         facility.</para>
 402                                 </listitem>
 403                         </varlistentry>
 404                         <varlistentry>
 405                                 <term><filename>rtc-set.target</filename></term>
 406                                 <listitem>
 407                                         <para>systemd automatically
 408                                         adds dependencies of type
 409                                         After for this target unit to
 410                                         all SysV init script service
 411                                         units with an LSB header
 412                                         referring to the
 413                                         <literal>$time</literal>
 414                                         facility.</para>
 415                                 </listitem>
 416                         </varlistentry>
 417                         <varlistentry>
 418                                 <term><filename>runlevel0.target</filename></term>
 419                                 <listitem>
 420                                         <para>This is a target that is
 421                                         called whever the SysV
 422                                         compatibility code asks for
 423                                         runlevel 0. This is an alias
 424                                         for
 425                                         <filename>poweroff.target</filename>,
 426                                         for compatibility with
 427                                         SysV.</para>
 428                                 </listitem>
 429                         </varlistentry>
 430                         <varlistentry>
 431                                 <term><filename>runlevel1.target</filename></term>
 432                                 <listitem>
 433                                         <para>This is a target that is
 434                                         called whever the SysV
 435                                         compatibility code asks for
 436                                         runlevel 1. This is an alias
 437                                         for
 438                                         <filename>rescue.target</filename>,
 439                                         for compatibility with
 440                                         SysV.</para>
 441                                 </listitem>
 442                         </varlistentry>
 443                         <varlistentry>
 444                                 <term><filename>runlevel2.target</filename></term>
 445                                 <listitem>
 446                                         <para>This is a target that is
 447                                         called whever the SysV
 448                                         compatibility code asks for
 449                                         runlevel 2. It is a good idea
 450                                         to make this an alias for
 451                                         (i.e. symlink to)
 452                                         <filename>multi-user.target</filename>.</para>
 453                                 </listitem>
 454                         </varlistentry>
 455                         <varlistentry>
 456                                 <term><filename>runlevel3.target</filename></term>
 457                                 <listitem>
 458                                         <para>This is a target that is
 459                                         called whever the SysV
 460                                         compatibility code asks for
 461                                         runlevel 3. It is a good idea
 462                                         to make this an alias for
 463                                         (i.e. symlink to)
 464                                         <filename>multi-user.target</filename>
 465                                         or
 466                                         <filename>graphical.target</filename>.</para>
 467                                 </listitem>
 468                         </varlistentry>
 469                         <varlistentry>
 470                                 <term><filename>runlevel4.target</filename></term>
 471                                 <listitem>
 472                                         <para>This is a target that is
 473                                         called whever the SysV
 474                                         compatibility code asks for
 475                                         runlevel 4. It is a good idea
 476                                         to make this an alias for
 477                                         (i.e. symlink to)
 478                                         <filename>multi-user.target</filename>
 479                                         or
 480                                         <filename>graphical.target</filename>.</para>
 481                                 </listitem>
 482                         </varlistentry>
 483                         <varlistentry>
 484                                 <term><filename>runlevel5.target</filename></term>
 485                                 <listitem>
 486                                         <para>This is a target that is
 487                                         called whever the SysV
 488                                         compatibility code asks for
 489                                         runlevel 5. It is a good idea
 490                                         to make this an alias for
 491                                         (i.e. symlink to)
 492                                         <filename>multi-user.target</filename>
 493                                         or
 494                                         <filename>graphical.target</filename>.</para>
 495                                 </listitem>
 496                         </varlistentry>
 497                         <varlistentry>
 498                                 <term><filename>runlevel6.target</filename></term>
 499                                 <listitem>
 500                                         <para>This is a target that is
 501                                         called whever the SysV
 502                                         compatibility code asks for
 503                                         runlevel 6. This is an alias
 504                                         for
 505                                         <filename>reboot.target</filename>,
 506                                         for compatibility with
 507                                         SysV.</para>
 508                                 </listitem>
 509                         </varlistentry>
 510                         <varlistentry>
 511                                 <term><filename>shutdown.target</filename></term>
 512                                 <listitem>
 513                                         <para>A special target unit
 514                                         that terminates the services
 515                                         on system shutdown.</para>
 516
 517                                         <para>Services that shall be
 518                                         terminated on system shutdown
 519                                         shall add Conflicts
 520                                         dependencies to this unit for
 521                                         their service unit during
 522                                         installation.</para>
 523
 524                                         <para>systemd automatically
 525                                         adds dependencies of type
 526                                         Conflicts to this target unit
 527                                         for all SysV init script
 528                                         service units that shall be
 529                                         terminated in SysV runlevels 0
 530                                         or 6.</para>
 531                                 </listitem>
 532                         </varlistentry>
 533                         <varlistentry>
 534                                 <term><filename>sigpwr.target</filename></term>
 535                                 <listitem>
 536                                         <para>A special target that is
 537                                         started when systemd receives
 538                                         the SIGPWR process signal,
 539                                         which is normally sent by the
 540                                         kernel or UPS daemons when
 541                                         power fails.</para>
 542                                 </listitem>
 543                         </varlistentry>
 544                         <varlistentry>
 545                                 <term><filename>sockets.target</filename></term>
 546                                 <listitem>
 547                                         <para>A special target unit
 548                                         that sets up all service
 549                                         sockets.</para>
 550
 551                                         <para>Services that can be
 552                                         socket-activated shall add
 553                                         Wants dependencies to this
 554                                         unit for their socket unit
 555                                         during installation.</para>
 556                                 </listitem>
 557                         </varlistentry>
 558                         <varlistentry>
 559                                 <term><filename>swap.target</filename></term>
 560                                 <listitem>
 561                                         <para>Similar to
 562                                         <filename>local-fs.target</filename>, but for swap
 563                                         partitions and swap
 564                                         files.</para>
 565                                 </listitem>
 566                         </varlistentry>
 567                         <varlistentry>
 568                                 <term><filename>syslog.target</filename></term>
 569                                 <listitem>
 570                                         <para>systemd automatically
 571                                         adds dependencies of type
 572                                         After for this target unit to
 573                                         all SysV init script service
 574                                         units with an LSB header
 575                                         referring to the
 576                                         <literal>$syslog</literal>
 577                                         facility.</para>
 578
 579                                         <para>Administrators should
 580                                         ensure that this target pulls
 581                                         in a service unit with the
 582                                         name or alias of
 583                                         <filename>@SPECIAL_SYSLOG_SERVICE@</filename>
 584                                         (or a socket unit that
 585                                         activates this
 586                                         service).</para>
 587                                 </listitem>
 588                         </varlistentry>
 589                         <varlistentry>
 590                                 <term><filename>sysinit.target</filename></term>
 591                                 <listitem>
 592                                         <para>A special target unit
 593                                         covering early boot-up scripts.</para>
 594                                         <para>systemd automatically
 595                                         adds dependencies of the types
 596                                         Wants and After for all
 597                                         SysV service units configured
 598                                         for runlevels that are not 0
 599                                         to 6 to this target unit.
 600                                         This covers the special
 601                                         boot-up runlevels some
 602                                         distributions have, such as S
 603                                         or b.</para>
 604                                 </listitem>
 605                         </varlistentry>
 606                         <varlistentry>
 607                                 <term><filename>@SPECIAL_SYSLOG_SERVICE@</filename></term>
 608                                 <listitem>
 609                                         <para>A special unit for the
 610                                         syslog daemon. As soon as
 611                                         this service is fully started
 612                                         up systemd will connect to it
 613                                         and use it for logging if it
 614                                         has been configured for
 615                                         that.</para>
 616                                         <para>Applications should
 617                                         generally not depend on this
 618                                         service, and depend on
 619                                         <filename>syslog.target</filename>
 620                                         instead.</para>
 621                                 </listitem>
 622                         </varlistentry>
 623                         <varlistentry>
 624                                 <term><filename>systemd-initctl.service</filename></term>
 625                                 <listitem>
 626                                         <para>This provides
 627                                         compatibility with the SysV
 628                                         /dev/initctl file system FIFO
 629                                         for communication with the
 630                                         init system.</para>
 631                                         <para>This is a
 632                                         socket-activated service, see
 633                                         <filename>system-initctl.socket</filename>.</para>
 634                                 </listitem>
 635                         </varlistentry>
 636                         <varlistentry>
 637                                 <term><filename>systemd-initctl.socket</filename></term>
 638                                 <listitem>
 639                                         <para>Socket activation unit
 640                                         for
 641                                         <filename>system-initctl.service</filename>.</para>
 642                                 </listitem>
 643                         </varlistentry>
 644                         <varlistentry>
 645                                 <term><filename>systemd-logger.service</filename></term>
 646                                 <listitem>
 647                                         <para>This is internally used
 648                                         by systemd to provide syslog
 649                                         logging to the processes it
 650                                         maintains.</para>
 651                                         <para>This is a
 652                                         socket-activated service, see
 653                                         <filename>system-logger.socket</filename>.</para>
 654                                 </listitem>
 655                         </varlistentry>
 656                         <varlistentry>
 657                                 <term><filename>systemd-logger.socket</filename></term>
 658                                 <listitem>
 659                                         <para>Socket activation unit
 660                                         for
 661                                         <filename>system-logger.service</filename>. systemd
 662                                         will automatically add
 663                                         dependencies of types Requires
 664                                         and After to all units that
 665                                         have been configured for
 666                                         stdout or stderr to be
 667                                         connected to syslog or the
 668                                         kernel log buffer.</para>
 669                                 </listitem>
 670                         </varlistentry>
 671                 </variablelist>
 672         </refsect1>
 673
 674         <refsect1>
 675                 <title>Special Session Units</title>
 676
 677                 <para>When systemd runs as a service instance, the
 678                 following special units are available, which have
 679                 similar definitions as their system counterparts:
 680                 <filename>default.target</filename>,
 681                 <filename>local-fs.target</filename>,
 682                 <filename>remote-fs.target</filename>,
 683                 <filename>shutdown.target</filename>,
 684                 <filename>sockets.target</filename>,
 685                 <filename>swap.target</filename>.</para>
 686
 687                 <para>In addition the following special unit is
 688                 understood only when systemd runs as service instance:</para>
 689
 690                 <variablelist>
 691                         <varlistentry>
 692                                 <term><filename>exit.service</filename></term>
 693                                 <listitem>
 694                                         <para>A special service unit
 695                                         for shutting down the
 696                                         session.</para>
 697
 698                                         <para>Applications wanting to
 699                                         terminate the session should
 700                                         start this unit. If systemd
 701                                         receives SIGTERM or SIGINT
 702                                         when running as session daemon
 703                                         it will start this
 704                                         unit.</para>
 705
 706                                         <para>Normally, this pulls in
 707                                         <filename>shutdown.target</filename>
 708                                         which in turn should be
 709                                         conflicted by all units that
 710                                         want to be shut down on
 711                                         session exit.</para>
 712                                 </listitem>
 713                         </varlistentry>
 714                 </variablelist>
 715         </refsect1>
 716
 717         <refsect1>
 718                   <title>See Also</title>
 719                   <para>
 720                           <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
 721                           <citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>
 722                           <citerefentry><refentrytitle>systemd.socket</refentrytitle><manvolnum>5</manvolnum></citerefentry>
 723                           <citerefentry><refentrytitle>systemd.target</refentrytitle><manvolnum>5</manvolnum></citerefentry>
 724                   </para>
 725         </refsect1>
 726
 727 </refentry>