source: chapter06/systemd.xml@ c06f49a

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Last change on this file since c06f49a was c06f49a, checked in by Douglas R. Reno <renodr@…>, 21 months ago

Update to systemd-245

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1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3 "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
4 <!ENTITY % general-entities SYSTEM "../general.ent">
5 %general-entities;
6]>
7
8<sect1 id="ch-system-systemd" role="wrap" revision="systemd">
9 <?dbhtml filename="systemd.html"?>
10
11 <sect1info condition="script">
12 <productname>systemd</productname>
13 <productnumber>&systemd-version;</productnumber>
14 <address>&systemd-url;</address>
15 </sect1info>
16
17 <title>Systemd-&systemd-version;</title>
18
19 <indexterm zone="ch-system-systemd">
20 <primary sortas="a-systemd">systemd</primary>
21 </indexterm>
22
23 <sect2 role="package">
24 <title/>
25
26 <para>The systemd package contains programs for controlling the startup,
27 running, and shutdown of the system.</para>
28
29 <segmentedlist>
30 <segtitle>&buildtime;</segtitle>
31 <segtitle>&diskspace;</segtitle>
32
33 <seglistitem>
34 <seg>&systemd-ch6-sbu;</seg>
35 <seg>&systemd-ch6-du;</seg>
36 </seglistitem>
37 </segmentedlist>
38 </sect2>
39
40 <sect2 role="installation">
41 <title>Installation of systemd</title>
42<!--
43 <para>First, apply a patch to fix various bugs since the release
44 of systemd-243.</para>
45
46<screen><userinput remap="pre">patch -Np1 -i ../systemd-&systemd-version;-consolidated_fixes-2.patch</userinput></screen>
47-->
48
49 <para>Create a symlink to work around missing xsltproc:</para>
50
51<screen><userinput remap="pre">ln -sf /tools/bin/true /usr/bin/xsltproc</userinput></screen>
52
53 <para>Because we have not yet installed the final version of Util-Linux,
54 create links to the libraries in the appropriate location:</para>
55
56<screen><userinput remap="pre">for file in /tools/lib/lib{blkid,mount,uuid}.so*; do
57 ln -sf $file /usr/lib/
58done</userinput></screen>
59
60 <para>Set up the man pages:</para>
61
62<screen><userinput remap="pre">tar -xf ../systemd-man-pages-&systemd-version;.tar.xz</userinput></screen>
63
64 <para>Remove tests that cannot be built in chroot:</para>
65
66<screen><userinput remap="pre">sed '179,$ d' -i src/resolve/meson.build</userinput></screen>
67
68 <para>Remove an unneeded group,
69 <systemitem class="groupname">render</systemitem>, from the default udev
70 rules:</para>
71
72<screen><userinput remap="pre">sed -i 's/GROUP="render", //' rules.d/50-udev-default.rules.in</userinput></screen>
73
74 <para>Prepare systemd for compilation:</para>
75
76<screen><userinput remap="configure">mkdir -p build
77cd build
78
79PKG_CONFIG_PATH="/usr/lib/pkgconfig:/tools/lib/pkgconfig" \
80LANG=en_US.UTF-8 \
81meson --prefix=/usr \
82 --sysconfdir=/etc \
83 --localstatedir=/var \
84 -Dblkid=true \
85 -Dbuildtype=release \
86 -Ddefault-dnssec=no \
87 -Dfirstboot=false \
88 -Dinstall-tests=false \
89 -Dkmod-path=/bin/kmod \
90 -Dldconfig=false \
91 -Dmount-path=/bin/mount \
92 -Drootprefix= \
93 -Drootlibdir=/lib \
94 -Dsplit-usr=true \
95 -Dsulogin-path=/sbin/sulogin \
96 -Dsysusers=false \
97 -Dumount-path=/bin/umount \
98 -Db_lto=false \
99 -Drpmmacrosdir=no \
100 -Dhomed=false \
101 -Duserdb=false \
102 ..</userinput></screen>
103
104 <variablelist>
105 <title>The meaning of the meson options:</title>
106
107 <varlistentry>
108 <term><parameter>-D*-path=*</parameter></term>
109 <listitem>
110 <para>These switches provide location of binaries needed by
111 systemd at runtime that have not yet been installed, or who's
112 pkgconfig files are currently only in
113 <filename>/tools/lib/pkgconfig</filename>.</para>
114 </listitem>
115 </varlistentry>
116
117 <varlistentry>
118 <term><parameter>-Ddefault-dnssec=no</parameter></term>
119 <listitem>
120 <para>This switch turns off the experimental DNSSEC support.</para>
121 </listitem>
122 </varlistentry>
123
124 <varlistentry>
125 <term><parameter>-Dfirstboot=false</parameter></term>
126 <listitem>
127 <para>This switch prevents installation of systemd
128 services responsible for setting up the system for
129 the first time. They are not useful for LFS because
130 everything is done manually.</para>
131 </listitem>
132 </varlistentry>
133
134 <varlistentry>
135 <term><parameter>-Dinstall-tests=false</parameter></term>
136 <listitem>
137 <para>This switch prevents installation of the compiled tests.</para>
138 </listitem>
139 </varlistentry>
140
141 <varlistentry>
142 <term><parameter>-Dldconfig=false</parameter></term>
143 <listitem>
144 <para>This switch prevents installation of a systemd unit that runs
145 <command>ldconfig</command> at boot, which is not useful for source
146 distributions such as LFS and makes the boot time longer. Remove it
147 if the described feature is desired.</para>
148 </listitem>
149 </varlistentry>
150
151 <varlistentry>
152 <term><parameter>-Droot*</parameter></term>
153 <listitem>
154 <para>These switches ensure that core programs and
155 shared libraries are installed in the subdirectories
156 of the root partition.</para>
157 </listitem>
158 </varlistentry>
159
160 <varlistentry>
161 <term><parameter>-Dsplit-usr=true</parameter></term>
162 <listitem>
163 <para>This switch ensures that systemd will work on
164 systems where /bin, /lib and /sbin directories are not
165 symlinks to their /usr counterparts.</para>
166 </listitem>
167 </varlistentry>
168
169 <varlistentry>
170 <term><parameter>-Dsysusers=false</parameter></term>
171 <listitem>
172 <para>This switch prevents installation of systemd
173 services responsible for setting up the
174 <filename>/etc/group</filename> and
175 <filename>/etc/passwd</filename> files. Both files
176 were created earlier in this chapter.</para>
177 </listitem>
178 </varlistentry>
179
180 <varlistentry>
181 <term><parameter>-Drpmmacrosdir=no</parameter></term>
182 <listitem>
183 <para>This switch disables installation of RPM Macros
184 for use with systemd because LFS does not support RPM.</para>
185 </listitem>
186 </varlistentry>
187
188 <varlistentry>
189 <term><parameter>-D{userdb,homed}=false</parameter></term>
190 <listitem>
191 <para>Remove two daemons that have dependencies that do not fit
192 the scope of LFS.</para>
193 </listitem>
194 </varlistentry>
195
196 </variablelist>
197
198 <para>Compile the package:</para>
199
200<screen><userinput remap="make">LANG=en_US.UTF-8 ninja</userinput></screen>
201<!--
202 <para>To test the package, execute the following command:</para>
203
204<screen><userinput remap="test">LANG=en_US.UTF-8 ninja test</userinput></screen>
205-->
206 <para>Install the package:</para>
207
208<screen><userinput remap="install">LANG=en_US.UTF-8 ninja install</userinput></screen>
209
210 <para>Remove an unnecessary symbolic link:</para>
211
212<screen><userinput remap="install">rm -f /usr/bin/xsltproc</userinput></screen>
213
214 <para>Create the <filename>/etc/machine-id</filename> file needed by
215 <command>systemd-journald</command>:</para>
216
217<screen><userinput remap="adjust">systemd-machine-id-setup</userinput></screen>
218
219 <para>Setup the basic target structure:</para>
220
221<screen><userinput remap="adjust">systemctl preset-all</userinput></screen>
222
223 <para>Disable a service that is known to cause problems with systems that
224 use a network configuration other than what is provided by
225 systemd-networkd:</para>
226 <!-- Observed halting startup with dhcpcd handling the primary NIC -->
227
228<screen><userinput remap="adjust">systemctl disable systemd-time-wait-sync.service</userinput></screen>
229
230 <para>Prevent systemd from resetting the maximum PID value which causes
231 some problems with packages and units in BLFS:</para>
232
233
234<screen><userinput remap="adjust">rm -f /usr/lib/sysctl.d/50-pid-max.conf</userinput></screen>
235
236 <para>Cleanup symbolic links to Util-Linux libraries:</para>
237
238<screen><userinput remap="adjust">rm -fv /usr/lib/lib{blkid,uuid,mount}.so*</userinput></screen>
239 <!--
240 <para>Prevent systemd from creating <filename>/run/nologin</filename>
241 to allow unprivileged user logins without
242 <application>systemd-logind</application>:</para>
243
244<screen><userinput remap="adjust">rm -f /usr/lib/tmpfiles.d/systemd-nologin.conf</userinput></screen>
245 -->
246 </sect2>
247
248 <sect2 id="contents-systemd" role="content">
249 <title>Contents of systemd</title>
250
251 <segmentedlist>
252 <segtitle>Installed programs</segtitle>
253 <segtitle>Installed libraries</segtitle>
254 <segtitle>Installed directories</segtitle>
255
256 <seglistitem>
257 <seg>bootctl, busctl, coredumpctl, halt (symlink to systemctl),
258 hostnamectl, init, journalctl, kernel-install, localectl, loginctl,
259 machinectl, networkctl, portablectl, poweroff (symlink to
260 systemctl), reboot (symlink to systemctl), resolvconf (symlink to
261 resolvectl), resolvectl, runlevel (symlink to systemctl), shutdown
262 (symlink to systemctl), systemctl, systemd-analyze,
263 systemd-ask-password, systemd-cat, systemd-cgls, systemd-cgtop,
264 systemd-delta, systemd-detect-virt, systemd-escape, systemd-hwdb,
265 systemd-id128, systemd-inhibit, systemd-machine-id-setup,
266 systemd-mount, systemd-notify, systemd-nspawn, systemd-path,
267 systemd-repart, systemd-resolve (symlink to resolvectl), systemd-run,
268 systemd-socket-activate, systemd-stdio-bridge, systemd-tmpfiles,
269 systemd-tty-ask-password-agent, systemd-umount (symlink to
270 systemd-mount), telinit (symlink to systemctl), timedatectl, and
271 udevadm</seg>
272 <seg>libnss_myhostname.so.2, libnss_mymachines.so.2,
273 libnss_resolve.so.2, libnss_systemd.so.2,
274 libsystemd.so, libsystemd-shared-&systemd-version;.so (in /lib/systemd),
275 and libudev.so</seg>
276 <seg>/etc/binfmt.d, /etc/init.d, /etc/kernel, /etc/modules-load.d,
277 /etc/sysctl.d, /etc/systemd, /etc/tmpfiles.d, /etc/udev,
278 /etc/xdg/systemd, /lib/systemd, /lib/udev, /usr/include/systemd,
279 /usr/lib/binfmt.d, /usr/lib/kernel, /usr/lib/modules-load.d,
280 /usr/lib/sysctl.d, /usr/lib/systemd, /usr/lib/tmpfiles.d,
281 /usr/share/doc/systemd-&systemd-version;, /usr/share/factory,
282 /usr/share/systemd, /var/lib/systemd, and /var/log/journal</seg>
283 </seglistitem>
284 </segmentedlist>
285
286 <variablelist>
287 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
288 <?dbfo list-presentation="list"?>
289 <?dbhtml list-presentation="table"?>
290
291 <varlistentry id="bootctl">
292 <term><command>bootctl</command></term>
293 <listitem>
294 <para>Used to query the firmware and boot manager settings</para>
295 <indexterm zone="ch-system-systemd bootctl">
296 <primary sortas="b-bootctl">bootctl</primary>
297 </indexterm>
298 </listitem>
299 </varlistentry>
300
301 <varlistentry id="busctl">
302 <term><command>busctl</command></term>
303 <listitem>
304 <para>Used to introspect and monitor the D-Bus bus</para>
305 <indexterm zone="ch-system-systemd busctl">
306 <primary sortas="b-busctl">busctl</primary>
307 </indexterm>
308 </listitem>
309 </varlistentry>
310
311 <varlistentry id="coredumpctl">
312 <term><command>coredumpctl</command></term>
313 <listitem>
314 <para>Used to retrieve coredumps from the systemd journal</para>
315 <indexterm zone="ch-system-systemd coredumpctl">
316 <primary sortas="b-coredumpctl">coredumpctl</primary>
317 </indexterm>
318 </listitem>
319 </varlistentry>
320
321 <varlistentry id="halt">
322 <term><command>halt</command></term>
323 <listitem>
324 <para>Normally invokes <command>shutdown</command> with the
325 <parameter>-h</parameter> option, except when already in run-level 0,
326 then it tells the kernel to halt the system; it notes in the
327 file <filename>/var/log/wtmp</filename> that the system is being
328 brought down</para>
329 <indexterm zone="ch-system-systemd halt">
330 <primary sortas="b-halt">halt</primary>
331 </indexterm>
332 </listitem>
333 </varlistentry>
334
335 <varlistentry id="hostnamectl">
336 <term><command>hostnamectl</command></term>
337 <listitem>
338 <para>Used to query and change the system hostname and related
339 settings</para>
340 <indexterm zone="ch-system-systemd hostnamectl">
341 <primary sortas="b-hostnamectl">hostnamectl</primary>
342 </indexterm>
343 </listitem>
344 </varlistentry>
345
346 <varlistentry id="init">
347 <term><command>init</command></term>
348 <listitem>
349 <para>The first process to be started when the kernel has initialized
350 the hardware which takes over the boot process and starts all
351 processes according to its configuration files</para>
352 <indexterm zone="ch-system-systemd init">
353 <primary sortas="b-init">init</primary>
354 </indexterm>
355 </listitem>
356 </varlistentry>
357
358 <varlistentry id="journalctl">
359 <term><command>journalctl</command></term>
360 <listitem>
361 <para>Used to query the contents of the systemd journal</para>
362 <indexterm zone="ch-system-systemd journalctl">
363 <primary sortas="b-journalctl">journalctl</primary>
364 </indexterm>
365 </listitem>
366 </varlistentry>
367
368 <varlistentry id="kernel-install">
369 <term><command>kernel-install</command></term>
370 <listitem>
371 <para>Used to add and remove kernel and initramfs images to and
372 from /boot</para>
373 <indexterm zone="ch-system-systemd kernel-install">
374 <primary sortas="b-kernel-install">kernel-install</primary>
375 </indexterm>
376 </listitem>
377 </varlistentry>
378
379 <varlistentry id="localectl">
380 <term><command>localectl</command></term>
381 <listitem>
382 <para>Used to query and change the system locale and keyboard layout
383 settings</para>
384 <indexterm zone="ch-system-systemd localectl">
385 <primary sortas="b-localectl">localectl</primary>
386 </indexterm>
387 </listitem>
388 </varlistentry>
389
390 <varlistentry id="loginctl">
391 <term><command>loginctl</command></term>
392 <listitem>
393 <para>Used to introspect and control the state of the systemd Login
394 Manager</para>
395 <indexterm zone="ch-system-systemd loginctl">
396 <primary sortas="b-loginctl">loginctl</primary>
397 </indexterm>
398 </listitem>
399 </varlistentry>
400
401 <varlistentry id="machinectl">
402 <term><command>machinectl</command></term>
403 <listitem>
404 <para>Used to introspect and control the state of the systemd Virtual
405 Machine and Container Registration Manager</para>
406 <indexterm zone="ch-system-systemd machinectl">
407 <primary sortas="b-machinectl">machinectl</primary>
408 </indexterm>
409 </listitem>
410 </varlistentry>
411
412 <varlistentry id="networkctl">
413 <term><command>networkctl</command></term>
414 <listitem>
415 <para>Used to introspect the state of the network links as seen by
416 systemd-networkd</para>
417 <indexterm zone="ch-system-systemd networkctl">
418 <primary sortas="b-networkctl">networkctl</primary>
419 </indexterm>
420 </listitem>
421 </varlistentry>
422
423 <varlistentry id="portablectl">
424 <term><command>portablectl</command></term>
425 <listitem>
426 <para>Used to attach or detach portable services from the local
427 system</para>
428 <indexterm zone="ch-system-systemd portablectl">
429 <primary sortas="b-portablectl">portablectl</primary>
430 </indexterm>
431 </listitem>
432 </varlistentry>
433
434 <varlistentry id="poweroff">
435 <term><command>poweroff</command></term>
436 <listitem>
437 <para>Tells the kernel to halt the system and switch off the computer
438 (see <command>halt</command>)</para>
439 <indexterm zone="ch-system-systemd poweroff">
440 <primary sortas="b-poweroff">poweroff</primary>
441 </indexterm>
442 </listitem>
443 </varlistentry>
444
445 <varlistentry id="reboot">
446 <term><command>reboot</command></term>
447 <listitem>
448 <para>Tells the kernel to reboot the system (see
449 <command>halt</command>)</para>
450 <indexterm zone="ch-system-systemd reboot">
451 <primary sortas="b-reboot">reboot</primary>
452 </indexterm>
453 </listitem>
454 </varlistentry>
455
456 <varlistentry id="resolvconf">
457 <term><command>resolvconf</command></term>
458 <listitem>
459 <para>Register DNS server and domain configuration with
460 <command>systemd-resolved</command></para>
461 <indexterm zone="ch-system-systemd resolvconf">
462 <primary sortas="b-resolvconf">resolvconf</primary>
463 </indexterm>
464 </listitem>
465 </varlistentry>
466
467 <varlistentry id="resolvectl">
468 <term><command>resolvectl</command></term>
469 <listitem>
470 <para>Send control commands to the network name resolution
471 manager, or resolve domain names, IPv4 and IPv6 addresses,
472 DNS records, and services.</para>
473 <indexterm zone="ch-system-systemd resolvectl">
474 <primary sortas="b-resolvectl">resolvectl</primary>
475 </indexterm>
476 </listitem>
477 </varlistentry>
478
479 <varlistentry id="runlevel">
480 <term><command>runlevel</command></term>
481 <listitem>
482 <para>Reports the previous and the current run-level, as noted in the
483 last run-level record in <filename>/var/run/utmp</filename></para>
484 <indexterm zone="ch-system-systemd runlevel">
485 <primary sortas="b-runlevel">runlevel</primary>
486 </indexterm>
487 </listitem>
488 </varlistentry>
489
490 <varlistentry id="shutdown">
491 <term><command>shutdown</command></term>
492 <listitem>
493 <para>Brings the system down in a secure way, signaling all processes
494 and notifying all logged-in users</para>
495 <indexterm zone="ch-system-systemd shutdown">
496 <primary sortas="b-shutdown">shutdown</primary>
497 </indexterm>
498 </listitem>
499 </varlistentry>
500
501 <varlistentry id="systemctl">
502 <term><command>systemctl</command></term>
503 <listitem>
504 <para>Used to introspect and control the state of the systemd system
505 and service manager</para>
506 <indexterm zone="ch-system-systemd systemctl">
507 <primary sortas="b-systemctl">systemctl</primary>
508 </indexterm>
509 </listitem>
510 </varlistentry>
511
512 <varlistentry id="systemd-analyze">
513 <term><command>systemd-analyze</command></term>
514 <listitem>
515 <para>Used to determine system boot-up performance of the current
516 boot</para>
517 <indexterm zone="ch-system-systemd systemd-analyze">
518 <primary sortas="b-systemd-analyze">systemd-analyze</primary>
519 </indexterm>
520 </listitem>
521 </varlistentry>
522
523 <varlistentry id="systemd-ask-password">
524 <term><command>systemd-ask-password</command></term>
525 <listitem>
526 <para>Used to query a system password or passphrase from the user,
527 using a question message specified on the command line</para>
528 <indexterm zone="ch-system-systemd systemd-ask-password">
529 <primary sortas="b-systemd-ask-password">systemd-ask-password</primary>
530 </indexterm>
531 </listitem>
532 </varlistentry>
533
534 <varlistentry id="systemd-cat">
535 <term><command>systemd-cat</command></term>
536 <listitem>
537 <para>Used to connect STDOUT and STDERR of a process with the Journal
538 </para>
539 <indexterm zone="ch-system-systemd systemd-cat">
540 <primary sortas="b-systemd-cat">systemd-cat</primary>
541 </indexterm>
542 </listitem>
543 </varlistentry>
544
545 <varlistentry id="systemd-cgls">
546 <term><command>systemd-cgls</command></term>
547 <listitem>
548 <para>Recursively shows the contents of the selected Linux control
549 group hierarchy in a tree</para>
550 <indexterm zone="ch-system-systemd systemd-cgls">
551 <primary sortas="b-systemd-cgls">systemd-cgls</primary>
552 </indexterm>
553 </listitem>
554 </varlistentry>
555
556 <varlistentry id="systemd-cgtop">
557 <term><command>systemd-cgtop</command></term>
558 <listitem>
559 <para>Shows the top control groups of the local Linux control group
560 hierarchy, ordered by their CPU, memory and disk I/O load</para>
561 <indexterm zone="ch-system-systemd systemd-cgtop">
562 <primary sortas="b-systemd-cgtop">systemd-cgtop</primary>
563 </indexterm>
564 </listitem>
565 </varlistentry>
566
567 <varlistentry id="systemd-delta">
568 <term><command>systemd-delta</command></term>
569 <listitem>
570 <para>Used to identify and compare configuration files in
571 <filename class="directory">/etc</filename> that override default
572 counterparts in <filename class="directory">/usr</filename></para>
573 <indexterm zone="ch-system-systemd systemd-delta">
574 <primary sortas="b-systemd-delta">systemd-delta</primary>
575 </indexterm>
576 </listitem>
577 </varlistentry>
578
579 <varlistentry id="systemd-detect-virt">
580 <term><command>systemd-detect-virt</command></term>
581 <listitem>
582 <para>Detects execution in a virtualized environment</para>
583 <indexterm zone="ch-system-systemd systemd-detect-virt">
584 <primary sortas="b-systemd-detect-virt">systemd-detect-virt</primary>
585 </indexterm>
586 </listitem>
587 </varlistentry>
588
589 <varlistentry id="systemd-escape">
590 <term><command>systemd-escape</command></term>
591 <listitem>
592 <para>Used to escape strings for inclusion in systemd unit
593 names</para>
594 <indexterm zone="ch-system-systemd systemd-escape">
595 <primary sortas="b-systemd-escape">systemd-escape</primary>
596 </indexterm>
597 </listitem>
598 </varlistentry>
599
600 <varlistentry id="systemd-hwdb">
601 <term><command>systemd-hwdb</command></term>
602 <listitem>
603 <para>Used to manage hardware database (hwdb)</para>
604 <indexterm zone="ch-system-systemd systemd-hwdb">
605 <primary sortas="b-systemd-hwdb">systemd-hwdb</primary>
606 </indexterm>
607 </listitem>
608 </varlistentry>
609
610 <varlistentry id="systemd-id128">
611 <term><command>systemd-id128</command></term>
612 <listitem>
613 <para>Generate and print id128 strings</para>
614 <indexterm zone="ch-system-systemd systemd-id128">
615 <primary sortas="b-systemd-id128">systemd-id128</primary>
616 </indexterm>
617 </listitem>
618 </varlistentry>
619
620 <varlistentry id="systemd-inhibit">
621 <term><command>systemd-inhibit</command></term>
622 <listitem>
623 <para>Used to execute a program with a shutdown, sleep or idle
624 inhibitor lock taken</para>
625 <indexterm zone="ch-system-systemd systemd-inhibit">
626 <primary sortas="b-systemd-inhibit">systemd-inhibit</primary>
627 </indexterm>
628 </listitem>
629 </varlistentry>
630
631 <varlistentry id="systemd-machine-id-setup">
632 <term><command>systemd-machine-id-setup</command></term>
633 <listitem>
634 <para>Used by system installer tools to initialize the machine ID
635 stored in <filename>/etc/machine-id</filename> at install time with a
636 randomly generated ID</para>
637 <indexterm zone="ch-system-systemd systemd-machine-id-setup">
638 <primary sortas="b-systemd-machine-id-setup">systemd-machine-id-setup</primary>
639 </indexterm>
640 </listitem>
641 </varlistentry>
642
643 <varlistentry id="systemd-mount">
644 <term><command>systemd-mount</command></term>
645 <listitem>
646 <para>A tool to temporarily mount or auto-mount a drive.</para>
647 <indexterm zone="ch-system-systemd systemd-mount">
648 <primary sortas="b-systemd-mount">systemd-mount</primary>
649 </indexterm>
650 </listitem>
651 </varlistentry>
652
653 <varlistentry id="systemd-notify">
654 <term><command>systemd-notify</command></term>
655 <listitem>
656 <para>Used by daemon scripts to notify the init system about status
657 changes</para>
658 <indexterm zone="ch-system-systemd systemd-notify">
659 <primary sortas="b-systemd-notify">systemd-notify</primary>
660 </indexterm>
661 </listitem>
662 </varlistentry>
663
664 <varlistentry id="systemd-nspawn">
665 <term><command>systemd-nspawn</command></term>
666 <listitem>
667 <para>Used to run a command or OS in a light-weight namespace
668 container</para>
669 <indexterm zone="ch-system-systemd systemd-nspawn">
670 <primary sortas="b-systemd-nspawn">systemd-nspawn</primary>
671 </indexterm>
672 </listitem>
673 </varlistentry>
674
675 <varlistentry id="systemd-path">
676 <term><command>systemd-path</command></term>
677 <listitem>
678 <para>Used to query system and user paths</para>
679 <indexterm zone="ch-system-systemd systemd-path">
680 <primary sortas="b-systemd-path">systemd-path</primary>
681 </indexterm>
682 </listitem>
683 </varlistentry>
684
685 <varlistentry id="systemd-repart">
686 <term><command>systemd-repart</command></term>
687 <listitem>
688 <para>Used go grow and add partitions to a partition table when
689 systemd is used in an OS image (e.g. a container).</para>
690 <indexterm zone="ch-system-systemd systemd-repart">
691 <primary sortas="b-systemd-repart">systemd-repart</primary>
692 </indexterm>
693 </listitem>
694 </varlistentry>
695
696 <varlistentry id="systemd-resolve">
697 <term><command>systemd-resolve</command></term>
698 <listitem>
699 <para>Used to resolve domain names, IPV4 and IPv6 addresses, DNS
700 resource records, and services</para>
701 <indexterm zone="ch-system-systemd systemd-resolve">
702 <primary sortas="b-systemd-resolve">systemd-resolve</primary>
703 </indexterm>
704 </listitem>
705 </varlistentry>
706
707 <varlistentry id="systemd-run">
708 <term><command>systemd-run</command></term>
709 <listitem>
710 <para>Used to create and start a transient .service or a .scope unit
711 and run the specified command in it</para>
712 <indexterm zone="ch-system-systemd systemd-run">
713 <primary sortas="b-systemd-run">systemd-run</primary>
714 </indexterm>
715 </listitem>
716 </varlistentry>
717
718 <!-- <varlistentry id="systemd-stdio-bridge">
719 <term><command>systemd-stdio-bridge</command></term>
720 <listitem>
721 <para>To be completed</para>
722 <indexterm zone="ch-system-systemd systemd-stdio-bridge">
723 <primary sortas="b-systemd-stdio-bridge">systemd-stdio-bridge</primary>
724 </indexterm>
725 </listitem>
726 </varlistentry> -->
727
728 <varlistentry id="systemd-socket-activate">
729 <term><command>systemd-socket-activate</command></term>
730 <listitem>
731 <para>A tool to listen on socket devices and launch a process upon
732 connection.</para>
733 <indexterm zone="ch-system-systemd systemd-socket-activate">
734 <primary sortas="b-systemd-socket-activate">systemd-socket-activate</primary>
735 </indexterm>
736 </listitem>
737 </varlistentry>
738
739 <varlistentry id="systemd-tmpfiles">
740 <term><command>systemd-tmpfiles</command></term>
741 <listitem>
742 <para>Creates, deletes and cleans up volatile and temporary files and
743 directories, based on the configuration file format and location
744 specified in
745 <filename class="directory">tmpfiles.d</filename> directories</para>
746 <indexterm zone="ch-system-systemd systemd-tmpfiles">
747 <primary sortas="b-systemd-tmpfiles">systemd-tmpfiles</primary>
748 </indexterm>
749 </listitem>
750 </varlistentry>
751
752 <varlistentry id="systemd-umount">
753 <term><command>systemd-umount</command></term>
754 <listitem>
755 <para>Unmount mount points</para>
756 <indexterm zone="ch-system-systemd systemd-umount">
757 <primary sortas="b-systemd-umount">systemd-umount</primary>
758 </indexterm>
759 </listitem>
760 </varlistentry>
761
762 <varlistentry id="systemd-tty-ask-password-agent">
763 <term><command>systemd-tty-ask-password-agent</command></term>
764 <listitem>
765 <para>Used to list or process pending systemd password requests</para>
766 <indexterm zone="ch-system-systemd systemd-tty-ask-password-agent">
767 <primary sortas="b-systemd-tty-ask-password-agent">systemd-tty-ask-password-agent</primary>
768 </indexterm>
769 </listitem>
770 </varlistentry>
771
772 <varlistentry id="telinit">
773 <term><command>telinit</command></term>
774 <listitem>
775 <para>Tells <command>init</command> which run-level to change
776 to</para>
777 <indexterm zone="ch-system-systemd telinit">
778 <primary sortas="b-telinit">telinit</primary>
779 </indexterm>
780 </listitem>
781 </varlistentry>
782
783 <varlistentry id="timedatectl">
784 <term><command>timedatectl</command></term>
785 <listitem>
786 <para>Used to query and change the system clock and its settings
787 </para>
788 <indexterm zone="ch-system-systemd timedatectl">
789 <primary sortas="b-timedatectl">timedatectl</primary>
790 </indexterm>
791 </listitem>
792 </varlistentry>
793
794 <varlistentry id="udevadm">
795 <term><command>udevadm</command></term>
796 <listitem>
797 <para>Generic udev administration tool: controls the udevd daemon,
798 provides info from the Udev database, monitors uevents, waits for
799 uevents to finish, tests udev configuration, and triggers uevents
800 for a given device</para>
801 <indexterm zone="ch-system-systemd udevadm">
802 <primary sortas="b-udevadm">udevadm</primary>
803 </indexterm>
804 </listitem>
805 </varlistentry>
806
807 <varlistentry id="libsystemd">
808 <term><filename class="libraryfile">libsystemd</filename></term>
809 <listitem>
810 <para>The main systemd utility library</para>
811 <indexterm zone="ch-system-systemd libsystemd">
812 <primary sortas="c-libsystemd">libsystemd</primary>
813 </indexterm>
814 </listitem>
815 </varlistentry>
816
817 <varlistentry id="libudev">
818 <term><filename class="libraryfile">libudev</filename></term>
819 <listitem>
820 <para>A library to access Udev device information</para>
821 <indexterm zone="ch-system-systemd libudev">
822 <primary sortas="c-libudev">libudev</primary>
823 </indexterm>
824 </listitem>
825 </varlistentry>
826
827 </variablelist>
828
829 </sect2>
830
831</sect1>
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