source: chapter08/systemd.xml@ 6d19228

11.1 11.1-rc1 11.2 11.2-rc1 11.3 11.3-rc1 12.0 12.0-rc1 12.1 12.1-rc1 arm bdubbs/gcc13 multilib renodr/libudev-from-systemd s6-init trunk xry111/arm64 xry111/arm64-12.0 xry111/clfs-ng xry111/lfs-next xry111/loongarch xry111/loongarch-12.0 xry111/loongarch-12.1 xry111/mips64el xry111/pip3 xry111/rust-wip-20221008 xry111/update-glibc
Last change on this file since 6d19228 was 6d19228, checked in by Douglas R. Reno <renodr@…>, 2 years ago

Package Updates:

Update to systemd-250 (BLFS coming shortly)
Update to meson-0.60.3
Kernel Configuration: Enable the framebuffer since it's disabled by
default in Linux-5.15.
Kernel Configuration: Add a note about CONFIG_DEFAULT_HOSTNAME on
systemd.

  • Property mode set to 100644
File size: 31.8 KB
Line 
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-fin-sbu;</seg>
35 <seg>&systemd-fin-du;</seg>
36 </seglistitem>
37 </segmentedlist>
38 </sect2>
39
40 <sect2 role="installation">
41 <title>Installation of systemd</title>
42
43 <!--Fix CVE-2021-33910 -->
44 <!--
45 <para>First, apply a patch to fix a security vulnerability:</para>
46
47<screen><userinput remap="pre">patch -Np1 -i ../systemd-&systemd-version;-upstream_fixes-1.patch</userinput></screen>
48-->
49
50 <para>Remove two unneeded groups,
51 <systemitem class="groupname">render</systemitem> and
52 <systemitem class="groupname">sgx</systemitem>, from the default udev
53 rules:</para>
54
55 <screen><userinput remap="pre">sed -i -e 's/GROUP="render"/GROUP="video"/' \
56 -e 's/GROUP="sgx", //' rules.d/50-udev-default.rules.in</userinput></screen>
57
58 <para>Prepare systemd for compilation:</para>
59
60<screen><userinput remap="configure">mkdir -p build
61cd build
62
63LANG=en_US.UTF-8 \
64meson --prefix=/usr \
65 --sysconfdir=/etc \
66 --localstatedir=/var \
67 --buildtype=release \
68 -Dblkid=true \
69 -Ddefault-dnssec=no \
70 -Dfirstboot=false \
71 -Dinstall-tests=false \
72 -Dldconfig=false \
73 -Dsysusers=false \
74 -Db_lto=false \
75 -Drpmmacrosdir=no \
76 -Dhomed=false \
77 -Duserdb=false \
78 -Dman=false \
79 -Dmode=release \
80 -Ddocdir=/usr/share/doc/systemd-&systemd-version; \
81 ..</userinput></screen>
82
83 <variablelist>
84 <title>The meaning of the meson options:</title>
85
86 <varlistentry>
87 <term><parameter>--buildtype=release</parameter></term>
88 <listitem>
89 <para>This switch overrides the default buildtype
90 (<quote>debug</quote>), which would produce unoptimized
91 binaries.</para>
92 </listitem>
93 </varlistentry>
94
95 <varlistentry>
96 <term><parameter>-Ddefault-dnssec=no</parameter></term>
97 <listitem>
98 <para>This switch turns off the experimental DNSSEC support.</para>
99 </listitem>
100 </varlistentry>
101
102 <varlistentry>
103 <term><parameter>-Dfirstboot=false</parameter></term>
104 <listitem>
105 <para>This switch prevents installation of systemd
106 services responsible for setting up the system for
107 the first time. They are not useful for LFS because
108 everything is done manually.</para>
109 </listitem>
110 </varlistentry>
111
112 <varlistentry>
113 <term><parameter>-Dinstall-tests=false</parameter></term>
114 <listitem>
115 <para>This switch prevents installation of the compiled tests.</para>
116 </listitem>
117 </varlistentry>
118
119 <varlistentry>
120 <term><parameter>-Dldconfig=false</parameter></term>
121 <listitem>
122 <para>This switch prevents installation of a systemd unit that runs
123 <command>ldconfig</command> at boot, which is not useful for source
124 distributions such as LFS and makes the boot time longer. Remove it
125 if the described feature is desired.</para>
126 </listitem>
127 </varlistentry>
128
129 <varlistentry>
130 <term><parameter>-Dsysusers=false</parameter></term>
131 <listitem>
132 <para>This switch prevents installation of systemd
133 services responsible for setting up the
134 <filename>/etc/group</filename> and
135 <filename>/etc/passwd</filename> files. Both files
136 were created earlier in this chapter.</para>
137 </listitem>
138 </varlistentry>
139
140 <varlistentry>
141 <term><parameter>-Drpmmacrosdir=no</parameter></term>
142 <listitem>
143 <para>This switch disables installation of RPM Macros
144 for use with systemd because LFS does not support RPM.</para>
145 </listitem>
146 </varlistentry>
147
148 <varlistentry>
149 <term><parameter>-D{userdb,homed}=false</parameter></term>
150 <listitem>
151 <para>Remove two daemons that have dependencies that do not fit
152 the scope of LFS.</para>
153 </listitem>
154 </varlistentry>
155
156 <varlistentry>
157 <term><parameter>-Dman=false</parameter></term>
158 <listitem>
159 <para>Prevent the generation of man pages to avoid extra
160 dependencies. We will install pre-generated man pages for systemd
161 from a tarball later.</para>
162 </listitem>
163 </varlistentry>
164
165 <varlistentry>
166 <term><parameter>-Dmode=release</parameter></term>
167 <listitem>
168 <para>Disable some features considered experimental by upstream.
169 </para>
170 </listitem>
171 </varlistentry>
172
173 </variablelist>
174
175 <para>Compile the package:</para>
176
177<screen><userinput remap="make">LANG=en_US.UTF-8 ninja</userinput></screen>
178
179 <para>Install the package:</para>
180
181<screen><userinput remap="install">LANG=en_US.UTF-8 ninja install</userinput></screen>
182
183 <para>Install the man pages:</para>
184
185<screen><userinput remap="install">tar -xf ../../systemd-man-pages-&systemd-man-version;.tar.xz --strip-components=1 -C /usr/share/man</userinput></screen>
186
187 <para>Remove a useless directory:</para>
188
189<screen><userinput remap="install">rm -rf /usr/lib/pam.d</userinput></screen>
190
191 <para>Create the <filename>/etc/machine-id</filename> file needed by
192 <command>systemd-journald</command>:</para>
193
194<screen><userinput remap="adjust">systemd-machine-id-setup</userinput></screen>
195
196 <para>Setup the basic target structure:</para>
197
198<screen><userinput remap="adjust">systemctl preset-all</userinput></screen>
199
200 <para>Disable a service that is known to cause problems with systems that
201 use a network configuration other than what is provided by
202 systemd-networkd:</para>
203 <!-- Observed halting startup with dhcpcd handling the primary NIC -->
204
205<screen><userinput remap="adjust">systemctl disable systemd-time-wait-sync.service</userinput></screen>
206
207 <para>Fix a regression in a systemd unit that causes a delay when
208 switching TTYs:</para>
209
210<screen><userinput remap="adjust">sed -i 's/idle/simple/' /usr/lib/systemd/system/getty@.service</userinput></screen>
211
212<!-- dev: 50-pid-max.conf is not removed in BLFS, so I commented the following out.
213 If it causes any trouble, we can add this back and also copy it into BLFS -->
214<!--
215 <para>Prevent systemd from resetting the maximum PID value which causes
216 some problems with packages and units in BLFS:</para>
217
218<screen><userinput remap="adjust">rm -f /usr/lib/sysctl.d/50-pid-max.conf</userinput></screen>
219-->
220
221 </sect2>
222
223 <sect2 id="contents-systemd" role="content">
224 <title>Contents of systemd</title>
225
226 <segmentedlist>
227 <segtitle>Installed programs</segtitle>
228 <segtitle>Installed libraries</segtitle>
229 <segtitle>Installed directories</segtitle>
230
231 <seglistitem>
232 <seg>bootctl, busctl, coredumpctl, halt (symlink to systemctl),
233 hostnamectl, init, journalctl, kernel-install, localectl, loginctl,
234 machinectl, networkctl, oomctl, portablectl, poweroff (symlink to
235 systemctl), reboot (symlink to systemctl), resolvconf (symlink to
236 resolvectl), resolvectl, runlevel (symlink to systemctl), shutdown
237 (symlink to systemctl), systemctl, systemd-analyze,
238 systemd-ask-password, systemd-cat, systemd-cgls, systemd-cgtop,
239 systemd-cryptenroll, systemd-delta, systemd-detect-virt,
240 systemd-dissect, systemd-escape, systemd-hwdb, systemd-id128,
241 systemd-inhibit, systemd-machine-id-setup,
242 systemd-mount, systemd-notify, systemd-nspawn, systemd-path,
243 systemd-repart, systemd-resolve (symlink to resolvectl), systemd-run,
244 systemd-socket-activate, systemd-stdio-bridge, systemd-sysext,
245 systemd-tmpfiles, systemd-tty-ask-password-agent,
246 systemd-umount (symlink to systemd-mount),
247 telinit (symlink to systemctl), timedatectl, and udevadm</seg>
248 <seg>libnss_myhostname.so.2, libnss_mymachines.so.2,
249 libnss_resolve.so.2, libnss_systemd.so.2,
250 libsystemd.so, libsystemd-shared-&systemd-version;.so (in /usr/lib/systemd),
251 and libudev.so</seg>
252 <seg>/etc/binfmt.d, /etc/init.d, /etc/kernel, /etc/modules-load.d,
253 /etc/sysctl.d, /etc/systemd, /etc/tmpfiles.d, /etc/udev,
254 /etc/xdg/systemd, /usr/lib/systemd, /usr/lib/udev, /usr/include/systemd,
255 /usr/lib/binfmt.d, /usr/lib/environment.d, /usr/lib/kernel,
256 /usr/lib/modules-load.d, /usr/lib/sysctl.d, /usr/lib/systemd,
257 /usr/lib/tmpfiles.d,
258 /usr/share/doc/systemd-&systemd-version;, /usr/share/factory,
259 /usr/share/systemd, /var/lib/systemd, and /var/log/journal</seg>
260 </seglistitem>
261 </segmentedlist>
262
263 <variablelist>
264 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
265 <?dbfo list-presentation="list"?>
266 <?dbhtml list-presentation="table"?>
267
268 <varlistentry id="bootctl">
269 <term><command>bootctl</command></term>
270 <listitem>
271 <para>Is used to query the firmware and boot manager settings</para>
272 <indexterm zone="ch-system-systemd bootctl">
273 <primary sortas="b-bootctl">bootctl</primary>
274 </indexterm>
275 </listitem>
276 </varlistentry>
277
278 <varlistentry id="busctl">
279 <term><command>busctl</command></term>
280 <listitem>
281 <para>Is used to introspect and monitor the D-Bus bus</para>
282 <indexterm zone="ch-system-systemd busctl">
283 <primary sortas="b-busctl">busctl</primary>
284 </indexterm>
285 </listitem>
286 </varlistentry>
287
288 <varlistentry id="coredumpctl">
289 <term><command>coredumpctl</command></term>
290 <listitem>
291 <para>Is used to retrieve coredumps from the systemd journal</para>
292 <indexterm zone="ch-system-systemd coredumpctl">
293 <primary sortas="b-coredumpctl">coredumpctl</primary>
294 </indexterm>
295 </listitem>
296 </varlistentry>
297
298 <varlistentry id="halt">
299 <term><command>halt</command></term>
300 <listitem>
301 <para>Normally invokes <command>shutdown</command> with the
302 <parameter>-h</parameter> option, except when already in run-level 0,
303 then it tells the kernel to halt the system; it notes in the
304 file <filename>/var/log/wtmp</filename> that the system is being
305 brought down</para>
306 <indexterm zone="ch-system-systemd halt">
307 <primary sortas="b-halt">halt</primary>
308 </indexterm>
309 </listitem>
310 </varlistentry>
311
312 <varlistentry id="hostnamectl">
313 <term><command>hostnamectl</command></term>
314 <listitem>
315 <para>Is used to query and change the system hostname and related
316 settings</para>
317 <indexterm zone="ch-system-systemd hostnamectl">
318 <primary sortas="b-hostnamectl">hostnamectl</primary>
319 </indexterm>
320 </listitem>
321 </varlistentry>
322
323 <varlistentry id="init">
324 <term><command>init</command></term>
325 <listitem>
326 <para>Is the first process to be started when the kernel has initialized
327 the hardware which takes over the boot process and starts all
328 processes according to its configuration files. In this case, it starts
329 systemd</para>
330 <indexterm zone="ch-system-systemd init">
331 <primary sortas="b-init">init</primary>
332 </indexterm>
333 </listitem>
334 </varlistentry>
335
336 <varlistentry id="journalctl">
337 <term><command>journalctl</command></term>
338 <listitem>
339 <para>Is used to query the contents of the systemd journal</para>
340 <indexterm zone="ch-system-systemd journalctl">
341 <primary sortas="b-journalctl">journalctl</primary>
342 </indexterm>
343 </listitem>
344 </varlistentry>
345
346 <varlistentry id="kernel-install">
347 <term><command>kernel-install</command></term>
348 <listitem>
349 <para>Is used to add and remove kernel and initramfs images to and
350 from /boot. In LFS, this is done manually</para>
351 <indexterm zone="ch-system-systemd kernel-install">
352 <primary sortas="b-kernel-install">kernel-install</primary>
353 </indexterm>
354 </listitem>
355 </varlistentry>
356
357 <varlistentry id="localectl">
358 <term><command>localectl</command></term>
359 <listitem>
360 <para>Is used to query and change the system locale and keyboard layout
361 settings</para>
362 <indexterm zone="ch-system-systemd localectl">
363 <primary sortas="b-localectl">localectl</primary>
364 </indexterm>
365 </listitem>
366 </varlistentry>
367
368 <varlistentry id="loginctl">
369 <term><command>loginctl</command></term>
370 <listitem>
371 <para>Is used to introspect and control the state of the systemd Login
372 Manager</para>
373 <indexterm zone="ch-system-systemd loginctl">
374 <primary sortas="b-loginctl">loginctl</primary>
375 </indexterm>
376 </listitem>
377 </varlistentry>
378
379 <varlistentry id="machinectl">
380 <term><command>machinectl</command></term>
381 <listitem>
382 <para>Is used to introspect and control the state of the systemd Virtual
383 Machine and Container Registration Manager</para>
384 <indexterm zone="ch-system-systemd machinectl">
385 <primary sortas="b-machinectl">machinectl</primary>
386 </indexterm>
387 </listitem>
388 </varlistentry>
389
390 <varlistentry id="networkctl">
391 <term><command>networkctl</command></term>
392 <listitem>
393 <para>Is used to introspect and configure the state of the network
394 links configured by systemd-networkd</para>
395 <indexterm zone="ch-system-systemd networkctl">
396 <primary sortas="b-networkctl">networkctl</primary>
397 </indexterm>
398 </listitem>
399 </varlistentry>
400
401 <varlistentry id="oomctl">
402 <term><command>oomctl</command></term>
403 <listitem>
404 <para>Controls the systemd Out Of Memory daemon</para>
405 <indexterm zone="ch-system-systemd oomctl">
406 <primary sortas="b-oomctl">oomctl</primary>
407 </indexterm>
408 </listitem>
409 </varlistentry>
410
411 <varlistentry id="portablectl">
412 <term><command>portablectl</command></term>
413 <listitem>
414 <para>Is used to attach or detach portable services from the local
415 system</para>
416 <indexterm zone="ch-system-systemd portablectl">
417 <primary sortas="b-portablectl">portablectl</primary>
418 </indexterm>
419 </listitem>
420 </varlistentry>
421
422 <varlistentry id="poweroff">
423 <term><command>poweroff</command></term>
424 <listitem>
425 <para>Instructs the kernel to halt the system and switch off the computer
426 (see <command>halt</command>)</para>
427 <indexterm zone="ch-system-systemd poweroff">
428 <primary sortas="b-poweroff">poweroff</primary>
429 </indexterm>
430 </listitem>
431 </varlistentry>
432
433 <varlistentry id="reboot">
434 <term><command>reboot</command></term>
435 <listitem>
436 <para>Instructs the kernel to reboot the system (see
437 <command>halt</command>)</para>
438 <indexterm zone="ch-system-systemd reboot">
439 <primary sortas="b-reboot">reboot</primary>
440 </indexterm>
441 </listitem>
442 </varlistentry>
443
444 <varlistentry id="resolvconf">
445 <term><command>resolvconf</command></term>
446 <listitem>
447 <para>Registers DNS server and domain configuration with
448 <command>systemd-resolved</command></para>
449 <indexterm zone="ch-system-systemd resolvconf">
450 <primary sortas="b-resolvconf">resolvconf</primary>
451 </indexterm>
452 </listitem>
453 </varlistentry>
454
455 <varlistentry id="resolvectl">
456 <term><command>resolvectl</command></term>
457 <listitem>
458 <para>Sends control commands to the network name resolution
459 manager, or resolves domain names, IPv4 and IPv6 addresses,
460 DNS records, and services</para>
461 <indexterm zone="ch-system-systemd resolvectl">
462 <primary sortas="b-resolvectl">resolvectl</primary>
463 </indexterm>
464 </listitem>
465 </varlistentry>
466
467 <varlistentry id="runlevel">
468 <term><command>runlevel</command></term>
469 <listitem>
470 <para>Outputs the previous and the current run-level, as noted in the
471 last run-level record in <filename>/run/utmp</filename></para>
472 <indexterm zone="ch-system-systemd runlevel">
473 <primary sortas="b-runlevel">runlevel</primary>
474 </indexterm>
475 </listitem>
476 </varlistentry>
477
478 <varlistentry id="shutdown">
479 <term><command>shutdown</command></term>
480 <listitem>
481 <para>Brings the system down in a safe and secure manner, signaling
482 all processes and notifying all logged-in users</para>
483 <indexterm zone="ch-system-systemd shutdown">
484 <primary sortas="b-shutdown">shutdown</primary>
485 </indexterm>
486 </listitem>
487 </varlistentry>
488
489 <varlistentry id="systemctl">
490 <term><command>systemctl</command></term>
491 <listitem>
492 <para>Is used to introspect and control the state of the systemd system
493 and service manager</para>
494 <indexterm zone="ch-system-systemd systemctl">
495 <primary sortas="b-systemctl">systemctl</primary>
496 </indexterm>
497 </listitem>
498 </varlistentry>
499
500 <varlistentry id="systemd-analyze">
501 <term><command>systemd-analyze</command></term>
502 <listitem>
503 <para>Is used to determine system startup performance of the current
504 boot, as well as identify troublesome systemd units</para>
505 <indexterm zone="ch-system-systemd systemd-analyze">
506 <primary sortas="b-systemd-analyze">systemd-analyze</primary>
507 </indexterm>
508 </listitem>
509 </varlistentry>
510
511 <varlistentry id="systemd-ask-password">
512 <term><command>systemd-ask-password</command></term>
513 <listitem>
514 <para>Is used to query a system password or passphrase from the user,
515 using a question message specified on the command line</para>
516 <indexterm zone="ch-system-systemd systemd-ask-password">
517 <primary sortas="b-systemd-ask-password">systemd-ask-password</primary>
518 </indexterm>
519 </listitem>
520 </varlistentry>
521
522 <varlistentry id="systemd-cat">
523 <term><command>systemd-cat</command></term>
524 <listitem>
525 <para>Is used to connect the STDOUT and STDERR outputs of a process
526 with the systemd journal
527 </para>
528 <indexterm zone="ch-system-systemd systemd-cat">
529 <primary sortas="b-systemd-cat">systemd-cat</primary>
530 </indexterm>
531 </listitem>
532 </varlistentry>
533
534 <varlistentry id="systemd-cgls">
535 <term><command>systemd-cgls</command></term>
536 <listitem>
537 <para>Recursively shows the contents of the selected Linux control
538 group hierarchy in a tree</para>
539 <indexterm zone="ch-system-systemd systemd-cgls">
540 <primary sortas="b-systemd-cgls">systemd-cgls</primary>
541 </indexterm>
542 </listitem>
543 </varlistentry>
544
545 <varlistentry id="systemd-cgtop">
546 <term><command>systemd-cgtop</command></term>
547 <listitem>
548 <para>Shows the top control groups of the local Linux control group
549 hierarchy, ordered by their CPU, memory and disk I/O load</para>
550 <indexterm zone="ch-system-systemd systemd-cgtop">
551 <primary sortas="b-systemd-cgtop">systemd-cgtop</primary>
552 </indexterm>
553 </listitem>
554 </varlistentry>
555
556 <varlistentry id="systemd-cryptenroll">
557 <term><command>systemd-cryptenroll</command></term>
558 <listitem>
559 <para>Is used to enroll or remove a system from full disk encryption,
560 as well as set and query private keys and recovery keys</para>
561 <indexterm zone="ch-system-systemd systemd-cryptenroll">
562 <primary sortas="b-systemd-cryptenroll">systemd-cryptenroll</primary>
563 </indexterm>
564 </listitem>
565 </varlistentry>
566
567 <varlistentry id="systemd-delta">
568 <term><command>systemd-delta</command></term>
569 <listitem>
570 <para>Is 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 whether the system is being run in a virtual
583 environment, and adjusts udev accordingly</para>
584 <indexterm zone="ch-system-systemd systemd-detect-virt">
585 <primary sortas="b-systemd-detect-virt">systemd-detect-virt</primary>
586 </indexterm>
587 </listitem>
588 </varlistentry>
589
590 <varlistentry id="systemd-dissect">
591 <term><command>systemd-dissect</command></term>
592 <listitem>
593 <para>Is used to inspect OS disk images</para>
594 <indexterm zone="ch-system-systemd systemd-dissect">
595 <primary sortas="b-systemd-dissect">systemd-dissect</primary>
596 </indexterm>
597 </listitem>
598 </varlistentry>
599
600 <varlistentry id="systemd-escape">
601 <term><command>systemd-escape</command></term>
602 <listitem>
603 <para>Is used to escape strings for inclusion in systemd unit
604 names</para>
605 <indexterm zone="ch-system-systemd systemd-escape">
606 <primary sortas="b-systemd-escape">systemd-escape</primary>
607 </indexterm>
608 </listitem>
609 </varlistentry>
610
611 <varlistentry id="systemd-hwdb">
612 <term><command>systemd-hwdb</command></term>
613 <listitem>
614 <para>Is used to manage the hardware database (hwdb)</para>
615 <indexterm zone="ch-system-systemd systemd-hwdb">
616 <primary sortas="b-systemd-hwdb">systemd-hwdb</primary>
617 </indexterm>
618 </listitem>
619 </varlistentry>
620
621 <varlistentry id="systemd-id128">
622 <term><command>systemd-id128</command></term>
623 <listitem>
624 <para>Generates and prints id128 strings</para>
625 <indexterm zone="ch-system-systemd systemd-id128">
626 <primary sortas="b-systemd-id128">systemd-id128</primary>
627 </indexterm>
628 </listitem>
629 </varlistentry>
630
631 <varlistentry id="systemd-inhibit">
632 <term><command>systemd-inhibit</command></term>
633 <listitem>
634 <para>Is used to execute a program with a shutdown, sleep or idle
635 inhibitor lock taken, preventing an action such as a system shutdown
636 until the process is completed</para>
637 <indexterm zone="ch-system-systemd systemd-inhibit">
638 <primary sortas="b-systemd-inhibit">systemd-inhibit</primary>
639 </indexterm>
640 </listitem>
641 </varlistentry>
642
643 <varlistentry id="systemd-machine-id-setup">
644 <term><command>systemd-machine-id-setup</command></term>
645 <listitem>
646 <para>Is used by system installer tools to initialize the machine ID
647 stored in <filename>/etc/machine-id</filename> at install time with a
648 randomly generated ID</para>
649 <indexterm zone="ch-system-systemd systemd-machine-id-setup">
650 <primary sortas="b-systemd-machine-id-setup">systemd-machine-id-setup</primary>
651 </indexterm>
652 </listitem>
653 </varlistentry>
654
655 <varlistentry id="systemd-mount">
656 <term><command>systemd-mount</command></term>
657 <listitem>
658 <para>Is used to temporarily mount or automount disks</para>
659 <indexterm zone="ch-system-systemd systemd-mount">
660 <primary sortas="b-systemd-mount">systemd-mount</primary>
661 </indexterm>
662 </listitem>
663 </varlistentry>
664
665 <varlistentry id="systemd-notify">
666 <term><command>systemd-notify</command></term>
667 <listitem>
668 <para>Is used by daemon scripts to notify the init system about status
669 changes</para>
670 <indexterm zone="ch-system-systemd systemd-notify">
671 <primary sortas="b-systemd-notify">systemd-notify</primary>
672 </indexterm>
673 </listitem>
674 </varlistentry>
675
676 <varlistentry id="systemd-nspawn">
677 <term><command>systemd-nspawn</command></term>
678 <listitem>
679 <para>Is used to run a command or OS in a light-weight namespace
680 container</para>
681 <indexterm zone="ch-system-systemd systemd-nspawn">
682 <primary sortas="b-systemd-nspawn">systemd-nspawn</primary>
683 </indexterm>
684 </listitem>
685 </varlistentry>
686
687 <varlistentry id="systemd-path">
688 <term><command>systemd-path</command></term>
689 <listitem>
690 <para>Is used to query system and user paths</para>
691 <indexterm zone="ch-system-systemd systemd-path">
692 <primary sortas="b-systemd-path">systemd-path</primary>
693 </indexterm>
694 </listitem>
695 </varlistentry>
696
697 <varlistentry id="systemd-repart">
698 <term><command>systemd-repart</command></term>
699 <listitem>
700 <para>Is used to grow and add partitions to a partition table when
701 systemd is used in an OS image (e.g. a container)</para>
702 <indexterm zone="ch-system-systemd systemd-repart">
703 <primary sortas="b-systemd-repart">systemd-repart</primary>
704 </indexterm>
705 </listitem>
706 </varlistentry>
707
708 <varlistentry id="systemd-resolve">
709 <term><command>systemd-resolve</command></term>
710 <listitem>
711 <para>Is used to resolve domain names, IPV4 and IPv6 addresses, DNS
712 resource records, and services</para>
713 <indexterm zone="ch-system-systemd systemd-resolve">
714 <primary sortas="b-systemd-resolve">systemd-resolve</primary>
715 </indexterm>
716 </listitem>
717 </varlistentry>
718
719 <varlistentry id="systemd-run">
720 <term><command>systemd-run</command></term>
721 <listitem>
722 <para>Is used to create and start a transient .service or a .scope
723 unit and run the specified command in it. This is useful for
724 validating systemd units</para>
725 <indexterm zone="ch-system-systemd systemd-run">
726 <primary sortas="b-systemd-run">systemd-run</primary>
727 </indexterm>
728 </listitem>
729 </varlistentry>
730
731 <varlistentry id="systemd-socket-activate">
732 <term><command>systemd-socket-activate</command></term>
733 <listitem>
734 <para>Is used to listen on socket devices and launch a process upon
735 a successful connection to the socket</para>
736 <indexterm zone="ch-system-systemd systemd-socket-activate">
737 <primary sortas="b-systemd-socket-activate">systemd-socket-activate</primary>
738 </indexterm>
739 </listitem>
740 </varlistentry>
741
742 <varlistentry id="systemd-sysext">
743 <term><command>systemd-sysext</command></term>
744 <listitem>
745 <para>Activates system extension images</para>
746 <indexterm zone="ch-system-systemd systemd-sysext">
747 <primary sortas="b-systemd-sysext">systemd-sysext</primary>
748 </indexterm>
749 </listitem>
750 </varlistentry>
751
752 <varlistentry id="systemd-tmpfiles">
753 <term><command>systemd-tmpfiles</command></term>
754 <listitem>
755 <para>Creates, deletes and cleans up volatile and temporary files and
756 directories, based on the configuration file format and location
757 specified in
758 <filename class="directory">tmpfiles.d</filename> directories</para>
759 <indexterm zone="ch-system-systemd systemd-tmpfiles">
760 <primary sortas="b-systemd-tmpfiles">systemd-tmpfiles</primary>
761 </indexterm>
762 </listitem>
763 </varlistentry>
764
765 <varlistentry id="systemd-umount">
766 <term><command>systemd-umount</command></term>
767 <listitem>
768 <para>Unmounts mount points</para>
769 <indexterm zone="ch-system-systemd systemd-umount">
770 <primary sortas="b-systemd-umount">systemd-umount</primary>
771 </indexterm>
772 </listitem>
773 </varlistentry>
774
775 <varlistentry id="systemd-tty-ask-password-agent">
776 <term><command>systemd-tty-ask-password-agent</command></term>
777 <listitem>
778 <para>Is used to list and/or process pending systemd password
779 requests</para>
780 <indexterm zone="ch-system-systemd systemd-tty-ask-password-agent">
781 <primary sortas="b-systemd-tty-ask-password-agent">systemd-tty-ask-password-agent</primary>
782 </indexterm>
783 </listitem>
784 </varlistentry>
785
786 <varlistentry id="telinit">
787 <term><command>telinit</command></term>
788 <listitem>
789 <para>Tells <command>init</command> which run-level to change
790 to</para>
791 <indexterm zone="ch-system-systemd telinit">
792 <primary sortas="b-telinit">telinit</primary>
793 </indexterm>
794 </listitem>
795 </varlistentry>
796
797 <varlistentry id="timedatectl">
798 <term><command>timedatectl</command></term>
799 <listitem>
800 <para>Is used to query and change the system clock and its settings
801 </para>
802 <indexterm zone="ch-system-systemd timedatectl">
803 <primary sortas="b-timedatectl">timedatectl</primary>
804 </indexterm>
805 </listitem>
806 </varlistentry>
807
808 <varlistentry id="udevadm">
809 <term><command>udevadm</command></term>
810 <listitem>
811 <para>Is a generic udev administration tool which controls the udevd
812 daemon, provides info from the Udev hardware database, monitors
813 uevents, waits for uevents to finish, tests udev configuration, and
814 triggers uevents for a given device</para>
815 <indexterm zone="ch-system-systemd udevadm">
816 <primary sortas="b-udevadm">udevadm</primary>
817 </indexterm>
818 </listitem>
819 </varlistentry>
820
821 <varlistentry id="libsystemd">
822 <term><filename class="libraryfile">libsystemd</filename></term>
823 <listitem>
824 <para>Is the main systemd utility library</para>
825 <indexterm zone="ch-system-systemd libsystemd">
826 <primary sortas="c-libsystemd">libsystemd</primary>
827 </indexterm>
828 </listitem>
829 </varlistentry>
830
831 <varlistentry id="libudev">
832 <term><filename class="libraryfile">libudev</filename></term>
833 <listitem>
834 <para>Is a library to access Udev device information</para>
835 <indexterm zone="ch-system-systemd libudev">
836 <primary sortas="c-libudev">libudev</primary>
837 </indexterm>
838 </listitem>
839 </varlistentry>
840
841 </variablelist>
842
843 </sect2>
844
845</sect1>
Note: See TracBrowser for help on using the repository browser.