source: chapter06/systemd.xml@ 61d3147

10.0 10.0-rc1 10.1 10.1-rc1 11.0 11.0-rc1 11.0-rc2 11.0-rc3 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 7.6 7.7 7.8 7.9 8.0 8.1 8.2 8.3 8.4 9.0 9.1 arm bdubbs/gcc13 ml-11.0 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 61d3147 was 61d3147, checked in by Bruce Dubbs <bdubbs@…>, 10 years ago

Update to gcc-4.9

git-svn-id: ​http://svn.linuxfromscratch.org/LFS/trunk/BOOK@10550 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689
  • Property mode set to 100644
File size: 23.8 KB
RevLine 
[f896e21c]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
[cba2d4e]8<sect1 id="ch-system-systemd" role="wrap">
9 <?dbhtml filename="systemd.html"?>
[f896e21c]10
11 <sect1info condition="script">
[cba2d4e]12 <productname>systemd</productname>
[f896e21c]13 <productnumber>&systemd-version;</productnumber>
14 <address>&systemd-url;</address>
15 </sect1info>
16
[cba2d4e]17 <title>Systemd-&systemd-version;</title>
[f896e21c]18
[cba2d4e]19 <indexterm zone="ch-system-systemd">
20 <primary sortas="a-Systemd">Systemd</primary>
[f896e21c]21 </indexterm>
22
23 <sect2 role="package">
24 <title/>
25
[cba2d4e]26 <para>The Systemd package contains programs for controlling the startup,
27 running, and shutdown of the system.</para>
[f896e21c]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">
[cba2d4e]41 <title>Installation of Systemd</title>
[f896e21c]42
[df37fa9]43 <note><para>If systemd is not desired at all, it can be skipped. However a
44 udev replacement must be installed. See the hint at <ulink
45 url="http://www.linuxfromscratch.org/hints/downloads/files/eudev-alt-hint.txt"/>
46 to find procedures to install
47 <application>eudev</application>.</para></note>
48
[cba2d4e]49 <para>First, create a file to allow Systemd to build when using Util-Linux
50 built in Chapter 5:</para>
[d7f2eb0]51
[cba2d4e]52<screen><userinput remap="pre">cat &gt; config.cache &lt;&lt; "EOF"
53<literal>KILL=/bin/kill
54HAVE_BLKID=1
55BLKID_LIBS="-lblkid"
[61d3147]56BLKID_CFLAGS="-I/tools/include/blkid"
57cc_cv_CFLAGS__flto=no</literal>
[cba2d4e]58EOF</userinput></screen>
[f896e21c]59
[85583fa8]60 <para>Additionally, fix a build error when using Util-Linux built in
[cba2d4e]61 Chapter 5:</para>
[f896e21c]62
[cba2d4e]63<screen><userinput remap="pre">sed -i "s:blkid/::" $(grep -rl "blkid/blkid.h")</userinput></screen>
[053b206]64
[cba2d4e]65 <para>Apply a patch so that compat <command>pkg-config</command> files get
66 installed without installing compat libs which are useless on LFS:</para>
[053b206]67
[cba2d4e]68<screen><userinput remap="pre">patch -Np1 -i ../&systemd-compat-patch;</userinput></screen>
[f896e21c]69
[cba2d4e]70 <para>Prepare Systemd for compilation:</para>
71
72<screen><userinput remap="configure">./configure --prefix=/usr \
73 --sysconfdir=/etc \
74 --localstatedir=/var \
75 --config-cache \
76 --with-rootprefix= \
77 --with-rootlibdir=/lib \
78 --enable-split-usr \
79 --disable-gudev \
80 --without-python \
81 --docdir=/usr/share/doc/systemd-&systemd-version; \
82 --with-dbuspolicydir=/etc/dbus-1/system.d \
83 --with-dbusinterfacedir=/usr/share/dbus-1/interfaces \
84 --with-dbussessionservicedir=/usr/share/dbus-1/services \
85 --with-dbussystemservicedir=/usr/share/dbus-1/system-services</userinput></screen>
86
87 <variablelist>
88 <title>The meaning of the configure options:</title>
89
90 <varlistentry>
91 <term><parameter>--config-cache</parameter></term>
92 <listitem>
93 <para>This switch tells the build system to use
94 the <filename>config.cache</filename> file which
95 was created earlier.</para>
96 </listitem>
97 </varlistentry>
98
99 <varlistentry>
100 <term><parameter>--with-root*</parameter></term>
101 <listitem>
102 <para>These switches ensure that core programs and
103 shared libraries are installed in the subdirectories
104 of the root partition.</para>
105 </listitem>
106 </varlistentry>
107
108 <varlistentry>
109 <term><parameter>--enable-split-usr</parameter></term>
110 <listitem>
111 <para>This switch ensures that Systemd will work on
112 systems where /bin, /lib and /sbin directories are not
113 symlinks to their /usr counterparts.</para>
114 </listitem>
115 </varlistentry>
116
117 <varlistentry>
118 <term><parameter>--disable-gudev --without-python</parameter></term>
119 <listitem>
120 <para>These switches disable optional features because
121 LFS does not provide their dependencies.</para>
122 </listitem>
123 </varlistentry>
124
125 <varlistentry>
126 <term><parameter>--with-dbus*</parameter></term>
127 <listitem>
128 <para>These switches ensure that D-Bus configuratil files
129 get installed in the correct locations.</para>
130 </listitem>
131 </varlistentry>
132
133 </variablelist>
134
135 <para>Compile the package:</para>
136
137<screen><userinput remap="make">make LIBRARY_PATH=/tools/lib</userinput></screen>
138
139 <para>First prevent few broken test cases from running:</para>
140
141<screen><userinput remap="test">sed -e "s:test/udev-test.pl::g" \
142 -e "s:test-bus-cleanup\$(EXEEXT) ::g" \
143 -e "s:test-bus-gvariant\$(EXEEXT) ::g" \
144 -i Makefile</userinput></screen>
145
146 <para>To test the results, issue:</para>
147
148<screen><userinput remap="test">make -k check</userinput></screen>
149
150 <para>Note that some tests might fail because the test are being run in a
151 chroot environment. For full test coverage, the test suite should be run
152 from a system booted using Systemd.</para>
[f896e21c]153
154 <para>Install the package:</para>
155
[cba2d4e]156<screen><userinput remap="install">make LD_LIBRARY_PATH=/tools/lib install</userinput></screen>
157
158 <para>Move NSS myhostname library to <filename
159 class="directory">/lib</filename>:</para>
160
161<screen><userinput remap="install">mv -v /usr/lib/libnss_myhostname.so.2 /lib</userinput></screen>
162
163 <para>Remove an unnecessary directory:</para>
164
165<screen><userinput remap="install">rm -rfv /usr/lib/rpm</userinput></screen>
[b7da138f]166
[cba2d4e]167 <para>Create the Sysvinit compatibility symlinks, and move some man pages
168 and a library that conflict with <xref linkend="ch-system-sysvinit"/> so
169 both systems can be installed side-by-side:</para>
[b7da138f]170
[cba2d4e]171<screen><userinput remap="install">for tool in runlevel reboot shutdown poweroff halt telinit; do
172 ln -sfv ../bin/systemctl /sbin/${tool}-systemd
173 mv -v /usr/share/man/man8/${tool}.8 /usr/share/man/man8/${tool}-systemd.8
174done
[b7da138f]175
[cba2d4e]176ln -sfv ../lib/systemd/systemd /sbin/init-systemd
177mv -v /etc/init.d /etc/init.d-systemd</userinput></screen>
[d29a03b]178
[cba2d4e]179 <para>Remove a reference to a non-existent group:</para>
[d29a03b]180
[cba2d4e]181<screen><userinput remap="install">sed -i "s:0775 root lock:0755 root root:g" /usr/lib/tmpfiles.d/legacy.conf</userinput></screen>
[053b206]182
[cba2d4e]183 <para>Create the <filename>/etc/machine-id</filename> file needed by
184 Journald:</para>
[053b206]185
[cba2d4e]186<screen><userinput remap="install">systemd-machine-id-setup</userinput></screen>
187
188 <para>Finally install some LFS specific udev rules:</para>
189
190<screen><userinput remap="install">tar -xf ../&udev-lfs-version;.tar.bz2
191make -f &udev-lfs-version;/Makefile.lfs install</userinput></screen>
[053b206]192
[f896e21c]193 </sect2>
194
[cba2d4e]195 <sect2 id="contents-systemd" role="content">
196 <title>Contents of Systemd</title>
[f896e21c]197
198 <segmentedlist>
199 <segtitle>Installed programs</segtitle>
200 <segtitle>Installed libraries</segtitle>
201 <segtitle>Installed directories</segtitle>
202
203 <seglistitem>
[cba2d4e]204 <seg>bootctl, busctl, halt, hostnamectl, init, journalctl, kernel-install,
205 localectl, loginctl, machinectl, poweroff, reboot, runlevel, shutdown,
206 systemctl, systemd-analyze, systemd-ask-password, systemd-cat, systemd-cgls,
207 systemd-cgtop, systemd-coredumpctl, systemd-delta, systemd-detect-virt,
208 systemd-inhibit, systemd-machine-id-setup, systemd-notify, systemd-nspawn,
209 systemd-run, systemd-stdio-bridge, systemd-tmpfiles, systemd-tty-ask-password-agent,
210 telinit, timedatectl, and udevadm</seg>
211
212 <seg>libnss_myhostname.so.2, libsystemd.so, libudev.so</seg>
213 <seg>/etc/binfmt.d, /etc/init.d, /etc/kernel, /etc/modules-load.d,
214 /etc/sysctl.d, /etc/systemd, /etc/tmpfiles.d, /etc/udev,
215 /etc/xdg/systemd, /lib/systemd, /lib/udev, /usr/include/systemd,
216 /usr/lib/binfmt.d, /usr/lib/kernel, /usr/lib/modules-load.d,
217 /usr/lib/sysctl.d, /usr/lib/systemd, /usr/lib/tmpfiles.d,
218 /usr/share/doc/systemd-&systemd-version;, /usr/share/systemd,
219 /var/lib/systemd, /var/log/journal</seg>
[f896e21c]220 </seglistitem>
221 </segmentedlist>
222
223 <variablelist>
224 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
225 <?dbfo list-presentation="list"?>
226 <?dbhtml list-presentation="table"?>
227
[cba2d4e]228 <varlistentry id="bootctl">
229 <term><command>bootctl</command></term>
230 <listitem>
231 <para>used to query the firmware and boot manager settings.</para>
232 <indexterm zone="ch-system-systemd bootctl">
233 <primary sortas="b-bootctl">bootctl</primary>
234 </indexterm>
235 </listitem>
236 </varlistentry>
237
238 <varlistentry id="busctl">
239 <term><command>busctl</command></term>
240 <listitem>
241 <para>used to introspect and monitor the D-Bus bus.</para>
242 <indexterm zone="ch-system-systemd busctl">
243 <primary sortas="b-busctl">busctl</primary>
244 </indexterm>
245 </listitem>
246 </varlistentry>
247
248 <varlistentry id="halt">
249 <term><command>halt</command></term>
250 <listitem>
251 <para>Normally invokes <command>shutdown</command> with the
252 <parameter>-h</parameter> option, except when already in run-level 0,
253 then it tells the kernel to halt the system; it notes in the
254 file <filename>/var/log/wtmp</filename> that the system is being
255 brought down.</para>
256 <indexterm zone="ch-system-systemd halt">
257 <primary sortas="b-halt">halt</primary>
258 </indexterm>
259 </listitem>
260 </varlistentry>
261
262 <varlistentry id="hostnamectl">
263 <term><command>hostnamectl</command></term>
264 <listitem>
265 <para>used to query and change the system hostname and related
266 settings.</para>
267 <indexterm zone="ch-system-systemd hostnamectl">
268 <primary sortas="b-hostnamectl">hostnamectl</primary>
269 </indexterm>
270 </listitem>
271 </varlistentry>
272
273 <varlistentry id="init">
274 <term><command>init</command></term>
275 <listitem>
276 <para>The first process to be started when the kernel has initialized
277 the hardware which takes over the boot process and starts all the
278 proceses it is instructed to.</para>
279 <indexterm zone="ch-system-systemd init">
280 <primary sortas="b-init">init</primary>
281 </indexterm>
282 </listitem>
283 </varlistentry>
284
285 <varlistentry id="journalctl">
286 <term><command>journalctl</command></term>
287 <listitem>
288 <para>used to query the contents of the Systemd Journal.</para>
289 <indexterm zone="ch-system-systemd journalctl">
290 <primary sortas="b-journalctl">journalctl</primary>
291 </indexterm>
292 </listitem>
293 </varlistentry>
294
295 <varlistentry id="kernel-install">
296 <term><command>kernel-install</command></term>
297 <listitem>
298 <para>used to add and remove kernel and initramfs images to and
299 from /boot.</para>
300 <indexterm zone="ch-system-systemd kernel-install">
301 <primary sortas="b-kernel-install">kernel-install</primary>
302 </indexterm>
303 </listitem>
304 </varlistentry>
305
306 <varlistentry id="localectl">
307 <term><command>localectl</command></term>
308 <listitem>
309 <para>used to query and change the system locale and keyboard layout
310 settings.</para>
311 <indexterm zone="ch-system-systemd localectl">
312 <primary sortas="b-localectl">localectl</primary>
313 </indexterm>
314 </listitem>
315 </varlistentry>
316
317 <varlistentry id="loginctl">
318 <term><command>loginctl</command></term>
319 <listitem>
320 <para>used to introspect and control the state of the Systemd Login
321 Manager.</para>
322 <indexterm zone="ch-system-systemd loginctl">
323 <primary sortas="b-loginctl">loginctl</primary>
324 </indexterm>
325 </listitem>
326 </varlistentry>
327
328 <varlistentry id="machinectl">
329 <term><command>machinectl</command></term>
330 <listitem>
331 <para>used to introspect and control the state of the Systemd Virtual
332 Machine and Container Registration Manager</para>
333 <indexterm zone="ch-system-systemd machinectl">
334 <primary sortas="b-machinectl">machinectl</primary>
335 </indexterm>
336 </listitem>
337 </varlistentry>
338
339 <varlistentry id="poweroff">
340 <term><command>poweroff</command></term>
341 <listitem>
342 <para>Tells the kernel to halt the system and switch off the computer
343 (see <command>halt</command>).</para>
344 <indexterm zone="ch-system-systemd poweroff">
345 <primary sortas="b-poweroff">poweroff</primary>
346 </indexterm>
347 </listitem>
348 </varlistentry>
349
350 <varlistentry id="reboot">
351 <term><command>reboot</command></term>
[f896e21c]352 <listitem>
[cba2d4e]353 <para>Tells the kernel to reboot the system (see
354 <command>halt</command>).</para>
355 <indexterm zone="ch-system-systemd reboot">
356 <primary sortas="b-reboot">reboot</primary>
[f896e21c]357 </indexterm>
358 </listitem>
359 </varlistentry>
360
[cba2d4e]361 <varlistentry id="runlevel">
362 <term><command>runlevel</command></term>
[f896e21c]363 <listitem>
[cba2d4e]364 <para>Reports the previous and the current run-level, as noted in the
365 last run-level record in <filename>/var/run/utmp</filename>.</para>
366 <indexterm zone="ch-system-systemd runlevel">
367 <primary sortas="b-runlevel">runlevel</primary>
[f896e21c]368 </indexterm>
369 </listitem>
370 </varlistentry>
371
[cba2d4e]372 <varlistentry id="shutdown">
373 <term><command>shutdown</command></term>
[f896e21c]374 <listitem>
[cba2d4e]375 <para>Brings the system down in a secure way, signaling all processes
376 and notifying all logged-in users.</para>
377 <indexterm zone="ch-system-systemd shutdown">
378 <primary sortas="b-shutdown">shutdown</primary>
[f896e21c]379 </indexterm>
380 </listitem>
381 </varlistentry>
382
[cba2d4e]383 <varlistentry id="systemctl">
384 <term><command>systemctl</command></term>
[f896e21c]385 <listitem>
[cba2d4e]386 <para>used to introspect and control the state of the Systemd system and
387 service manager.</para>
388 <indexterm zone="ch-system-systemd systemctl">
389 <primary sortas="b-systemctl">systemctl</primary>
390 </indexterm>
391 </listitem>
392 </varlistentry>
393
394 <varlistentry id="systemd-analyze">
395 <term><command>systemd-analyze</command></term>
396 <listitem>
397 <para>used to determine system boot-up performance of the current boot.
398 </para>
399 <indexterm zone="ch-system-systemd systemd-analyze">
400 <primary sortas="b-systemd-analyze">systemd-analyze</primary>
401 </indexterm>
402 </listitem>
403 </varlistentry>
404
405 <varlistentry id="systemd-ask-password">
406 <term><command>systemd-ask-password</command></term>
407 <listitem>
408 <para>used to query a system password or passphrase from the user, using a
409 question message specified on the command line.</para>
410 <indexterm zone="ch-system-systemd systemd-ask-password">
411 <primary sortas="b-systemd-ask-password">systemd-ask-password</primary>
412 </indexterm>
413 </listitem>
414 </varlistentry>
415
416 <varlistentry id="systemd-cat">
417 <term><command>systemd-cat</command></term>
418 <listitem>
419 <para>used to connect STDOUT and STDERR of a process with the Journal.
420 </para>
421 <indexterm zone="ch-system-systemd systemd-cat">
422 <primary sortas="b-systemd-cat">systemd-cat</primary>
423 </indexterm>
424 </listitem>
425 </varlistentry>
426
427 <varlistentry id="systemd-cgls">
428 <term><command>systemd-cgls</command></term>
429 <listitem>
430 <para>recursively shows the contents of the selected Linux control group
431 hierarchy in a tree.</para>
432 <indexterm zone="ch-system-systemd systemd-cgls">
433 <primary sortas="b-systemd-cgls">systemd-cgls</primary>
434 </indexterm>
435 </listitem>
436 </varlistentry>
437
438 <varlistentry id="systemd-cgtop">
439 <term><command>systemd-cgtop</command></term>
440 <listitem>
441 <para>shows the top control groups of the local Linux control group hierarchy,
442 ordered by their CPU, memory and disk I/O load.</para>
443 <indexterm zone="ch-system-systemd systemd-cgtop">
444 <primary sortas="b-systemd-cgtop">systemd-cgtop</primary>
445 </indexterm>
446 </listitem>
447 </varlistentry>
448
449 <varlistentry id="systemd-coredumpctl">
450 <term><command>systemd-coredumpctl</command></term>
451 <listitem>
452 <para>used to retrieve coredumps from the Systemd Journal</para>
453 <indexterm zone="ch-system-systemd systemd-coredumpctl">
454 <primary sortas="b-systemd-coredumpctl">systemd-coredumpctl</primary>
455 </indexterm>
456 </listitem>
457 </varlistentry>
458
459 <varlistentry id="systemd-delta">
460 <term><command>systemd-delta</command></term>
461 <listitem>
462 <para>used to identify and compare configuration files in
463 <filename class="directory">/etc</filename> that override default
464 counterparts in <filename class="directory">/usr</filename>.</para>
465 <indexterm zone="ch-system-systemd systemd-delta">
466 <primary sortas="b-systemd-delta">systemd-delta</primary>
467 </indexterm>
468 </listitem>
469 </varlistentry>
470
471 <varlistentry id="systemd-detect-virt">
472 <term><command>systemd-detect-virt</command></term>
473 <listitem>
474 <para>detects execution in a virtualized environment.</para>
475 <indexterm zone="ch-system-systemd systemd-detect-virt">
476 <primary sortas="b-systemd-detect-virt">systemd-detect-virt</primary>
477 </indexterm>
478 </listitem>
479 </varlistentry>
480
481 <varlistentry id="systemd-inhibit">
482 <term><command>systemd-inhibit</command></term>
483 <listitem>
484 <para>used to execute a program with a shutdown, sleep or idle inhibitor lock
485 taken.</para>
486 <indexterm zone="ch-system-systemd systemd-inhibit">
487 <primary sortas="b-systemd-inhibit">systemd-inhibit</primary>
488 </indexterm>
489 </listitem>
490 </varlistentry>
491
492 <varlistentry id="systemd-machine-id-setup">
493 <term><command>systemd-machine-id-setup</command></term>
494 <listitem>
495 <para>used by system installer tools to initialize the machine ID stored in
496 <filename>/etc/machine-id</filename> at install time with a randomly
497 generated ID.</para>
498 <indexterm zone="ch-system-systemd systemd-machine-id-setup">
499 <primary sortas="b-systemd-machine-id-setup">systemd-machine-id-setup</primary>
500 </indexterm>
501 </listitem>
502 </varlistentry>
503
504 <varlistentry id="systemd-notify">
505 <term><command>systemd-notify</command></term>
506 <listitem>
507 <para>used by daemon scripts to notify the init system about status changes.
508 </para>
509 <indexterm zone="ch-system-systemd systemd-notify">
510 <primary sortas="b-systemd-notify">systemd-notify</primary>
511 </indexterm>
512 </listitem>
513 </varlistentry>
514
515 <varlistentry id="systemd-nspawn">
516 <term><command>systemd-nspawn</command></term>
517 <listitem>
518 <para>used to run a command or OS in a light-weight namespace container.</para>
519 <indexterm zone="ch-system-systemd systemd-nspawn">
520 <primary sortas="b-systemd-nspawn">systemd-nspawn</primary>
521 </indexterm>
522 </listitem>
523 </varlistentry>
524
525 <varlistentry id="systemd-run">
526 <term><command>systemd-run</command></term>
527 <listitem>
528 <para>used to create and start a transient .service or a .scope unit and
529 run the specified command in it.</para>
530 <indexterm zone="ch-system-systemd systemd-run">
531 <primary sortas="b-systemd-run">systemd-run</primary>
532 </indexterm>
533 </listitem>
534 </varlistentry>
535
536<!-- <varlistentry id="systemd-stdio-bridge">
537 <term><command>systemd-stdio-bridge</command></term>
538 <listitem>
539 <para>To be completed</para>
540 <indexterm zone="ch-system-systemd systemd-stdio-bridge">
541 <primary sortas="b-systemd-stdio-bridge">systemd-stdio-bridge</primary>
542 </indexterm>
543 </listitem>
544 </varlistentry> -->
545
546 <varlistentry id="systemd-tmpfiles">
547 <term><command>systemd-tmpfiles</command></term>
548 <listitem>
549 <para>creates, deletes and cleans up volatile and temporary files and directories,
550 based on the configuration file format and location specified in
551 <filename class="directory">tmpfiles.d</filename> directories.</para>
552 <indexterm zone="ch-system-systemd systemd-tmpfiles">
553 <primary sortas="b-systemd-tmpfiles">systemd-tmpfiles</primary>
554 </indexterm>
555 </listitem>
556 </varlistentry>
557
558 <varlistentry id="systemd-tty-ask-password-agent">
559 <term><command>systemd-tty-ask-password-agent</command></term>
560 <listitem>
561 <para>used to list or process pending Systemd password requests</para>
562 <indexterm zone="ch-system-systemd systemd-tty-ask-password-agent">
563 <primary sortas="b-systemd-tty-ask-password-agent">systemd-tty-ask-password-agent</primary>
564 </indexterm>
565 </listitem>
566 </varlistentry>
567
568 <varlistentry id="telinit">
569 <term><command>telinit</command></term>
570 <listitem>
571 <para>Tells <command>init</command> which run-level to change to.</para>
572 <indexterm zone="ch-system-systemd telinit">
573 <primary sortas="b-telinit">telinit</primary>
574 </indexterm>
575 </listitem>
576 </varlistentry>
577
578 <varlistentry id="timedatectl">
579 <term><command>timedatectl</command></term>
580 <listitem>
581 <para>used to query and change the system clock and its settings.
582 </para>
583 <indexterm zone="ch-system-systemd timedatectl">
584 <primary sortas="b-timedatectl">timedatectl</primary>
[f896e21c]585 </indexterm>
586 </listitem>
587 </varlistentry>
588
589 <varlistentry id="udevadm">
590 <term><command>udevadm</command></term>
591 <listitem>
[cba2d4e]592 <para>Generic Udev administration tool: controls the udevd daemon,
[f896e21c]593 provides info from the Udev database, monitors uevents, waits for
594 uevents to finish, tests Udev configuration, and triggers uevents
[cba2d4e]595 for a given device.</para>
596 <indexterm zone="ch-system-systemd udevadm">
[f896e21c]597 <primary sortas="b-udevadm">udevadm</primary>
598 </indexterm>
599 </listitem>
600 </varlistentry>
601
[cba2d4e]602 <varlistentry id="libsystemd">
603 <term><filename class="libraryfile">libsystemd</filename></term>
[f896e21c]604 <listitem>
[cba2d4e]605 <para>Systemd utility library.</para>
606 <indexterm zone="ch-system-systemd libsystemd">
607 <primary sortas="c-libsystemd">libsystemd</primary>
[f896e21c]608 </indexterm>
609 </listitem>
610 </varlistentry>
611
612 <varlistentry id="libudev">
613 <term><filename class="libraryfile">libudev</filename></term>
614 <listitem>
[cba2d4e]615 <para>A library to access Udev device information.</para>
616 <indexterm zone="ch-system-systemd libudev">
[f896e21c]617 <primary sortas="c-libudev">libudev</primary>
618 </indexterm>
619 </listitem>
620 </varlistentry>
621
622 </variablelist>
623
624 </sect2>
625
626</sect1>
Note: See TracBrowser for help on using the repository browser.