source: chapter06/systemd.xml@ 976040f

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