source: chapter06/systemd.xml@ 8a5a68d

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Last change on this file since 8a5a68d was 8a5a68d, checked in by Douglas R. Reno <renodr@…>, 7 years ago

Typo fix. Thanks William Harrington

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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, fix a build error when using Util-Linux built in
44 Chapter 5:</para>
45
46<screen><userinput remap="pre">sed -i "s:blkid/::" $(grep -rl "blkid/blkid.h")</userinput></screen>
47
48<!-- Not needed as of 231. -renodr
49 <para>Fix a potential security issue with framebuffer devices:</para>
50
51<screen><userinput remap="pre">sed -e 's@DRI and frame buffer@DRI@' \
52 -e '/SUBSYSTEM==\"graphics\", KERNEL==\"fb\*\"/d' \
53 -i src/login/70-uaccess.rules</userinput></screen>
54-->
55
56 <para>Disable two tests that always fail:</para>
57
58<screen><userinput remap="pre">sed -e 's@test/udev-test.pl @@' \
59 -e 's@test-copy$(EXEEXT) @@' \
60 -i Makefile.in</userinput></screen>
61
62<!-- Not needed as of 232... anyone notice a pattern here? -renodr
63 <para>Apply a patch to fix a security issue:</para>
64
65<screen><userinput remap="pre">patch -Np1 -i ../systemd-231-security_fix-1.patch</userinput></screen>
66-->
67
68 <para>Create a file to allow systemd to build when using Util-Linux
69 built in Chapter 5, to disable LTO by default, and to build without
70 xlstproc:</para>
71
72<screen><userinput remap="pre">cat &gt; config.cache &lt;&lt; "EOF"
73<literal>KILL=/bin/kill
74MOUNT_PATH=/bin/mount
75UMOUNT_PATH=/bin/umount
76HAVE_BLKID=1
77BLKID_LIBS="-lblkid"
78BLKID_CFLAGS="-I/tools/include/blkid"
79HAVE_LIBMOUNT=1
80MOUNT_LIBS="-lmount"
81MOUNT_CFLAGS="-I/tools/include/libmount"
82cc_cv_CFLAGS__flto=no
83SULOGIN="/sbin/sulogin"
84GPERF_LEN_TYPE=size_t
85XSLTPROC="/usr/bin/xsltproc"</literal>
86EOF</userinput></screen>
87
88 <para>LTO is disabled by default because it causes
89 <command>systemd</command> and other auxiliary programs to link to
90 <filename class="libraryfile">libgcc_s.so</filename>, slows the build down
91 and makes the compiled code larger.</para>
92
93 <para>Prepare systemd for compilation:</para>
94
95<screen><userinput remap="configure">./configure --prefix=/usr \
96 --sysconfdir=/etc \
97 --localstatedir=/var \
98 --config-cache \
99 --with-rootprefix= \
100 --with-rootlibdir=/lib \
101 --enable-split-usr \
102 --disable-firstboot \
103 --disable-ldconfig \
104 --disable-sysusers \
105 --without-python \
106 --with-default-dnssec=no \
107 --docdir=/usr/share/doc/systemd-&systemd-version;</userinput></screen>
108
109 <variablelist>
110 <title>The meaning of the configure options:</title>
111
112 <varlistentry>
113 <term><parameter>--config-cache</parameter></term>
114 <listitem>
115 <para>This switch tells the build system to use
116 the <filename>config.cache</filename> file which
117 was created earlier.</para>
118 </listitem>
119 </varlistentry>
120
121 <varlistentry>
122 <term><parameter>--with-root*</parameter></term>
123 <listitem>
124 <para>These switches ensure that core programs and
125 shared libraries are installed in the subdirectories
126 of the root partition.</para>
127 </listitem>
128 </varlistentry>
129
130 <varlistentry>
131 <term><parameter>--enable-split-usr</parameter></term>
132 <listitem>
133 <para>This switch ensures that systemd will work on
134 systems where /bin, /lib and /sbin directories are not
135 symlinks to their /usr counterparts.</para>
136 </listitem>
137 </varlistentry>
138
139 <varlistentry>
140 <term><parameter>--without-python</parameter></term>
141 <listitem>
142 <para>This switch prevents <command>configure</command>
143 from trying to use Python which isn't built
144 in LFS.</para>
145 </listitem>
146 </varlistentry>
147
148 <varlistentry>
149 <term><parameter>--disable-firstboot</parameter></term>
150 <listitem>
151 <para>This switch prevents installation of systemd
152 services responsible for setting up the system for
153 the first time. They are not useful for LFS because
154 everything is done manually.</para>
155 </listitem>
156 </varlistentry>
157
158 <varlistentry>
159 <term><parameter>--disable-ldconfig</parameter></term>
160 <listitem>
161 <para>This switch prevents installation of a systemd
162 unit that runs <command>ldconfig</command> at
163 boot, making the boot time longer. Remove it if the
164 described feature is desired, even though it's not
165 useful for source distributions such as LFS.</para>
166 </listitem>
167 </varlistentry>
168
169 <varlistentry>
170 <term><parameter>--disable-sysusers</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 early in this chapter.</para>
177 </listitem>
178 </varlistentry>
179
180 <varlistentry>
181 <term><parameter>--with-default-dnssec=no</parameter></term>
182 <listitem>
183 <para>This switch turns off the experimental DNSSEC support.</para>
184 </listitem>
185 </varlistentry>
186
187 </variablelist>
188
189 <para>Fix a generated file:</para>
190
191<screen><userinput remap="pre">sed -i s/size_t/GPERF_LEN_TYPE/ src/resolve/dns_type-from-name.h</userinput></screen>
192
193 <para>Compile the package:</para>
194
195<screen><userinput remap="make">make LD_LIBRARY_PATH=/tools/lib</userinput></screen>
196
197 <para>This package has a test suite, but it can only be run after the
198 package has been installed.</para>
199
200 <para>Install the package:</para>
201
202<screen><userinput remap="install">make LD_LIBRARY_PATH=/tools/lib install</userinput></screen>
203
204<!-- These get installed into /lib now by default.
205 <para>Move the NSS libraries to <filename class="directory">/lib</filename>:</para>
206
207<screen><userinput remap="install">mv -v /usr/lib/libnss_{myhostname,mymachines,resolve}.so.2 /lib</userinput></screen>
208-->
209
210 <para>Remove an unnecessary directory:</para>
211
212<screen><userinput remap="install">rm -rfv /usr/lib/rpm</userinput></screen>
213
214 <para>Create the Sysvinit compatibility symlinks, so systemd is used
215 as the default init system:</para>
216
217<screen><userinput remap="install">for tool in runlevel reboot shutdown poweroff halt telinit; do
218 ln -sfv ../bin/systemctl /sbin/${tool}
219done
220ln -sfv ../lib/systemd/systemd /sbin/init</userinput></screen>
221
222<!--
223 <para>Remove a reference to a non-existent group:</para>
224
225<screen><userinput remap="install">sed -i "s:0775 root lock:0755 root root:g" /usr/lib/tmpfiles.d/legacy.conf</userinput></screen>
226-->
227
228 <para>Create the <filename>/etc/machine-id</filename> file needed by
229 <command>systemd-journald</command>:</para>
230
231<screen><userinput remap="adjust">systemd-machine-id-setup</userinput></screen>
232
233 <para>Since the testsuite largely depends on the host system kernel
234 configuration, some tests may fail. It also needs a modification in
235 order not to look for a program that will be installed by Util-Linux
236 package later in this chapter. To test the results, issue:</para>
237
238<screen><userinput remap="test">sed -i "s:minix:ext4:g" src/test/test-path-util.c
239make LD_LIBRARY_PATH=/tools/lib -k check</userinput></screen>
240
241 </sect2>
242
243 <sect2 id="contents-systemd" role="content">
244 <title>Contents of systemd</title>
245
246 <segmentedlist>
247 <segtitle>Installed programs</segtitle>
248 <segtitle>Installed libraries</segtitle>
249 <segtitle>Installed directories</segtitle>
250
251 <seglistitem>
252 <seg>bootctl, busctl, coredumpctl, halt, hostnamectl, init, journalctl,
253 kernel-install, localectl, loginctl, machinectl, networkctl, poweroff,
254 reboot, runlevel, shutdown, systemctl, systemd-analyze,
255 systemd-ask-password, systemd-cat, systemd-cgls, systemd-cgtop,
256 systemd-delta, systemd-detect-virt, systemd-escape, systemd-hwdb,
257 systemd-inhibit, systemd-machine-id-setup, systemd-mount,
258 systemd-notify, systemd-nspawn, systemd-path, systemd-resolve,
259 systemd-run, systemd-socket-activate,
260 systemd-stdio-bridge, systemd-tmpfiles, systemd-tty-ask-password-agent,
261 telinit, timedatectl, and udevadm</seg>
262 <seg>libnss_myhostname.so.2, libnss_mymachines.so.2,
263 libnss_resolve.so.2, libnss_systemd.so.2,
264 libsystemd.so, libsystemd-shared-231.so,
265 and libudev.so</seg>
266 <seg>/etc/binfmt.d, /etc/init.d, /etc/kernel, /etc/modules-load.d,
267 /etc/sysctl.d, /etc/systemd, /etc/tmpfiles.d, /etc/udev,
268 /etc/xdg/systemd, /lib/systemd, /lib/udev, /usr/include/systemd,
269 /usr/lib/binfmt.d, /usr/lib/kernel, /usr/lib/modules-load.d,
270 /usr/lib/sysctl.d, /usr/lib/systemd, /usr/lib/tmpfiles.d,
271 /usr/share/doc/systemd-&systemd-version;, /usr/share/factory,
272 /usr/share/systemd, /var/lib/systemd, and /var/log/journal</seg>
273 </seglistitem>
274 </segmentedlist>
275
276 <variablelist>
277 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
278 <?dbfo list-presentation="list"?>
279 <?dbhtml list-presentation="table"?>
280
281 <varlistentry id="bootctl">
282 <term><command>bootctl</command></term>
283 <listitem>
284 <para>used to query the firmware and boot manager settings</para>
285 <indexterm zone="ch-system-systemd bootctl">
286 <primary sortas="b-bootctl">bootctl</primary>
287 </indexterm>
288 </listitem>
289 </varlistentry>
290
291 <varlistentry id="busctl">
292 <term><command>busctl</command></term>
293 <listitem>
294 <para>Used to introspect and monitor the D-Bus bus</para>
295 <indexterm zone="ch-system-systemd busctl">
296 <primary sortas="b-busctl">busctl</primary>
297 </indexterm>
298 </listitem>
299 </varlistentry>
300
301 <varlistentry id="coredumpctl">
302 <term><command>coredumpctl</command></term>
303 <listitem>
304 <para>Used to retrieve coredumps from the systemd Journal</para>
305 <indexterm zone="ch-system-systemd coredumpctl">
306 <primary sortas="b-coredumpctl">coredumpctl</primary>
307 </indexterm>
308 </listitem>
309 </varlistentry>
310
311 <varlistentry id="halt">
312 <term><command>halt</command></term>
313 <listitem>
314 <para>Normally invokes <command>shutdown</command> with the
315 <parameter>-h</parameter> option, except when already in run-level 0,
316 then it tells the kernel to halt the system; it notes in the
317 file <filename>/var/log/wtmp</filename> that the system is being
318 brought down</para>
319 <indexterm zone="ch-system-systemd halt">
320 <primary sortas="b-halt">halt</primary>
321 </indexterm>
322 </listitem>
323 </varlistentry>
324
325 <varlistentry id="hostnamectl">
326 <term><command>hostnamectl</command></term>
327 <listitem>
328 <para>Used to query and change the system hostname and related
329 settings</para>
330 <indexterm zone="ch-system-systemd hostnamectl">
331 <primary sortas="b-hostnamectl">hostnamectl</primary>
332 </indexterm>
333 </listitem>
334 </varlistentry>
335
336 <varlistentry id="init">
337 <term><command>init</command></term>
338 <listitem>
339 <para>The first process to be started when the kernel has initialized
340 the hardware which takes over the boot process and starts all the
341 proceses it is instructed to</para>
342 <indexterm zone="ch-system-systemd init">
343 <primary sortas="b-init">init</primary>
344 </indexterm>
345 </listitem>
346 </varlistentry>
347
348 <varlistentry id="journalctl">
349 <term><command>journalctl</command></term>
350 <listitem>
351 <para>Used to query the contents of the systemd Journal</para>
352 <indexterm zone="ch-system-systemd journalctl">
353 <primary sortas="b-journalctl">journalctl</primary>
354 </indexterm>
355 </listitem>
356 </varlistentry>
357
358 <varlistentry id="kernel-install">
359 <term><command>kernel-install</command></term>
360 <listitem>
361 <para>Used to add and remove kernel and initramfs images to and
362 from /boot</para>
363 <indexterm zone="ch-system-systemd kernel-install">
364 <primary sortas="b-kernel-install">kernel-install</primary>
365 </indexterm>
366 </listitem>
367 </varlistentry>
368
369 <varlistentry id="localectl">
370 <term><command>localectl</command></term>
371 <listitem>
372 <para>Used to query and change the system locale and keyboard layout
373 settings</para>
374 <indexterm zone="ch-system-systemd localectl">
375 <primary sortas="b-localectl">localectl</primary>
376 </indexterm>
377 </listitem>
378 </varlistentry>
379
380 <varlistentry id="loginctl">
381 <term><command>loginctl</command></term>
382 <listitem>
383 <para>Used to introspect and control the state of the systemd Login
384 Manager</para>
385 <indexterm zone="ch-system-systemd loginctl">
386 <primary sortas="b-loginctl">loginctl</primary>
387 </indexterm>
388 </listitem>
389 </varlistentry>
390
391 <varlistentry id="machinectl">
392 <term><command>machinectl</command></term>
393 <listitem>
394 <para>Used to introspect and control the state of the systemd Virtual
395 Machine and Container Registration Manager</para>
396 <indexterm zone="ch-system-systemd machinectl">
397 <primary sortas="b-machinectl">machinectl</primary>
398 </indexterm>
399 </listitem>
400 </varlistentry>
401
402 <varlistentry id="networkctl">
403 <term><command>networkctl</command></term>
404 <listitem>
405 <para>Used to introspect the state of the network links as seen by
406 systemd-networkd</para>
407 <indexterm zone="ch-system-systemd networkctl">
408 <primary sortas="b-networkctl">networkctl</primary>
409 </indexterm>
410 </listitem>
411 </varlistentry>
412
413 <varlistentry id="poweroff">
414 <term><command>poweroff</command></term>
415 <listitem>
416 <para>Tells the kernel to halt the system and switch off the computer
417 (see <command>halt</command>)</para>
418 <indexterm zone="ch-system-systemd poweroff">
419 <primary sortas="b-poweroff">poweroff</primary>
420 </indexterm>
421 </listitem>
422 </varlistentry>
423
424 <varlistentry id="reboot">
425 <term><command>reboot</command></term>
426 <listitem>
427 <para>Tells the kernel to reboot the system (see
428 <command>halt</command>)</para>
429 <indexterm zone="ch-system-systemd reboot">
430 <primary sortas="b-reboot">reboot</primary>
431 </indexterm>
432 </listitem>
433 </varlistentry>
434
435 <varlistentry id="runlevel">
436 <term><command>runlevel</command></term>
437 <listitem>
438 <para>Reports the previous and the current run-level, as noted in the
439 last run-level record in <filename>/var/run/utmp</filename></para>
440 <indexterm zone="ch-system-systemd runlevel">
441 <primary sortas="b-runlevel">runlevel</primary>
442 </indexterm>
443 </listitem>
444 </varlistentry>
445
446 <varlistentry id="shutdown">
447 <term><command>shutdown</command></term>
448 <listitem>
449 <para>Brings the system down in a secure way, signaling all processes
450 and notifying all logged-in users</para>
451 <indexterm zone="ch-system-systemd shutdown">
452 <primary sortas="b-shutdown">shutdown</primary>
453 </indexterm>
454 </listitem>
455 </varlistentry>
456
457 <varlistentry id="systemctl">
458 <term><command>systemctl</command></term>
459 <listitem>
460 <para>Used to introspect and control the state of the systemd system
461 and service manager</para>
462 <indexterm zone="ch-system-systemd systemctl">
463 <primary sortas="b-systemctl">systemctl</primary>
464 </indexterm>
465 </listitem>
466 </varlistentry>
467
468 <varlistentry id="systemd-analyze">
469 <term><command>systemd-analyze</command></term>
470 <listitem>
471 <para>Used to determine system boot-up performance of the current
472 boot</para>
473 <indexterm zone="ch-system-systemd systemd-analyze">
474 <primary sortas="b-systemd-analyze">systemd-analyze</primary>
475 </indexterm>
476 </listitem>
477 </varlistentry>
478
479 <varlistentry id="systemd-ask-password">
480 <term><command>systemd-ask-password</command></term>
481 <listitem>
482 <para>Used to query a system password or passphrase from the user,
483 using a question message specified on the command line</para>
484 <indexterm zone="ch-system-systemd systemd-ask-password">
485 <primary sortas="b-systemd-ask-password">systemd-ask-password</primary>
486 </indexterm>
487 </listitem>
488 </varlistentry>
489
490 <varlistentry id="systemd-cat">
491 <term><command>systemd-cat</command></term>
492 <listitem>
493 <para>Used to connect STDOUT and STDERR of a process with the Journal
494 </para>
495 <indexterm zone="ch-system-systemd systemd-cat">
496 <primary sortas="b-systemd-cat">systemd-cat</primary>
497 </indexterm>
498 </listitem>
499 </varlistentry>
500
501 <varlistentry id="systemd-cgls">
502 <term><command>systemd-cgls</command></term>
503 <listitem>
504 <para>Recursively shows the contents of the selected Linux control
505 group hierarchy in a tree</para>
506 <indexterm zone="ch-system-systemd systemd-cgls">
507 <primary sortas="b-systemd-cgls">systemd-cgls</primary>
508 </indexterm>
509 </listitem>
510 </varlistentry>
511
512 <varlistentry id="systemd-cgtop">
513 <term><command>systemd-cgtop</command></term>
514 <listitem>
515 <para>Shows the top control groups of the local Linux control group
516 hierarchy, ordered by their CPU, memory and disk I/O load</para>
517 <indexterm zone="ch-system-systemd systemd-cgtop">
518 <primary sortas="b-systemd-cgtop">systemd-cgtop</primary>
519 </indexterm>
520 </listitem>
521 </varlistentry>
522
523 <varlistentry id="systemd-delta">
524 <term><command>systemd-delta</command></term>
525 <listitem>
526 <para>Used to identify and compare configuration files in
527 <filename class="directory">/etc</filename> that override default
528 counterparts in <filename class="directory">/usr</filename></para>
529 <indexterm zone="ch-system-systemd systemd-delta">
530 <primary sortas="b-systemd-delta">systemd-delta</primary>
531 </indexterm>
532 </listitem>
533 </varlistentry>
534
535 <varlistentry id="systemd-detect-virt">
536 <term><command>systemd-detect-virt</command></term>
537 <listitem>
538 <para>Detects execution in a virtualized environment</para>
539 <indexterm zone="ch-system-systemd systemd-detect-virt">
540 <primary sortas="b-systemd-detect-virt">systemd-detect-virt</primary>
541 </indexterm>
542 </listitem>
543 </varlistentry>
544
545 <varlistentry id="systemd-escape">
546 <term><command>systemd-escape</command></term>
547 <listitem>
548 <para>Used to escape strings for inclusion in systemd unit
549 names</para>
550 <indexterm zone="ch-system-systemd systemd-escape">
551 <primary sortas="b-systemd-escape">systemd-escape</primary>
552 </indexterm>
553 </listitem>
554 </varlistentry>
555
556 <varlistentry id="systemd-hwdb">
557 <term><command>systemd-hwdb</command></term>
558 <listitem>
559 <para>Used to manage hardware database (hwdb)</para>
560 <indexterm zone="ch-system-systemd systemd-hwdb">
561 <primary sortas="b-systemd-hwdb">systemd-hwdb</primary>
562 </indexterm>
563 </listitem>
564 </varlistentry>
565
566 <varlistentry id="systemd-inhibit">
567 <term><command>systemd-inhibit</command></term>
568 <listitem>
569 <para>Used to execute a program with a shutdown, sleep or idle
570 inhibitor lock taken</para>
571 <indexterm zone="ch-system-systemd systemd-inhibit">
572 <primary sortas="b-systemd-inhibit">systemd-inhibit</primary>
573 </indexterm>
574 </listitem>
575 </varlistentry>
576
577 <varlistentry id="systemd-machine-id-setup">
578 <term><command>systemd-machine-id-setup</command></term>
579 <listitem>
580 <para>Used by system installer tools to initialize the machine ID
581 stored in <filename>/etc/machine-id</filename> at install time with a
582 randomly generated ID</para>
583 <indexterm zone="ch-system-systemd systemd-machine-id-setup">
584 <primary sortas="b-systemd-machine-id-setup">systemd-machine-id-setup</primary>
585 </indexterm>
586 </listitem>
587 </varlistentry>
588
589 <varlistentry id="systemd-mount">
590 <term><command>systemd-mount</command></term>
591 <listitem>
592 <para>is a tool to temporarily mount or auto-mount a drive.</para>
593 <indexterm zone="ch-system-systemd systemd-mount">
594 <primary sortas="b-systemd-mount">systemd-mount</primary>
595 </indexterm>
596 </listitem>
597 </varlistentry>
598
599 <varlistentry id="systemd-notify">
600 <term><command>systemd-notify</command></term>
601 <listitem>
602 <para>Used by daemon scripts to notify the init system about status
603 changes</para>
604 <indexterm zone="ch-system-systemd systemd-notify">
605 <primary sortas="b-systemd-notify">systemd-notify</primary>
606 </indexterm>
607 </listitem>
608 </varlistentry>
609
610 <varlistentry id="systemd-nspawn">
611 <term><command>systemd-nspawn</command></term>
612 <listitem>
613 <para>Used to run a command or OS in a light-weight namespace
614 container</para>
615 <indexterm zone="ch-system-systemd systemd-nspawn">
616 <primary sortas="b-systemd-nspawn">systemd-nspawn</primary>
617 </indexterm>
618 </listitem>
619 </varlistentry>
620
621 <varlistentry id="systemd-path">
622 <term><command>systemd-path</command></term>
623 <listitem>
624 <para>Used to query system and user paths</para>
625 <indexterm zone="ch-system-systemd systemd-path">
626 <primary sortas="b-systemd-path">systemd-path</primary>
627 </indexterm>
628 </listitem>
629 </varlistentry>
630
631 <varlistentry id="systemd-resolve">
632 <term><command>systemd-resolve</command></term>
633 <listitem>
634 <para>Used to resolve domain names, IPV4 and IPv6 addresses, DNS
635 resource records, and services</para>
636 <indexterm zone="ch-system-systemd systemd-resolve">
637 <primary sortas="b-systemd-resolve">systemd-resolve</primary>
638 </indexterm>
639 </listitem>
640 </varlistentry>
641
642 <varlistentry id="systemd-run">
643 <term><command>systemd-run</command></term>
644 <listitem>
645 <para>Used to create and start a transient .service or a .scope unit
646 and run the specified command in it</para>
647 <indexterm zone="ch-system-systemd systemd-run">
648 <primary sortas="b-systemd-run">systemd-run</primary>
649 </indexterm>
650 </listitem>
651 </varlistentry>
652
653 <!-- <varlistentry id="systemd-stdio-bridge">
654 <term><command>systemd-stdio-bridge</command></term>
655 <listitem>
656 <para>To be completed</para>
657 <indexterm zone="ch-system-systemd systemd-stdio-bridge">
658 <primary sortas="b-systemd-stdio-bridge">systemd-stdio-bridge</primary>
659 </indexterm>
660 </listitem>
661 </varlistentry> -->
662
663 <varlistentry id="systemd-socket-activate">
664 <term><command>systemd-socket-activate</command></term>
665 <listitem>
666 <para>is a tool to listen on socket devices and launch a process upon
667 connection.</para>
668 <indexterm zone="ch-system-systemd systemd-socket-activate">
669 <primary sortas="b-systemd-socket-activate">systemd-socket-activate</primary>
670 </indexterm>
671 </listitem>
672 </varlistentry>
673
674 <varlistentry id="systemd-tmpfiles">
675 <term><command>systemd-tmpfiles</command></term>
676 <listitem>
677 <para>Creates, deletes and cleans up volatile and temporary files and
678 directories, based on the configuration file format and location
679 specified in
680 <filename class="directory">tmpfiles.d</filename> directories</para>
681 <indexterm zone="ch-system-systemd systemd-tmpfiles">
682 <primary sortas="b-systemd-tmpfiles">systemd-tmpfiles</primary>
683 </indexterm>
684 </listitem>
685 </varlistentry>
686
687 <varlistentry id="systemd-tty-ask-password-agent">
688 <term><command>systemd-tty-ask-password-agent</command></term>
689 <listitem>
690 <para>Used to list or process pending systemd password requests</para>
691 <indexterm zone="ch-system-systemd systemd-tty-ask-password-agent">
692 <primary sortas="b-systemd-tty-ask-password-agent">systemd-tty-ask-password-agent</primary>
693 </indexterm>
694 </listitem>
695 </varlistentry>
696
697 <varlistentry id="telinit">
698 <term><command>telinit</command></term>
699 <listitem>
700 <para>Tells <command>init</command> which run-level to change
701 to</para>
702 <indexterm zone="ch-system-systemd telinit">
703 <primary sortas="b-telinit">telinit</primary>
704 </indexterm>
705 </listitem>
706 </varlistentry>
707
708 <varlistentry id="timedatectl">
709 <term><command>timedatectl</command></term>
710 <listitem>
711 <para>Used to query and change the system clock and its settings
712 </para>
713 <indexterm zone="ch-system-systemd timedatectl">
714 <primary sortas="b-timedatectl">timedatectl</primary>
715 </indexterm>
716 </listitem>
717 </varlistentry>
718
719 <varlistentry id="udevadm">
720 <term><command>udevadm</command></term>
721 <listitem>
722 <para>Generic Udev administration tool: controls the udevd daemon,
723 provides info from the Udev database, monitors uevents, waits for
724 uevents to finish, tests Udev configuration, and triggers uevents
725 for a given device</para>
726 <indexterm zone="ch-system-systemd udevadm">
727 <primary sortas="b-udevadm">udevadm</primary>
728 </indexterm>
729 </listitem>
730 </varlistentry>
731
732 <varlistentry id="libsystemd">
733 <term><filename class="libraryfile">libsystemd</filename></term>
734 <listitem>
735 <para>systemd utility library</para>
736 <indexterm zone="ch-system-systemd libsystemd">
737 <primary sortas="c-libsystemd">libsystemd</primary>
738 </indexterm>
739 </listitem>
740 </varlistentry>
741
742 <varlistentry id="libudev">
743 <term><filename class="libraryfile">libudev</filename></term>
744 <listitem>
745 <para>A library to access Udev device information</para>
746 <indexterm zone="ch-system-systemd libudev">
747 <primary sortas="c-libudev">libudev</primary>
748 </indexterm>
749 </listitem>
750 </varlistentry>
751
752 </variablelist>
753
754 </sect2>
755
756</sect1>
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