Ignore:
Timestamp:
04/03/2014 09:52:09 PM (10 years ago)
Author:
Bruce Dubbs <bdubbs@…>
Branches:
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
Children:
9839808
Parents:
008436e
Message:

Added systemd and dbus to the book.
Set up systemd and System V side-by-side with the
ability to reboot to either system.

git-svn-id: ​http://svn.linuxfromscratch.org/LFS/trunk/BOOK@10520 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

File:
1 edited

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  • chapter06/systemd.xml

    r008436e rcba2d4e  
    66]>
    77
    8 <sect1 id="ch-system-udev" role="wrap">
    9   <?dbhtml filename="udev.html"?>
     8<sect1 id="ch-system-systemd" role="wrap">
     9  <?dbhtml filename="systemd.html"?>
    1010
    1111  <sect1info condition="script">
    12     <productname>udev</productname>
     12    <productname>systemd</productname>
    1313    <productnumber>&systemd-version;</productnumber>
    1414    <address>&systemd-url;</address>
    1515  </sect1info>
    1616
    17   <title>Udev-&systemd-version; (Extracted from systemd-&systemd-version;)</title>
    18 
    19   <indexterm zone="ch-system-udev">
    20     <primary sortas="a-Udev">Udev</primary>
     17  <title>Systemd-&systemd-version;</title>
     18
     19  <indexterm zone="ch-system-systemd">
     20    <primary sortas="a-Systemd">Systemd</primary>
    2121  </indexterm>
    2222
    … …  
    2424    <title/>
    2525
    26     <para>The Udev package contains programs for dynamic creation of device
    27     nodes.  The development of udev has been merged with systemd, but
    28     most of systemd is incompatible with LFS.  Here we build and install just
    29     the needed udev files.</para>
     26    <para>The Systemd package contains programs for controlling the startup,
     27    running, and shutdown of the system.</para>
    3028
    3129    <segmentedlist>
    … …  
    4139
    4240  <sect2 role="installation">
    43     <title>Installation of Udev</title>
    44 
    45     <note><para>This package is a little different from other packages.  The
    46     initial package that is extracted is
    47     <filename>systemd-&systemd-version;.tar.xz</filename> even though the
    48     application we are installing is udev. After changing to the
    49     systemd directory, follow the instructions below.</para></note>
    50 
    51     <para>The udev-lfs tarball contains LFS-specific files used to build
    52     Udev. Unpack it into the systemd source directory:</para>
    53 
    54 <screen><userinput remap="pre">tar -xvf ../&udev-lfs;.tar.bz2</userinput></screen>
    55 
    56     <para>Create two symbolic links to header files and set an
    57     environment variable to properly use <xref linkend="ch-tools-util-linux"/>.</para>
    58 
    59 <screen><userinput remap="pre">ln -svf /tools/include/blkid /usr/include
    60 ln -svf /tools/include/uuid  /usr/include
    61 export LD_LIBRARY_PATH=/tools/lib</userinput></screen>
    62 
    63     <para>Build the package:</para>
    64 
    65 <screen><userinput remap="make">make -f &udev-lfs;/Makefile.lfs</userinput></screen>
     41    <title>Installation of Systemd</title>
     42
     43    <para>First, create a file to allow Systemd to build when using Util-Linux
     44    built in Chapter 5:</para>
     45
     46<screen><userinput remap="pre">cat &gt; config.cache &lt;&lt; "EOF"
     47<literal>KILL=/bin/kill
     48HAVE_BLKID=1
     49BLKID_LIBS="-lblkid"
     50BLKID_CFLAGS="-I/tools/include/blkid"</literal>
     51EOF</userinput></screen>
     52
     53    <para>Aditionally, fix a build error when using Util-Linux built in
     54    Chapter 5:</para>
     55
     56<screen><userinput remap="pre">sed -i "s:blkid/::" $(grep -rl "blkid/blkid.h")</userinput></screen>
     57
     58    <para>Apply a patch so that compat <command>pkg-config</command> files get
     59    installed without installing compat libs which are useless on LFS:</para>
     60
     61<screen><userinput remap="pre">patch -Np1 -i ../&systemd-compat-patch;</userinput></screen>
     62
     63    <para>Prepare Systemd for compilation:</para>
     64
     65<screen><userinput remap="configure">./configure --prefix=/usr                                           \
     66            --sysconfdir=/etc                                       \
     67            --localstatedir=/var                                    \
     68            --config-cache                                          \
     69            --with-rootprefix=                                      \
     70            --with-rootlibdir=/lib                                  \
     71            --enable-split-usr                                      \
     72            --disable-gudev                                         \
     73            --without-python                                        \
     74            --docdir=/usr/share/doc/systemd-&systemd-version;                     \
     75            --with-dbuspolicydir=/etc/dbus-1/system.d               \
     76            --with-dbusinterfacedir=/usr/share/dbus-1/interfaces    \
     77            --with-dbussessionservicedir=/usr/share/dbus-1/services \
     78            --with-dbussystemservicedir=/usr/share/dbus-1/system-services</userinput></screen>
     79
     80    <variablelist>
     81      <title>The meaning of the configure options:</title>
     82
     83      <varlistentry>
     84        <term><parameter>--config-cache</parameter></term>
     85        <listitem>
     86          <para>This switch tells the build system to use
     87          the <filename>config.cache</filename> file which
     88          was created earlier.</para>
     89        </listitem>
     90      </varlistentry>
     91
     92      <varlistentry>
     93        <term><parameter>--with-root*</parameter></term>
     94        <listitem>
     95          <para>These switches ensure that core programs and
     96          shared libraries are installed in the subdirectories
     97          of the root partition.</para>
     98        </listitem>
     99      </varlistentry>
     100
     101      <varlistentry>
     102        <term><parameter>--enable-split-usr</parameter></term>
     103        <listitem>
     104          <para>This switch ensures that Systemd will work on
     105          systems where /bin, /lib and /sbin directories are not
     106          symlinks to their /usr counterparts.</para>
     107        </listitem>
     108      </varlistentry>
     109
     110      <varlistentry>
     111        <term><parameter>--disable-gudev --without-python</parameter></term>
     112        <listitem>
     113          <para>These switches disable optional features because
     114          LFS does not provide their dependencies.</para>
     115        </listitem>
     116      </varlistentry>
     117
     118      <varlistentry>
     119        <term><parameter>--with-dbus*</parameter></term>
     120        <listitem>
     121          <para>These switches ensure that D-Bus configuratil files
     122          get installed in the correct locations.</para>
     123        </listitem>
     124      </varlistentry>
     125
     126    </variablelist>
     127
     128    <para>Compile the package:</para>
     129
     130<screen><userinput remap="make">make LIBRARY_PATH=/tools/lib</userinput></screen>
     131
     132    <para>First prevent few broken test cases from running:</para>
     133
     134<screen><userinput remap="test">sed -e "s:test/udev-test.pl::g"            \
     135    -e "s:test-bus-cleanup\$(EXEEXT) ::g"  \
     136    -e "s:test-bus-gvariant\$(EXEEXT) ::g" \
     137    -i Makefile</userinput></screen>
     138
     139    <para>To test the results, issue:</para>
     140
     141<screen><userinput remap="test">make -k check</userinput></screen>
     142
     143    <para>Note that some tests might fail because the test are being run in a
     144    chroot environment. For full test coverage, the test suite should be run
     145    from a system booted using Systemd.</para>
    66146
    67147    <para>Install the package:</para>
    68148
    69 <screen><userinput remap="install">make -f &udev-lfs;/Makefile.lfs install</userinput></screen>
    70 
    71     <caution><para>There are several places within the
    72     <application>systemd</application> source code that have explicit directory
    73     paths embedded.  For instance, the binary version of the hardware
    74     database's path and file name used at run time,
    75     <filename>/etc/udev/hwdb.bin</filename>, cannot be changed without explicit
    76     changes to the source code.</para></caution>
    77 
    78     <para>Now initialize the hardware database:</para>
    79 
    80 <screen><userinput remap="install">build/udevadm hwdb --update</userinput></screen>
    81 
    82     <para>Finally set up the persistent network udev rules.  This task will be
    83     explained in detail in <xref linkend='stable-net-names'/>.  Note that the
    84     <filename class='directory'>/sys</filename> and <filename
    85     class='directory'>/proc</filename> filesystems must be mounted in the
    86     chroot environment as explained at the beginning of this chapter for the
    87     following script to work.</para>
    88 
    89 <screen><userinput remap="install">bash &udev-lfs;/init-net-rules.sh</userinput></screen>
    90 
    91     <para>Do some cleanup:</para>
    92 
    93 <screen><userinput remap="install">rm -fv /usr/include/{uuid,blkid}
    94 unset LD_LIBRARY_PATH</userinput></screen>
     149<screen><userinput remap="install">make LD_LIBRARY_PATH=/tools/lib install</userinput></screen>
     150
     151    <para>Move NSS myhostname library to <filename
     152    class="directory">/lib</filename>:</para>
     153
     154<screen><userinput remap="install">mv -v /usr/lib/libnss_myhostname.so.2 /lib</userinput></screen>
     155
     156    <para>Remove an unnecessary directory:</para>
     157
     158<screen><userinput remap="install">rm -rfv /usr/lib/rpm</userinput></screen>
     159
     160    <para>Create the Sysvinit compatibility symlinks, and move some man pages
     161    and a library that conflict with <xref linkend="ch-system-sysvinit"/> so
     162    both systems can be installed side-by-side:</para>
     163
     164<screen><userinput remap="install">for tool in runlevel reboot shutdown poweroff halt telinit; do
     165  ln -sfv ../bin/systemctl /sbin/${tool}-systemd
     166  mv -v /usr/share/man/man8/${tool}.8 /usr/share/man/man8/${tool}-systemd.8
     167done
     168
     169ln -sfv ../lib/systemd/systemd /sbin/init-systemd
     170mv -v /etc/init.d /etc/init.d-systemd</userinput></screen>
     171
     172    <para>Remove a reference to a non-existent group:</para>
     173
     174<screen><userinput remap="install">sed -i "s:0775 root lock:0755 root root:g" /usr/lib/tmpfiles.d/legacy.conf</userinput></screen>
     175
     176    <para>Create the <filename>/etc/machine-id</filename> file needed by
     177    Journald:</para>
     178
     179<screen><userinput remap="install">systemd-machine-id-setup</userinput></screen>
     180
     181    <para>Finally install some LFS specific udev rules:</para>
     182
     183<screen><userinput remap="install">tar -xf ../&udev-lfs-version;.tar.bz2
     184make -f &udev-lfs-version;/Makefile.lfs install</userinput></screen>
    95185
    96186  </sect2>
    97187
    98   <sect2 id="contents-udev" role="content">
    99     <title>Contents of Udev</title>
     188  <sect2 id="contents-systemd" role="content">
     189    <title>Contents of Systemd</title>
    100190
    101191    <segmentedlist>
    … …  
    105195
    106196      <seglistitem>
    107         <seg>accelerometer, ata_id, cdrom_id, collect, mtd_probe,
    108          scsi_id, v4l_id, udevadm, and udevd</seg>
    109 
    110         <seg>libudev.so</seg>
    111 
    112         <seg>/etc/udev, /lib/udev, /lib/firmware, /usr/share/doc/udev</seg>
     197        <seg>bootctl, busctl, halt, hostnamectl, init, journalctl, kernel-install,
     198        localectl, loginctl, machinectl, poweroff, reboot, runlevel, shutdown,
     199        systemctl, systemd-analyze, systemd-ask-password, systemd-cat, systemd-cgls,
     200        systemd-cgtop, systemd-coredumpctl, systemd-delta, systemd-detect-virt,
     201        systemd-inhibit, systemd-machine-id-setup, systemd-notify, systemd-nspawn,
     202        systemd-run, systemd-stdio-bridge, systemd-tmpfiles, systemd-tty-ask-password-agent,
     203        telinit, timedatectl, and udevadm</seg>
     204
     205        <seg>libnss_myhostname.so.2, libsystemd.so, libudev.so</seg>
     206        <seg>/etc/binfmt.d, /etc/init.d, /etc/kernel, /etc/modules-load.d,
     207        /etc/sysctl.d, /etc/systemd, /etc/tmpfiles.d, /etc/udev,
     208        /etc/xdg/systemd, /lib/systemd, /lib/udev, /usr/include/systemd,
     209        /usr/lib/binfmt.d, /usr/lib/kernel, /usr/lib/modules-load.d,
     210        /usr/lib/sysctl.d, /usr/lib/systemd, /usr/lib/tmpfiles.d,
     211        /usr/share/doc/systemd-&systemd-version;, /usr/share/systemd,
     212        /var/lib/systemd, /var/log/journal</seg>
    113213      </seglistitem>
    114214    </segmentedlist>
    … …  
    119219      <?dbhtml list-presentation="table"?>
    120220
    121       <varlistentry id="ata_id">
    122         <term><command>ata_id</command></term>
    123         <listitem>
    124           <para>Provides Udev with a unique string and
    125           additional information (uuid, label) for an ATA drive</para>
    126           <indexterm zone="ch-system-udev ata_id">
    127             <primary sortas="b-ata_id">ata_id</primary>
    128           </indexterm>
    129         </listitem>
    130       </varlistentry>
    131 
    132       <varlistentry id="cdrom_id">
    133         <term><command>cdrom_id</command></term>
    134         <listitem>
    135           <para>Provides Udev with the capabilities of a
    136           CD-ROM or DVD-ROM drive</para>
    137           <indexterm zone="ch-system-udev cdrom_id">
    138             <primary sortas="b-cdrom_id">cdrom_id</primary>
    139           </indexterm>
    140         </listitem>
    141       </varlistentry>
    142 
    143       <varlistentry id="collect">
    144         <term><command>collect</command></term>
    145         <listitem>
    146           <para>Given an ID for the current uevent and a list of
    147           IDs (for all target uevents), registers the current ID
    148           and indicates whether all target IDs have been registered</para>
    149           <indexterm zone="ch-system-udev collect">
    150             <primary sortas="b-collect">collect</primary>
    151           </indexterm>
    152         </listitem>
    153       </varlistentry>
    154 
    155       <varlistentry id="scsi_id">
    156         <term><command>scsi_id</command></term>
    157         <listitem>
    158           <para>Provides Udev with a unique SCSI identifier
    159           based on the data returned from sending a SCSI INQUIRY command to
    160           the specified device</para>
    161           <indexterm zone="ch-system-udev scsi_id">
    162             <primary sortas="b-scsi_id">scsi_id</primary>
     221      <varlistentry id="bootctl">
     222        <term><command>bootctl</command></term>
     223        <listitem>
     224          <para>used to query the firmware and boot manager settings.</para>
     225          <indexterm zone="ch-system-systemd bootctl">
     226            <primary sortas="b-bootctl">bootctl</primary>
     227          </indexterm>
     228        </listitem>
     229      </varlistentry>
     230
     231      <varlistentry id="busctl">
     232        <term><command>busctl</command></term>
     233        <listitem>
     234          <para>used to introspect and monitor the D-Bus bus.</para>
     235          <indexterm zone="ch-system-systemd busctl">
     236            <primary sortas="b-busctl">busctl</primary>
     237          </indexterm>
     238        </listitem>
     239      </varlistentry>
     240
     241      <varlistentry id="halt">
     242        <term><command>halt</command></term>
     243        <listitem>
     244          <para>Normally invokes <command>shutdown</command> with the
     245          <parameter>-h</parameter> option, except when already in run-level 0,
     246          then it tells the kernel to halt the system; it notes in the
     247          file <filename>/var/log/wtmp</filename> that the system is being
     248          brought down.</para>
     249          <indexterm zone="ch-system-systemd halt">
     250            <primary sortas="b-halt">halt</primary>
     251          </indexterm>
     252        </listitem>
     253      </varlistentry>
     254
     255      <varlistentry id="hostnamectl">
     256        <term><command>hostnamectl</command></term>
     257        <listitem>
     258          <para>used to query and change the system hostname and related
     259          settings.</para>
     260          <indexterm zone="ch-system-systemd hostnamectl">
     261            <primary sortas="b-hostnamectl">hostnamectl</primary>
     262          </indexterm>
     263        </listitem>
     264      </varlistentry>
     265
     266      <varlistentry id="init">
     267        <term><command>init</command></term>
     268        <listitem>
     269          <para>The first process to be started when the kernel has initialized
     270          the hardware which takes over the boot process and starts all the
     271          proceses it is instructed to.</para>
     272          <indexterm zone="ch-system-systemd init">
     273            <primary sortas="b-init">init</primary>
     274          </indexterm>
     275        </listitem>
     276      </varlistentry>
     277
     278      <varlistentry id="journalctl">
     279        <term><command>journalctl</command></term>
     280        <listitem>
     281          <para>used to query the contents of the Systemd Journal.</para>
     282          <indexterm zone="ch-system-systemd journalctl">
     283            <primary sortas="b-journalctl">journalctl</primary>
     284          </indexterm>
     285        </listitem>
     286      </varlistentry>
     287
     288      <varlistentry id="kernel-install">
     289        <term><command>kernel-install</command></term>
     290        <listitem>
     291          <para>used to add and remove kernel and initramfs images to and
     292          from /boot.</para>
     293          <indexterm zone="ch-system-systemd kernel-install">
     294            <primary sortas="b-kernel-install">kernel-install</primary>
     295          </indexterm>
     296        </listitem>
     297      </varlistentry>
     298
     299      <varlistentry id="localectl">
     300        <term><command>localectl</command></term>
     301        <listitem>
     302          <para>used to query and change the system locale and keyboard layout
     303          settings.</para>
     304          <indexterm zone="ch-system-systemd localectl">
     305            <primary sortas="b-localectl">localectl</primary>
     306          </indexterm>
     307        </listitem>
     308      </varlistentry>
     309
     310      <varlistentry id="loginctl">
     311        <term><command>loginctl</command></term>
     312        <listitem>
     313          <para>used to introspect and control the state of the Systemd Login
     314          Manager.</para>
     315          <indexterm zone="ch-system-systemd loginctl">
     316            <primary sortas="b-loginctl">loginctl</primary>
     317          </indexterm>
     318        </listitem>
     319      </varlistentry>
     320
     321      <varlistentry id="machinectl">
     322        <term><command>machinectl</command></term>
     323        <listitem>
     324          <para>used to introspect and control the state of the Systemd Virtual
     325          Machine and Container Registration Manager</para>
     326          <indexterm zone="ch-system-systemd machinectl">
     327            <primary sortas="b-machinectl">machinectl</primary>
     328          </indexterm>
     329        </listitem>
     330      </varlistentry>
     331
     332      <varlistentry id="poweroff">
     333        <term><command>poweroff</command></term>
     334        <listitem>
     335          <para>Tells the kernel to halt the system and switch off the computer
     336          (see <command>halt</command>).</para>
     337          <indexterm zone="ch-system-systemd poweroff">
     338            <primary sortas="b-poweroff">poweroff</primary>
     339          </indexterm>
     340        </listitem>
     341      </varlistentry>
     342
     343      <varlistentry id="reboot">
     344        <term><command>reboot</command></term>
     345        <listitem>
     346          <para>Tells the kernel to reboot the system (see
     347          <command>halt</command>).</para>
     348          <indexterm zone="ch-system-systemd reboot">
     349            <primary sortas="b-reboot">reboot</primary>
     350          </indexterm>
     351        </listitem>
     352      </varlistentry>
     353
     354      <varlistentry id="runlevel">
     355        <term><command>runlevel</command></term>
     356        <listitem>
     357          <para>Reports the previous and the current run-level, as noted in the
     358          last run-level record in <filename>/var/run/utmp</filename>.</para>
     359          <indexterm zone="ch-system-systemd runlevel">
     360            <primary sortas="b-runlevel">runlevel</primary>
     361          </indexterm>
     362        </listitem>
     363      </varlistentry>
     364
     365      <varlistentry id="shutdown">
     366        <term><command>shutdown</command></term>
     367        <listitem>
     368          <para>Brings the system down in a secure way, signaling all processes
     369          and notifying all logged-in users.</para>
     370          <indexterm zone="ch-system-systemd shutdown">
     371            <primary sortas="b-shutdown">shutdown</primary>
     372          </indexterm>
     373        </listitem>
     374      </varlistentry>
     375
     376      <varlistentry id="systemctl">
     377        <term><command>systemctl</command></term>
     378        <listitem>
     379          <para>used to introspect and control the state of the Systemd system and
     380          service manager.</para>
     381          <indexterm zone="ch-system-systemd systemctl">
     382            <primary sortas="b-systemctl">systemctl</primary>
     383          </indexterm>
     384        </listitem>
     385      </varlistentry>
     386
     387      <varlistentry id="systemd-analyze">
     388        <term><command>systemd-analyze</command></term>
     389        <listitem>
     390          <para>used to determine system boot-up performance of the current boot.
     391          </para>
     392          <indexterm zone="ch-system-systemd systemd-analyze">
     393            <primary sortas="b-systemd-analyze">systemd-analyze</primary>
     394          </indexterm>
     395        </listitem>
     396      </varlistentry>
     397
     398      <varlistentry id="systemd-ask-password">
     399        <term><command>systemd-ask-password</command></term>
     400        <listitem>
     401          <para>used to query a system password or passphrase from the user, using a
     402          question message specified on the command line.</para>
     403          <indexterm zone="ch-system-systemd systemd-ask-password">
     404            <primary sortas="b-systemd-ask-password">systemd-ask-password</primary>
     405          </indexterm>
     406        </listitem>
     407      </varlistentry>
     408
     409      <varlistentry id="systemd-cat">
     410        <term><command>systemd-cat</command></term>
     411        <listitem>
     412          <para>used to connect STDOUT and STDERR of a process with the Journal.
     413          </para>
     414          <indexterm zone="ch-system-systemd systemd-cat">
     415            <primary sortas="b-systemd-cat">systemd-cat</primary>
     416          </indexterm>
     417        </listitem>
     418      </varlistentry>
     419
     420      <varlistentry id="systemd-cgls">
     421        <term><command>systemd-cgls</command></term>
     422        <listitem>
     423          <para>recursively shows the contents of the selected Linux control group
     424          hierarchy in a tree.</para>
     425          <indexterm zone="ch-system-systemd systemd-cgls">
     426            <primary sortas="b-systemd-cgls">systemd-cgls</primary>
     427          </indexterm>
     428        </listitem>
     429      </varlistentry>
     430
     431      <varlistentry id="systemd-cgtop">
     432        <term><command>systemd-cgtop</command></term>
     433        <listitem>
     434          <para>shows the top control groups of the local Linux control group hierarchy,
     435          ordered by their CPU, memory and disk I/O load.</para>
     436          <indexterm zone="ch-system-systemd systemd-cgtop">
     437            <primary sortas="b-systemd-cgtop">systemd-cgtop</primary>
     438          </indexterm>
     439        </listitem>
     440      </varlistentry>
     441
     442      <varlistentry id="systemd-coredumpctl">
     443        <term><command>systemd-coredumpctl</command></term>
     444        <listitem>
     445          <para>used to retrieve coredumps from the Systemd Journal</para>
     446          <indexterm zone="ch-system-systemd systemd-coredumpctl">
     447            <primary sortas="b-systemd-coredumpctl">systemd-coredumpctl</primary>
     448          </indexterm>
     449        </listitem>
     450      </varlistentry>
     451
     452      <varlistentry id="systemd-delta">
     453        <term><command>systemd-delta</command></term>
     454        <listitem>
     455          <para>used to identify and compare configuration files in
     456          <filename class="directory">/etc</filename> that override default
     457          counterparts in <filename class="directory">/usr</filename>.</para>
     458          <indexterm zone="ch-system-systemd systemd-delta">
     459            <primary sortas="b-systemd-delta">systemd-delta</primary>
     460          </indexterm>
     461        </listitem>
     462      </varlistentry>
     463
     464      <varlistentry id="systemd-detect-virt">
     465        <term><command>systemd-detect-virt</command></term>
     466        <listitem>
     467          <para>detects execution in a virtualized environment.</para>
     468          <indexterm zone="ch-system-systemd systemd-detect-virt">
     469            <primary sortas="b-systemd-detect-virt">systemd-detect-virt</primary>
     470          </indexterm>
     471        </listitem>
     472      </varlistentry>
     473
     474      <varlistentry id="systemd-inhibit">
     475        <term><command>systemd-inhibit</command></term>
     476        <listitem>
     477          <para>used to execute a program with a shutdown, sleep or idle inhibitor lock
     478          taken.</para>
     479          <indexterm zone="ch-system-systemd systemd-inhibit">
     480            <primary sortas="b-systemd-inhibit">systemd-inhibit</primary>
     481          </indexterm>
     482        </listitem>
     483      </varlistentry>
     484
     485      <varlistentry id="systemd-machine-id-setup">
     486        <term><command>systemd-machine-id-setup</command></term>
     487        <listitem>
     488          <para>used by system installer tools to initialize the machine ID stored in
     489          <filename>/etc/machine-id</filename> at install time with a randomly
     490          generated ID.</para>
     491          <indexterm zone="ch-system-systemd systemd-machine-id-setup">
     492            <primary sortas="b-systemd-machine-id-setup">systemd-machine-id-setup</primary>
     493          </indexterm>
     494        </listitem>
     495      </varlistentry>
     496
     497      <varlistentry id="systemd-notify">
     498        <term><command>systemd-notify</command></term>
     499        <listitem>
     500          <para>used by daemon scripts to notify the init system about status changes.
     501          </para>
     502          <indexterm zone="ch-system-systemd systemd-notify">
     503            <primary sortas="b-systemd-notify">systemd-notify</primary>
     504          </indexterm>
     505        </listitem>
     506      </varlistentry>
     507
     508      <varlistentry id="systemd-nspawn">
     509        <term><command>systemd-nspawn</command></term>
     510        <listitem>
     511          <para>used to run a command or OS in a light-weight namespace container.</para>
     512          <indexterm zone="ch-system-systemd systemd-nspawn">
     513            <primary sortas="b-systemd-nspawn">systemd-nspawn</primary>
     514          </indexterm>
     515        </listitem>
     516      </varlistentry>
     517
     518      <varlistentry id="systemd-run">
     519        <term><command>systemd-run</command></term>
     520        <listitem>
     521          <para>used to create and start a transient .service or a .scope unit and
     522          run the specified command in it.</para>
     523          <indexterm zone="ch-system-systemd systemd-run">
     524            <primary sortas="b-systemd-run">systemd-run</primary>
     525          </indexterm>
     526        </listitem>
     527      </varlistentry>
     528
     529<!--      <varlistentry id="systemd-stdio-bridge">
     530        <term><command>systemd-stdio-bridge</command></term>
     531        <listitem>
     532          <para>To be completed</para>
     533          <indexterm zone="ch-system-systemd systemd-stdio-bridge">
     534            <primary sortas="b-systemd-stdio-bridge">systemd-stdio-bridge</primary>
     535          </indexterm>
     536        </listitem>
     537      </varlistentry> -->
     538
     539      <varlistentry id="systemd-tmpfiles">
     540        <term><command>systemd-tmpfiles</command></term>
     541        <listitem>
     542          <para>creates, deletes and cleans up volatile and temporary files and directories,
     543          based on the configuration file format and location specified in
     544          <filename class="directory">tmpfiles.d</filename> directories.</para>
     545          <indexterm zone="ch-system-systemd systemd-tmpfiles">
     546            <primary sortas="b-systemd-tmpfiles">systemd-tmpfiles</primary>
     547          </indexterm>
     548        </listitem>
     549      </varlistentry>
     550
     551      <varlistentry id="systemd-tty-ask-password-agent">
     552        <term><command>systemd-tty-ask-password-agent</command></term>
     553        <listitem>
     554          <para>used to list or process pending Systemd password requests</para>
     555          <indexterm zone="ch-system-systemd systemd-tty-ask-password-agent">
     556            <primary sortas="b-systemd-tty-ask-password-agent">systemd-tty-ask-password-agent</primary>
     557          </indexterm>
     558        </listitem>
     559      </varlistentry>
     560
     561      <varlistentry id="telinit">
     562        <term><command>telinit</command></term>
     563        <listitem>
     564          <para>Tells <command>init</command> which run-level to change to.</para>
     565          <indexterm zone="ch-system-systemd telinit">
     566            <primary sortas="b-telinit">telinit</primary>
     567          </indexterm>
     568        </listitem>
     569      </varlistentry>
     570
     571      <varlistentry id="timedatectl">
     572        <term><command>timedatectl</command></term>
     573        <listitem>
     574          <para>used to query and change the system clock and its settings.
     575          </para>
     576          <indexterm zone="ch-system-systemd timedatectl">
     577            <primary sortas="b-timedatectl">timedatectl</primary>
    163578          </indexterm>
    164579        </listitem>
    … …  
    168583        <term><command>udevadm</command></term>
    169584        <listitem>
    170           <para>Generic udev administration tool: controls the udevd daemon,
     585          <para>Generic Udev administration tool: controls the udevd daemon,
    171586          provides info from the Udev database, monitors uevents, waits for
    172587          uevents to finish, tests Udev configuration, and triggers uevents
    173           for a given device</para>
    174           <indexterm zone="ch-system-udev udevadm">
     588          for a given device.</para>
     589          <indexterm zone="ch-system-systemd udevadm">
    175590            <primary sortas="b-udevadm">udevadm</primary>
    176591          </indexterm>
    … …  
    178593      </varlistentry>
    179594
    180       <varlistentry id="udevd">
    181         <term><command>udevd</command></term>
    182         <listitem>
    183           <para>A daemon that listens for uevents on the netlink socket,
    184           creates devices and runs the configured external programs in
    185           response to these uevents</para>
    186           <indexterm zone="ch-system-udev udevd">
    187             <primary sortas="b-udevd">udevd</primary>
     595      <varlistentry id="libsystemd">
     596        <term><filename class="libraryfile">libsystemd</filename></term>
     597        <listitem>
     598          <para>Systemd utility library.</para>
     599          <indexterm zone="ch-system-systemd libsystemd">
     600            <primary sortas="c-libsystemd">libsystemd</primary>
    188601          </indexterm>
    189602        </listitem>
    … …  
    193606        <term><filename class="libraryfile">libudev</filename></term>
    194607        <listitem>
    195           <para>A library interface to udev device information</para>
    196           <indexterm zone="ch-system-udev libudev">
     608          <para>A library to access Udev device information.</para>
     609          <indexterm zone="ch-system-systemd libudev">
    197610            <primary sortas="c-libudev">libudev</primary>
    198611          </indexterm>
    … …  
    200613      </varlistentry>
    201614
    202       <varlistentry id="etc-udev">
    203         <term><filename class="directory">/etc/udev</filename></term>
    204         <listitem>
    205           <para>Contains Udev configuration files,
    206           device permissions, and rules for device naming</para>
    207           <indexterm zone="ch-system-udev etc-udev">
    208             <primary sortas="e-/etc/udev">/etc/udev</primary>
    209           </indexterm>
    210         </listitem>
    211       </varlistentry>
    212 
    213615    </variablelist>
    214616
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