source: BOOK/final-system/common/systemd.xml@ f90d077

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  <!ENTITY % general-entities SYSTEM "../../general.ent">
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<sect1 id="ch-system-systemd" role="wrap">
  <?dbhtml filename="systemd.html"?>

  <title>systemd-&systemd-version;</title>

  <indexterm zone="ch-system-systemd">
    <primary sortas="a-systemd">systemd</primary>
  </indexterm>

  <sect2 role="package">
    <title/>

    <para><command>systemd</command> is a system and service manager for Linux
    operating systems.</para>

  </sect2>

  <sect2 role="installation">
    <title>Installation of systemd</title>

    <para os="s1">By default, <command>systemd</command> contains a unit file
    that mounts a tmpfs over /var/lock on boot as 775 with a gid of lock. CLFS
    does not have a lock group. Change this to 777 with the following
    command:</para>

<screen os="s2"><userinput>sed -i "s/\(mode\)=775,gid=lock/\1=777/" \
    units/var-lock.mount</userinput></screen>

    <para os="a">Prepare systemd for compilation:</para>

<screen os="b"><userinput>./configure --prefix=/usr \
    --sysconfdir=/etc --localstatedir=/var \
    --with-rootdir= --with-distro=other \
    --with-syslog-service=rsyslog.service \
    --with-sysvinit-path=/etc/init.d \
    --with-sysvrcd-path=/etc/rc.d</userinput></screen>

    <para os="c">Compile the package:</para>

<screen os="d"><userinput>make</userinput></screen>

    <para os="e">Install the package:</para>

<screen os="f"><userinput>make install</userinput></screen>

  </sect2>

  <sect2 id="conf-systemd" role="configuration">
    <title>Configuring systemd</title>

    <indexterm zone="conf-systemd">
      <primary sortas="a-systemd">systemd</primary>
    <secondary>configuring</secondary></indexterm>

    <indexterm zone="conf-systemd">
      <primary sortas="e-/etc/os-release">/etc/os-release</primary>
    </indexterm>

    <para>Create a file to identify the operating system.
    <command>systemd</command> will use this file on boot to put information
    on the screen.</para>

<screen><userinput>cat &gt; /etc/os-release &lt;&lt; "EOF"
# Begin /etc/os-release

NAME=Cross-LFS
ID=clfs

PRETTY_NAME=Cross Linux From Scratch
ANSI_COLOR=0;33

VERSION=&version;
VERSION_ID=&versionid;

# End /etc/os-release
EOF</userinput></screen>

  </sect2>

  <sect2 id="contents-systemd" role="content">
    <title>Contents of systemd</title>

    <segmentedlist>
      <segtitle>Installed programs</segtitle>
      <segtitle>Installed libraries</segtitle>
      <segtitle>Installed directories</segtitle>

      <seglistitem>
        <seg>systemctl, systemd, systemd-ask-password, systemd-cgls,
        systemd-notify, systemd-tty-ask-password-agent</seg>
        <seg>pam_systemd</seg>
        <seg>/lib/systemd, /etc/systemd, /etc/tmpfiles.d,
        /usr/share/systemd</seg>
      </seglistitem>
    </segmentedlist>

    <variablelist>
      <bridgehead renderas="sect3">Short Descriptions</bridgehead>
      <?dbfo list-presentation="list"?>
      <?dbhtml list-presentation="table"?>

      <varlistentry id="systemctl">
        <term><command>systemctl</command></term>
        <listitem>
          <para>Control the systemd system and service manager</para>
          <indexterm zone="ch-system-systemd systemctl">
            <primary sortas="b-systemctl">systemctl</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="systemd">
        <term><command>systemd</command></term>
        <listitem>
          <para>System and service manager for Linux</para>
          <indexterm zone="ch-system-systemd systemd">
            <primary sortas="b-systemd">systemd</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="systemd-ask-password">
        <term><command>systemd-ask-password</command></term>
        <listitem>
          <para>Queries the user for a system passphrase, via the
          TTY or an UI agent.</para>
          <indexterm zone="ch-system-systemd systemd-ask-password">
            <primary sortas="b-systemd-ask-password">systemd-ask-password</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="systemd-cgls">
        <term><command>systemd-cgls</command></term>
        <listitem>
          <para>Recursively shows control group contents</para>
          <indexterm zone="ch-system-systemd systemd-cgls">
            <primary sortas="b-systemd-cgls">systemd-cgls</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="systemd-notify">
        <term><command>systemd-notify</command></term>
        <listitem>
          <para>Notify init system about start-up completion and other daemon
          status changes</para>
          <indexterm zone="ch-system-systemd systemd-notify">
            <primary sortas="b-systemd-notify">systemd-notify</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="systemd-tty-ask-password-agent">
        <term><command>systemd-tty-ask-password-agent</command></term>
        <listitem>
          <para>Process system password requests</para>
          <indexterm zone="ch-system-systemd systemd-tty-ask-password-agent">
            <primary sortas="b-systemd-tty-ask-password-agent">systemd-tty-ask-password-agent</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="pam_systemd">
        <term><filename class="libraryfile">pam_systemd</filename></term>
        <listitem>
          <para>Register user sessions in the systemd control group
          hierarchy</para>
          <indexterm zone="ch-system-systemd pam_systemd">
            <primary sortas="c-pam_systemd">pam_systemd</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="lib-systemd">
        <term><filename class="directory">/lib/systemd</filename></term>
        <listitem>
          <para>Location of system units and configurations</para>
          <indexterm zone="ch-system-systemd lib-systemd">
            <primary sortas="e-/lib/systemd">/lib/systemd</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="etc-systemd">
        <term><filename class="directory">/etc/systemd</filename></term>
        <listitem>
          <para>Location of user units and configurations</para>
          <indexterm zone="ch-system-systemd etc-systemd">
            <primary sortas="e-/etc/systemd">/etc/systemd</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="etc-tmpfilesd">
        <term><filename class="directory">/etc/tmpfiles.d</filename></term>
        <listitem>
          <para>Configuration for creation, deletion and cleaning of temporary
          and volatile files</para>
          <indexterm zone="ch-system-systemd etc-tmpfilesd">
            <primary sortas="e-/etc/tmpfiles.d">/etc/tmpfiles.d</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="usr-share-systemd">
        <term><filename class="directory">/usr/share/systemd</filename></term>
        <listitem>
          <para>Location of session unit files</para>
          <indexterm zone="ch-system-systemd usr-share-systemd">
            <primary sortas="e-/usr/share/systemd">/usr/share/systemd</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

</sect1>