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Add section on systemd customization

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git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@10527 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689
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Bruce Dubbs 2014-04-06 22:36:59 +00:00
parent ba75f1313a
commit c729bc928c
6 changed files with 223 additions and 8 deletions
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9
chapter01/changelog.xml
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@ -35,6 +35,15 @@
</itemizedlist> </itemizedlist>
</listitem> </listitem>
--> -->
<listitem>
<para>2014-04-07</para>
<itemizedlist>
<listitem>
<para>[bdubbs] - Add section on systemd customization.</para>
</listitem>
</itemizedlist>
</listitem>
<listitem> <listitem>
<para>2014-03-31</para> <para>2014-03-31</para>
<itemizedlist> <itemizedlist>

1
chapter07/chapter07.xml
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@ -18,6 +18,7 @@
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="udev.xml"/> <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="udev.xml"/>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="symlinks.xml"/> <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="symlinks.xml"/>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="usage.xml"/> <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="usage.xml"/>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="sysd-custom.xml"/>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="hostname.xml"/> <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="hostname.xml"/>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="setclock.xml"/> <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="setclock.xml"/>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="console.xml"/> <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="console.xml"/>

97
chapter07/console.xml
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@ -23,6 +23,9 @@
equivalent settings in <filename>rc.site</filename>), the equivalent settings in <filename>rc.site</filename>), the
<command>console</command> bootscript will do nothing.</para> <command>console</command> bootscript will do nothing.</para>
<sect2 id="ch-scripts-sysv-console">
<title>Systemd V</title>
<para>The <command>console</command> script reads the <para>The <command>console</command> script reads the
<filename>/etc/sysconfig/console</filename> file for configuration <filename>/etc/sysconfig/console</filename> file for configuration
information. Decide which keymap and screen font will be used. Various information. Decide which keymap and screen font will be used. Various
@ -227,10 +230,96 @@ EOF</userinput></screen>
<!-- Added because folks keep posting their console file with X questions <!-- Added because folks keep posting their console file with X questions
to blfs-support list --> to blfs-support list -->
<note> <note>
<para>The <filename>/etc/sysconfig/console</filename> file only controls the Linux text console localization. It has nothing to do with setting the <para>The <filename>/etc/sysconfig/console</filename> file only controls
proper keyboard layout and terminal fonts in the X Window System, with ssh the Linux text console localization. It has nothing to do with setting
sessions or with a serial console. In such situations, limitations mentioned the proper keyboard layout and terminal fonts in the X Window System, with
in the last two list items above do not apply.</para> ssh sessions or with a serial console. In such situations, limitations
mentioned in the last two list items above do not apply.</para>
</note> </note>
</sect2>
<sect2 id="ch-scripts-systemd-console">
<title>Systemd</title>
<indexterm zone="ch-scripts-systemd-console">
<primary sortas="d-console">systemd console</primary>
<secondary>configuring</secondary>
</indexterm>
<para>This section discusses how to configure the
<command>systemd-vconsole-setup</command> system service, which configures
the virtual console font and console keymap.</para>
<para>The <command>systemd-vconsole-setup</command> service reads the
<filename>/etc/vconsole.conf</filename> file for configuration
information. Decide which keymap and screen font will be used. Various
language-specific HOWTOs can also help with this, see <ulink
url="http://www.tldp.org/HOWTO/HOWTO-INDEX/other-lang.html"/>.
Examine <command>localectl list-keymaps</command> output for a list of
valid console keymaps. Look in
<filename class="directory">/usr/share/consolefonts</filename>
directory for valid screen fonts.</para>
<para>The <filename>/etc/vconsole.conf</filename> file should contain lines
of the form: VARIABLE="value". The following variables are recognized:</para>
<variablelist>
<varlistentry>
<term>KEYMAP</term>
<listitem>
<para>This variable specifies the key mapping table for the keyboard. If
unset, it defaults to <literal>us</literal>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>KEYMAP_TOGGLE</term>
<listitem>
<para>This variable can be used to configure a second toggle keymap and
is unset by default.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>FONT</term>
<listitem>
<para>This variable specifies the font used by the virtual
console.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>FONT_MAP</term>
<listitem>
<para>This variable specifies the console map to be used.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>FONT_UNIMAP</term>
<listitem>
<para>This variable specifies the unicode font map.</para>
</listitem>
</varlistentry>
</variablelist>
<para>An example for a German keyboard and console is given below:</para>
<screen role="nodump"><userinput>cat &gt; /etc/vconsole.conf &lt;&lt; "EOF"
<literal>KEYMAP=de-latin1
FONT=Lat2-Terminus16</literal>
EOF</userinput></screen>
<para>You can change KEYMAP value at runtime by using the
<command>localectl</command> utility:</para>
<screen role="nodump"><userinput>localectl set-keymap MAP</userinput></screen>
<note><para>Please note that <command>localectl</command> command can
be used only on a system booted with Systemd.</para></note>
</sect2>
</sect1> </sect1>

4
chapter07/network.xml
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@ -206,12 +206,12 @@ EOF</userinput></screen>
<para>To disable a previously enabled network interface <para>To disable a previously enabled network interface
card configuration at boot, run:</para> card configuration at boot, run:</para>
<screen><userinput>systemctl disable ifupdown@eth0</userinput></screen> <screen role="nodump"><userinput>systemctl disable ifupdown@eth0</userinput></screen>
<para>To manually start the network interface card configuration, <para>To manually start the network interface card configuration,
run:</para> run:</para>
<screen><userinput>systemctl start ifupdown@eth0</userinput></screen> <screen role="nodump"><userinput>systemctl start ifupdown@eth0</userinput></screen>
<para>Replace eth0 with the correct network interface card <para>Replace eth0 with the correct network interface card
name as described on the beginning of this page.</para> name as described on the beginning of this page.</para>

116
chapter07/sysd-custom.xml Normal file
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@ -0,0 +1,116 @@
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
<!ENTITY % general-entities SYSTEM "../general.ent">
%general-entities;
]>
<sect1 id="ch-scripts-sysd-custom">
<?dbhtml filename="sysd-custom.html"?>
<title>Systemd Customization</title>
<indexterm zone="ch-scripts-sysd-custom">
<primary sortas="e-Systemd">Systemd Customization</primary>
</indexterm>
<sect2>
<title>Basic Configuration</title>
<para>The <filename>/etc/systemd/system.conf</filename> file contains a set
of items to control basic operations. The default file has all entries
commented out with the default settings indicated. This file is where the
log level may be changed as well as some basic journal settings.</para>
</sect2>
<sect2>
<title>Disabling Screen Clearing at Boot Time</title>
<para>The normal behavior for systemd is to clear the secreen at
the end of the boot sequence. If desired, this behavior may be
changed by the following:</para>
<screen role="nodump"><userinput>mkdir -p /etc/systemd/system/getty@tty1.service.d
cat > /etc/systemd/system/getty@tty1.service.d/noclear.conf &lt;&lt; EOF
[Service]
TTYVTDisallocate=no
EOF</userinput></screen>
<para>The boot messages can always be revied by using the
<userinput>journalctl -b</userinput> command as the root user.</para>
</sect2>
<sect2>
<title>Disabling tmpfs for /tmp </title>
<para>By default, <filename class="directory">/tmp</filename> is created as
a tmpfs. If this is not desired, it can be overridden by the following:</para>
<screen role="nodump"><userinput>ln -s /dev/null /etc/systemd/system/tmp.mount</userinput></screen>
<para>This is not necessary if there is a separate partition for /tmp
specified in <filename>/etc/fstab</filename>.</para>
</sect2>
<sect2>
<title>Configuring Automatic File Creation and Deletion</title>
<para>There are several services that create or delete files or
directories:</para>
<itemizedlist>
<listitem><para>systemd-tmpfiles-clean.service</para></listitem>
<listitem><para>systemd-tmpfiles-setup-dev.service</para></listitem>
<listitem><para>systemd-tmpfiles-setup.service</para></listitem>
</itemizedlist>
<para>The system location for the configuration files is
<filename>/usr/lib/tmpfiles.d/*.conf</filename>. The local
configuration files are in <filename>/etc/tmpfiles.d/*.conf</filename>.
Files in /etc/tmpfiles.d override files with the same name in
/usr/lib/tmpfiles.d. See <userinput>man tmpfiles.d</userinput>
for file format details.</para>
</sect2>
<sect2>
<title>Adding Custom Units and Services</title>
<para>A custom service can be added by creating a directory and
configuration file in <filename class="directory">/etc/systemd/system/</filename>.
For example:</para>
<screen role="nodump"><userinput>mkdir -p /etc/systemd/system/foobar.service.d
cat > /etc/systemd/system/foobar.service.d/foobar.conf &lt;&lt; EOF
[Service]
Restart=always
RestartSec=30
EOF</userinput></screen>
<para>See the man page for systemd.unit for more information. After
creating the configuration file, run <userinput>systemctl
daemon-reload</userinput> and <userinput>systemctl restart
foobar</userinput> to activate a service or changes to a service.</para>
</sect2>
<sect2>
<title>Debugging the Boot Sequence</title>
<para>There are several commands that can be used to help debug the systemd
boot process. Here are some examples:</para>
<itemizedlist>
<listitem><para>systemctl list-units -t service [--all]</para></listitem>
<listitem><para>systemctl list-units -t target [--all]</para></listitem>
<listitem><para>systemctl show -p Wants multi-user.target</para></listitem>
<listitem><para>systemctl status sshd.service</para></listitem>
</itemizedlist>
</sect2>
</sect1>

4
general.ent
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@ -1,5 +1,5 @@
<!ENTITY version "SVN-20140404"> <!ENTITY version "SVN-20140407">
<!ENTITY releasedate "April 4, 2014"> <!ENTITY releasedate "April 7, 2014">
<!ENTITY copyrightdate "1999-2014"><!-- jhalfs needs a literal dash, not &ndash; --> <!ENTITY copyrightdate "1999-2014"><!-- jhalfs needs a literal dash, not &ndash; -->
<!ENTITY milestone "8.0"> <!ENTITY milestone "8.0">
<!ENTITY generic-version "development"> <!-- Use "development", "testing", or "x.y[-pre{x}]" --> <!ENTITY generic-version "development"> <!-- Use "development", "testing", or "x.y[-pre{x}]" -->