Changeset 63f1942 for BOOK/network

Timestamp:

Jun 23, 2014, 8:42:03 PM (10 years ago)

Author:

Chris Staub <chris@…>

Branches:

clfs-3.0.0-systemd, master, systemd

Children:

d34599a

Parents:

f99afd3

Message:

Added text about timesyncd

File:

• BOOK/network/common/systemd-network.xml (modified) (3 diffs)

BOOK/network/common/systemd-network.xml

@@ -11 +11 @@
   <title>Networking Configuration with Systemd-networkd</title>
 
-  <sect2 role="static">
-    <title>Creating the Static Network Interface Configuration Files</title>
+  <sect2 role="interface-config">
+    <title>Network Interface Configuration</title>
 
     <note><para>Udev may assign random Network Card Interface names
     for some network cards such as enp2s1. If you are not sure what
     your Network Card Interface name is, you can always run
-    <command>ip l</command> after you have booted your system. It is important that the <envar>Name</envar> variable in  <filename>/etc/systemd/network</filename> contain the correct Network Card Interface name (e.g.
-    <envar>Name=enp2s1</envar> or
+    <command>ip l</command> after you have booted your system. It is important
+    that the <envar>Name</envar> variable in
+    <filename>/etc/systemd/network</filename> contain the correct Network Card
+    Interface name (e.g. <envar>Name=enp2s1</envar> or
     <envar>Name=eth0</envar>) or systemd will fail to bring
     up your network interface.</para></note>
 
-    <para><command>systemd-networkd</command> uses <filename>/etc/system/network</filename> for configuration files. Refer to systemd.network(5) and systemd.netdev(5). Configure a network interface with a config file. Adjust Name= as required:</para>
+    <sect3 role="static">
+      <title>Static Network Interface Configuration</title>
 
-<screen><userinput>cd /etc/systemd/network &amp;&amp;
+      <para><command>systemd-networkd</command> uses
+      <filename>/etc/system/network</filename> for configuration files. Refer
+      to systemd.network(5) and systemd.netdev(5). Configure a network
+      interface with a config file. Adjust Name= as required:</para>
+
+  <screen><userinput>cd /etc/systemd/network &amp;&amp;
 cat &gt; static.network &lt;&lt; "EOF"
 [Match]
@@ -34 +42 @@
 EOF</userinput></screen>
 
-    <para os="var-ob">The values of these variables must be changed in every
-    file to match the proper setup.</para>
+      <para os="var-ob">The values of these variables must be changed in every
+      file to match the proper setup.</para>
 
-    <para os="var-i">The <envar>Name</envar> variable defines the interface
-    name, for example, eth0. It is required for all network device configuration
-    files.</para>
+      <para os="var-i">The <envar>Name</envar> variable defines the interface
+      name, for example, eth0. It is required for all network device
+      configuration files.</para>
 
-    <para>The <envar>Gateway</envar> variable should contain the default
-    gateway IP address, if one is present. If not, then comment out the
-    variable entirely.</para>
+      <para>The <envar>Gateway</envar> variable should contain the default
+      gateway IP address, if one is present. If not, then comment out the
+      variable entirely.</para>
 
-    <para>For more information see the <command>systemd.netdev</command> man page.</para>
+      <para>For more information see the <command>systemd.netdev</command> man page.</para>
 
-  </sect2>
+    </sect3>
 
-  <sect2 role="dhcp">
-    <title>Connecting to a network with DHCP</title>
+    <sect3 role="dhcp">
+      <title>Connecting to a network with DHCP</title>
 
-  <para><command>systemd-networkd</command> uses <filename>/etc/systemd/network</filename> for configuration files. Refer to <filename>systemd.network(5)</filename> and <filename>systemd.netdev(5)</filename>. Configure a network interface with a config file. Adjust Name= as required:</para>
+    <para><command>systemd-networkd</command> uses
+    <filename>/etc/systemd/network</filename> for configuration files. Refer
+    to <filename>systemd.network(5)</filename> and
+    <filename>systemd.netdev(5)</filename>. Configure a network interface
+    with a config file. Adjust Name= as required:</para>
 
 <screen><userinput>cd /etc/systemd/network &amp;&amp;
@@ -63 +75 @@
 EOF</userinput></screen>
 
-  <para><command>systemd-networkd</command> will automatically configure <filename>/run/systemd/network/resolv.conf</filename> when using DHCP. If you did not manually create <filename>/etc/resolv.conf</filename>, create a symlink:</para>
+    <para><command>systemd-networkd</command> will automatically configure
+    <filename>/run/systemd/network/resolv.conf</filename> when using DHCP.
+    If you did not manually create <filename>/etc/resolv.conf</filename>,
+    create a symlink:</para>
 
 <screen><userinput>ln -sv /run/systemd/network/resolv.conf /etc</userinput></screen>
+
+    </sect3>
+
+  </sect2>
+
+  <sect2 role="timesyncd">
+    <title>Using Timesyncd</title>
+
+    <para>Systemd includes a simple NTP client daemon,
+    <command>systemd-timesyncd</command>, though it is disabled by
+    default. If you want to enable it, you will first need to add a required
+    user and group:</para>
+
+<screen><userinput>groupadd -g &gid-systemd-timesync; systemd-timesync
+useradd -g systemd-timesync -u &uid-systemd-timesync; -d /dev/null -s /bin/false systemd-timesync</userinput></screen>
+
+    <para>Then, actually enable <command>systemd-timesyncd</command> so that
+    it will run on system boot:</para>
+
+<screen><userinput>systemctl enable systemd-timesyncd</userinput></screen>
+
+    <para>You can configure <command>systemd-timesyncd</command> by editing
+    <filename>/etc/systemd/timesyncd.conf</filename>.</para>
 
   <para>Continue to <xref linkend="chapter-bootable"/>.</para>