source: basicnet/connect/dhcpcd.xml@ 23325b0

<?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;

  <!ENTITY dhcpcd-download-http "http://roy.marples.name/downloads/dhcpcd/dhcpcd-&dhcpcd-version;.tar.bz2">
  <!ENTITY dhcpcd-download-ftp  "ftp://ftp.osuosl.org/pub/gentoo/distfiles/dhcpcd-&dhcpcd-version;.tar.bz2">
  <!ENTITY dhcpcd-md5sum        "b9f1ccdaaf23ffea7dd6fd89e932f4ed">
  <!ENTITY dhcpcd-size          "51 KB">
  <!ENTITY dhcpcd-buildsize     "0.3 MB">
  <!ENTITY dhcpcd-time          "less than 0.1 SBU">
]>

<sect1 id="dhcpcd" xreflabel="dhcpcd-&dhcpcd-version;">
  <?dbhtml filename="dhcpcd.html"?>

  <sect1info>
    <othername>$LastChangedBy$</othername>
    <date>$Date$</date>
  </sect1info>

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

  <indexterm zone="dhcpcd">
    <primary sortas="a-dhcpcd">dhcpcd</primary>
  </indexterm>

  <sect2 role="package">
    <title>Introduction to dhcpcd</title>

    <para><application>dhcpcd</application> is an implementation of the
    DHCP client specified in RFC2131. This is useful for connecting
    your computer to a network which uses DHCP to assign network
    addresses.</para>

    <bridgehead renderas="sect3">Package Information</bridgehead>
    <itemizedlist spacing="compact">
      <listitem>
        <para>Download (HTTP): <ulink url="&dhcpcd-download-http;"/></para>
      </listitem>
      <listitem>
        <para>Download (FTP): <ulink url="&dhcpcd-download-ftp;"/></para>
      </listitem>
      <listitem>
        <para>Download MD5 sum: &dhcpcd-md5sum;</para>
      </listitem>
      <listitem>
        <para>Download size: &dhcpcd-size;</para>
      </listitem>
      <listitem>
        <para>Estimated disk space required: &dhcpcd-buildsize;</para>
      </listitem>
      <listitem>
        <para>Estimated build time: &dhcpcd-time;</para>
      </listitem>
    </itemizedlist>

    <para condition="html" role="usernotes">User Notes:
    <ulink url="&blfs-wiki;/dhcpcd"/></para>

  </sect2>

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

    <para>Install <application>dhcpcd</application> by running the following
    commands:</para>

<screen><userinput>make PREFIX= \
      LIBEXECDIR=/lib/dhcpcd \
      DBDIR=/var/lib/dhcpcd \
      SYSCONFDIR=/etc/dhcpcd</userinput></screen>

    <para>This package does not come with a test suite.</para>

    <para>Now, as the <systemitem class="username">root</systemitem> user:</para>

<screen><userinput>make PREFIX= \
      LIBEXECDIR=/lib/dhcpcd \
      DBDIR=/var/lib/dhcpcd \
      SYSCONFDIR=/etc/dhcpcd install</userinput></screen>

    <para>By default, a plain text lease info file isn't created but the 
      <application>dhcpcd</application> provides a hook which can be used for creating
      such a file. Install the hook by running the following
      commands as the <systemitem class="username">root</systemitem> user:</para>

<screen><userinput>sed -i "s;/var/lib/dhcpcd-;/var/lib/dhcpcd/dhcpcd-;g" \
       dhcpcd-hooks/50-dhcpcd-compat &amp;&amp;
install -v -m 644 dhcpcd-hooks/50-dhcpcd-compat /lib/dhcpcd/dhcpcd-hooks/</userinput></screen>

  </sect2>

  <sect2 role="configuration">
    <title>Configuring dhcpcd</title>

    <sect3 id="dhcpcd-config">
      <title>Config Files</title>

      <para><filename>/etc/dhcpcd/dhcpcd.conf</filename></para>

      <indexterm zone="dhcpcd dhcpcd-config">
        <primary sortas="e-etc-dhcpcd-dhcpcd-conf">/etc/dhcpcd/dhcpcd.conf</primary>
      </indexterm>

    </sect3>

    <sect3 id="dhcpcd-init">
      <title>Configuration Information</title>

      <para>To configure <command>dhcpcd</command>, you need to first install
      the network service script,
      <filename>/etc/sysconfig/network-devices/services/dhcpcd</filename>
      included in the <xref linkend="bootscripts"/> package
      (as user <systemitem class="username">root</systemitem>):</para>

      <indexterm zone="dhcpcd dhcpcd-init">
        <primary sortas="f-dhcpcd">dhcpcd (service script)</primary>
      </indexterm>

<screen role='root'><userinput>make install-service-dhcpcd</userinput></screen>

      <para>Whenever <command>dhcpcd</command> configures or shuts down
      a network interface, it executes hook scripts. For more details
      about those scripts, see the <command>dhcpcd-run-hooks</command> as
      well as the <command>dhcpcd</command> man page.</para>

      <para id="dhcpcd-config2">Finally, as the <systemitem
      class="username">root</systemitem> user create the
      <filename>/etc/sysconfig/network-devices/ifconfig.eth0/dhcpcd</filename>
      configuration file using the following commands.  Adjust appropriately
      for additional interfaces:</para>

      <indexterm zone="dhcpcd dhcpcd-config2">
        <primary sortas="e-etc-sysconfig-dhcpcd">/etc/sysconfig/.../dhcpcd</primary>
      </indexterm>

<screen role='root'><userinput>install -v -d /etc/sysconfig/network-devices/ifconfig.eth0 &amp;&amp;
cat &gt; /etc/sysconfig/network-devices/ifconfig.eth0/dhcpcd &lt;&lt; "EOF"
<literal>ONBOOT="yes"
SERVICE="dhcpcd"
DHCP_START="<replaceable>&lt;insert appropriate start options here&gt;</replaceable>"
DHCP_STOP="-k <replaceable>&lt;insert additional stop options here&gt;</replaceable>"

# Set PRINTIP="yes" to have the script print
# the DHCP assigned IP address
PRINTIP="no"

# Set PRINTALL="yes" to print the DHCP assigned values for
# IP, SM, DG, and 1st NS. This requires PRINTIP="yes".
PRINTALL="no"</literal>
EOF</userinput></screen>

      <para>For more information on the appropriate <envar>DHCP_START</envar> and
      <envar>DHCP_STOP</envar> values, examine the man page for
      <command>dhcpcd</command>.</para>

      <note>
        <para id="dhcpcd-config3">The default behavior of <command>dhcpcd</command>
        is to overwrite <filename>/etc/resolv.conf</filename>. All modifications on
        system configuration files like <filename>/etc/resolv.conf</filename>, 
        <filename>/etc/yp.conf</filename> and <filename>/etc/ntp.conf</filename> are
        done by hooks which are stored in <filename class="directory">/lib/dhcpcd/dhcpcd-hooks</filename>.
        Setup <command>dhcpcd</command> by removing or adding hooks from/to that directory.
        The execution of hooks can be disabled by using the -C command line option.</para>
        <para>Review the <command>dhcpcd</command> man page for switches to add to the
        <envar>DHCP_START</envar> value.</para>
      </note>

      <indexterm zone="dhcpcd dhcpcd-config3">
        <primary sortas="e-etc-resolv.conf">/etc/resolv.conf</primary>
      </indexterm>
<!--  These are not modified by default with version 4 of dhcpcd
      <indexterm zone="dhcpcd dhcpcd-config3">
        <primary sortas="e-etc-yp.conf">/etc/yp.conf</primary>
      </indexterm>

      <indexterm zone="dhcpcd dhcpcd-config3">
        <primary sortas="e-etc-ntp.conf">/etc/ntp.conf</primary>
      </indexterm>
-->
    </sect3>

  </sect2>

  <sect2 role="content">
    <title>Contents</title>

    <segmentedlist>
      <segtitle>Installed Program</segtitle>
      <segtitle>Installed Libraries</segtitle>
      <segtitle>Installed Directory</segtitle>

      <seglistitem>
        <seg>dhcpcd</seg>
        <seg>None</seg>
        <seg>/lib/dhcpcd, /etc/dhcpcd</seg>
      </seglistitem>
    </segmentedlist>

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

      <varlistentry id="dhcpcd-prog">
        <term><command>dhcpcd</command></term>
        <listitem>
          <para>is an implementation of the DHCP client specified
          in RFC2131.</para>
          <indexterm zone="dhcpcd dhcpcd-prog">
            <primary sortas="b-dhcpcd">dhcpcd</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

</sect1>