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<article xmlns="http://docbook.org/ns/docbook"
  xmlns:xlink="http://www.w3.org/1999/xlink" version="5.0"
  xml:id="top">

  <info>
    <title>&os; &release.current; Installation
      Instructions</title>

    <author>
      <orgname>The &os; Project</orgname>
    </author>

    <pubdate>$FreeBSD$</pubdate>

    <copyright>
      <year>2018</year>
      <holder role="mailto:doc@FreeBSD.org">The &os; Documentation
	Project</holder>
    </copyright>

    <legalnotice xml:id="trademarks" role="trademarks">
      &tm-attrib.freebsd;
      &tm-attrib.intel;
      &tm-attrib.sparc;
      &tm-attrib.general;
    </legalnotice>

    <abstract>
      <para>This article gives some brief instructions on installing
	&os; &release.current; and upgrading the systems running
	earlier releases.</para>
    </abstract>
  </info>

  <sect1 xml:id="install">
    <title>Installing &os;</title>

    <para>The <uri
	xlink:href="&url.books.handbook;/bsdinstall.html">Installing
	&os;</uri> chapter of the <uri
	xlink:href="&url.books.handbook;/">&os; Handbook</uri>
      provides more in-depth information about the installation
      program itself, including a guided walk-through with
      screenshots.</para>
  </sect1>

  <sect1 xml:id="upgrade">
    <title>Upgrading &os;</title>

    <para>If you are upgrading from a previous release of &os;, please
      read <uri
      xlink:href="http://www.FreeBSD.org/releases/&local.rel;R/relnotes.html#upgrade">upgrading
      section in the Release Notes</uri> for notable
      incompatibilities carefully.</para>

    <sect2 xml:id="upgrade-source">
      <title>Upgrading from Source</title>

      <para>The procedure for doing a source code based update is
	described in <uri
	  xlink:href="&url.books.handbook;/synching.html"></uri> and
	<uri
	  xlink:href="&url.books.handbook;/makeworld.html"></uri>.</para>

      <para>For SVN use the <filename>releng/&local.rel;</filename>
	branch which will be where any upcoming Security Advisories or
	Errata Notices will be applied.</para>
    </sect2>

    <sect2 xml:id="upgrade-binary">
      <title>Upgrading Using <quote>&os; Update</quote></title>

      <para>The &man.freebsd-update.8; utility supports binary
	upgrades of &arch.i386; and &arch.amd64; systems running
	earlier FreeBSD releases.  Systems running
	<literal>10.4-RELEASE</literal> or
	<literal>11.1-RELEASE</literal> can upgrade as follows:</para>

      <screen>&prompt.root; freebsd-update fetch
&prompt.root; freebsd-update install</screen>

      <para>Now the &man.freebsd-update.8; utility can fetch bits
	belonging to &release.current;.  During this process
	&man.freebsd-update.8; will ask for help in merging
	configuration files.</para>

      <screen>&prompt.root; freebsd-update upgrade -r &local.rel;-RELEASE</screen>

      <screen>&prompt.root; freebsd-update install</screen>

      <para>The system must now be rebooted with the newly installed
	kernel before the non-kernel components are updated.</para>

      <screen>&prompt.root; shutdown -r now</screen>

      <para>After rebooting, &man.freebsd-update.8; needs to be run
	again to install the new userland components:</para>

      <screen>&prompt.root; freebsd-update install</screen>

      <para>At this point, users of systems being upgraded from
	earlier &os; releases will be prompted by
	&man.freebsd-update.8; to rebuild all third-party applications
	(e.g., ports installed from the ports tree) due to updates in
	system libraries.</para>

      <para>After updating installed third-party applications (and
	again, only if &man.freebsd-update.8; printed a message
	indicating that this was necessary), run
	&man.freebsd-update.8; again so that it can delete the old (no
	longer used) system libraries:</para>

      <screen>&prompt.root; freebsd-update install</screen>

      <para>Finally, reboot into &release.current;</para>

      <screen>&prompt.root; shutdown -r now</screen>
    </sect2>
  </sect1>
</article>