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+<!--
+ The FreeBSD Documentation Project
+ The FreeBSD French Documentation Project
+
+ $Id$
+ $FreeBSD$
+ Original revision: 1.7
+ This section contains the contents of the old UPGRADE.TXT
+ file.
+-->
+<sect1 id="upgrading">
+ <title>***Non traduit ***Upgrading &os;</title>
+
+ <para>These instructions describe a procedure for doing a binary
+ upgrade from an older version of &os;.</para>
+
+ <warning>
+ <para>While the &os; upgrade procedure does its best to
+ safeguard against accidental loss of data, it is still more than
+ possible to <emphasis>wipe out your entire disk</emphasis> with
+ this installation! Please do not accept the final confirmation
+ request unless you have adequately backed up any important data
+ files.</para>
+ </warning>
+
+ <important>
+ <para>These notes assume that you are using the version of
+ &man.sysinstall.8; supplied with the version of &os; to which you
+ intend to upgrade. Using a mismatched version of &man.sysinstall.8; is
+ almost guaranteed to cause problems and has been known to leave
+ systems in an unusable state. The most commonly made mistake in
+ this regard is the use of an old copy of &man.sysinstall.8; from
+ an existing installation to upgrade to a newer version of
+ &os;. This is <emphasis>not</emphasis> recommended.</para>
+ </important>
+
+ <sect2>
+ <title>Introduction</title>
+
+ <para>The upgrade procedure replaces distributions selected by the
+ user with those corresponding to the new &os; release. It
+ preserves standard system configuration data, as well as user
+ data, installed packages and other software.</para>
+
+ <para>Administrators contemplating an upgrade are encouraged to
+ study this section in its entirety before commencing an upgrade.
+ Failure to do so may result in a failed upgrade or loss of data.</para>
+
+ <sect3>
+ <title>Upgrade Overview</title>
+
+ <para>Upgrading of a distribution is performed by extracting the
+ new version of the component over the top of the previous
+ version. Files belonging to the old distribution are not
+ deleted.</para>
+
+ <para>System configuration is preserved by retaining and
+ restoring the previous version of the following files:</para>
+
+ <para><filename>Xaccel.ini</filename>,
+<filename>XF86Config</filename>,
+<filename>adduser.conf</filename>,
+<filename>aliases</filename>,
+<filename>aliases.db</filename>,
+<filename>amd.map</filename>,
+<filename>crontab</filename>,
+<filename>csh.cshrc</filename>,
+<filename>csh.login</filename>,
+<filename>csh.logout</filename>,
+<filename>cvsupfile</filename>,
+<filename>dhclient.conf</filename>,
+<filename>disktab</filename>,
+<filename>dm.conf</filename>,
+<filename>dumpdates</filename>,
+<filename>exports</filename>,
+<filename>fbtab</filename>,
+<filename>fstab</filename>,
+<filename>ftpusers</filename>,
+<filename>gettytab</filename>,
+<filename>gnats</filename>,
+<filename>group</filename>,
+<filename>hosts</filename>,
+<filename>hosts.allow</filename>,
+<filename>hosts.equiv</filename>,
+<filename>hosts.lpd</filename>,
+<filename>inetd.conf</filename>,
+<filename>localtime</filename>,
+<filename>login.access</filename>,
+<filename>login.conf</filename>,
+<filename>mail</filename>,
+<filename>mail.rc</filename>,
+<filename>make.conf</filename>,
+<filename>manpath.config</filename>,
+<filename>master.passwd</filename>,
+<filename>modems</filename>,
+<filename>motd</filename>,
+<filename>namedb</filename>,
+<filename>networks</filename>,
+<filename>newsyslog.conf</filename>,
+<filename>nsmb.conf</filename>,
+<filename>nsswitch.conf</filename>,
+<filename>pam.conf</filename>,
+<filename>passwd</filename>,
+<filename>periodic</filename>,
+<filename>ppp</filename>,
+<filename>printcap</filename>,
+<filename>profile</filename>,
+<filename>pwd.db</filename>,
+<filename>rc.conf</filename>,
+<filename>rc.conf.local</filename>,
+<filename>rc.firewall</filename>,
+<filename>rc.local</filename>,
+<filename>remote</filename>,
+<filename>resolv.conf</filename>,
+<filename>rmt</filename>,
+<filename>sendmail.cf</filename>,
+<filename>sendmail.cw</filename>,
+<filename>services</filename>,
+<filename>shells</filename>,
+<filename>skeykeys</filename>,
+<filename>spwd.db</filename>,
+<filename>ssh</filename>,
+<filename>syslog.conf</filename>,
+<filename>ttys</filename>,
+<filename>uucp</filename>
+</para>
+
+ <para>The versions of these files which correspond to the new
+ version are moved to <filename>/etc/upgrade/</filename>. The
+ system administrator may peruse these new versions and merge
+ components as desired. Note that many of these files are
+ interdependent, and the best merge procedure is to copy all
+ site-specific data from the current files into the new.</para>
+
+ <para>During the upgrade procedure, the administrator is
+ prompted for a location into which all files from
+ <filename>/etc/</filename> are saved. In the event that local
+ modifications have been made to other files, they may be
+ subsequently retrieved from this location.</para>
+
+ </sect3>
+ </sect2>
+
+ <sect2>
+ <title>Procedure</title>
+
+ <para>This section details the upgrade procedure. Particular
+ attention is given to items which substantially differ from a
+ normal installation.</para>
+
+ <sect3>
+ <title>Backup</title>
+
+ <para>User data and system configuration should be backed up
+ before upgrading. While the upgrade procedure does its best
+ to prevent accidental mistakes, it is possible to partially or
+ completely destroy data and configuration information.</para>
+ </sect3>
+
+ <sect3>
+ <title>Mount Filesystems</title>
+
+ <para>The disklabel editor is entered with the nominated disk's
+ filesystem devices listed. Prior to commencing the upgrade, the
+ administrator should make a note of the device names and
+ corresponding mountpoints. These mountpoints should be entered
+ here. <emphasis>Do not</emphasis>set the <quote>newfs
+ flag</quote> for any filesystems, as this will cause data
+ loss.</para>
+ </sect3>
+
+ <sect3>
+ <title>Select Distributions</title>
+
+ <para>When selecting distributions, there are no constraints
+ on which must be selected. As a general rule, the <literal>bin</literal>
+ distribution should be selected for an update, and the <literal>man</literal>
+ distribution if manpages are already installed. Other
+ distributions may be selected beyond those originally
+ installed if the administrator wishes to add additional
+ functionality.</para>
+ </sect3>
+
+ <sect3 id="fstab">
+ <title>After Installation</title>
+
+ <para>Once the installation procedure has completed, the
+ administrator is prompted to examine the new configuration
+ files. At this point, checks should be made to ensure that the
+ system configuration is valid. In particular, the
+ <filename>/etc/rc.conf</filename> and
+ <filename>/etc/fstab</filename> files should be checked.</para>
+ </sect3>
+ </sect2>
+
+ <sect2>
+ <title>Upgrading from Source Code</title>
+
+ <para>Those interested in an upgrade method that allows more
+ flexibility and sophistication should take a look at
+ <ulink
+ url="http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/handbook/cutting-edge.html">The
+ Cutting Edge</ulink> in the &os; Handbook. This procedure involves
+ rebuilding all of &os; from source code. It requires reliable
+ network connectivity, extra disk space, and time, but has
+ advantages for networks and other more complex
+ installations. This is roughly the same procedure as is used for
+ track the -STABLE or -CURRENT development branches.</para>
+
+ <para><filename>/usr/src/UPDATING</filename> contains important
+ information on updating a &os; system from source code. It lists
+ various issues resulting from changes in &os; that may affect an
+ upgrade.</para>
+ </sect2>
+</sect1>
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