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<html><body><a href="doc012.html"><img src=../icons/next.gif alt="Next"></a><a href="doc000.html"><img src=../icons/up.gif alt="Up"></a><a href="doc010.html"><img src=../icons/previous.gif alt="Previous"></a><a href="doc000.html"><img src=../icons/contents.gif alt="Contents"></a><a href="doc123.html"><img src=../icons/index.gif alt="Index"></a><hr><h2><a name="s1.5">1.5 Upgrading from a Prior Version</a></h2><title>Upgrading from a Prior Version</title><a name="i7"><p>The installation process for Red Hat Linux 4.2 includes the ability toupgrade from prior versions of Red Hat Linux (2.0, 2.1, 3.0.3, and 4.0) whichare based on RPM technology. Upgrading your system installs themodular 2.0.<em>x</em> kernel as well as updated versions of the packageswhich are installed on your machine. The upgrade process preservesexisting configuration files using a <tt>.rpmsave</tt> extenstion (e.g.,<tt>sendmail.cf.rpmsave</tt>) and leaves a log telling what actions ittook in <tt>/tmp/upgradelog</tt>. As software evolves, configuration fileformats can change, so you should carefully compare your originalconfiguration files to the new files before integrating your changes. <p>To upgrade a Red Hat Linux system, you must use a boot floppy (and possibly asupplemental floppy), just as if you were performing a full install.After selecting the medium to install from (and setting up networkinginformation if it's required), the installation procedure prompts youto either <b>Install</b> or <b>Upgrade</b>; select<b>Upgrade</b>. This upgrade procedure is the functional equivalentof running the <tt>upgrade</tt> script in prior versions of Red Hat Linux.<p>Please note that some upgraded packages may ``depend'' on otherpackages which may not be installed on your system. The upgradeprocedure takes care of these <em>dependencies</em>, but it may needto install additional packages in order to satisfy them.<p><p><hr><a href="doc012.html"><img src=../icons/next.gif alt="Next"></a><a href="doc000.html"><img src=../icons/up.gif alt="Up"></a><a href="doc010.html"><img src=../icons/previous.gif alt="Previous"></a><a href="doc000.html"><img src=../icons/contents.gif alt="Contents"></a><a href="doc123.html"><img src=../icons/index.gif alt="Index"></a><hr></body></html>⌨️ 快捷键说明
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