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+<html><head><META http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><title>Apache Tomcat 7 (7.0.42) - Introduction</title><meta name="author" content="Robert Slifka"><style type="text/css" media="print">
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+ </style></head><body bgcolor="#ffffff" text="#000000" link="#525D76" alink="#525D76" vlink="#525D76"><table border="0" width="100%" cellspacing="0"><!--PAGE HEADER--><tr><td><!--PROJECT LOGO--><a href="http://tomcat.apache.org/"><img src="./images/tomcat.gif" align="right" alt="
+ The Apache Tomcat Servlet/JSP Container
+ " border="0"></a></td><td><h1><font face="arial,helvetica,sanserif">Apache Tomcat 7</font></h1><font face="arial,helvetica,sanserif">Version 7.0.42, Jul 2 2013</font></td><td><!--APACHE LOGO--><a href="http://www.apache.org/"><img src="./images/asf-logo.gif" align="right" alt="Apache Logo" border="0"></a></td></tr></table><table border="0" width="100%" cellspacing="4"><!--HEADER SEPARATOR--><tr><td colspan="2"><hr noshade size="1"></td></tr><tr><!--LEFT SIDE NAVIGATION--><td width="20%" valign="top" nowrap class="noPrint"><p><strong>Links</strong></p><ul><li><a href="index.html">Docs Home</a></li><li><a href="http://wiki.apache.org/tomcat/FAQ">FAQ</a></li><li><a href="#comments_section">User Comments</a></li></ul><p><strong>User Guide</strong></p><ul><li><a href="introduction.html">1) Introduction</a></li><li><a href="setup.html">2) Setup</a></li><li><a href="appdev/index.html">3) First webapp</a></li><li><a href="deployer-howto.html">4) Deployer</a></li><li><a href="manager-howto.html">5) Manager</a></li><li><a href="realm-howto.html">6) Realms and AAA</a></li><li><a href="security-manager-howto.html">7) Security Manager</a></li><li><a href="jndi-resources-howto.html">8) JNDI Resources</a></li><li><a href="jndi-datasource-examples-howto.html">9) JDBC DataSources</a></li><li><a href="class-loader-howto.html">10) Classloading</a></li><li><a href="jasper-howto.html">11) JSPs</a></li><li><a href="ssl-howto.html">12) SSL</a></li><li><a href="ssi-howto.html">13) SSI</a></li><li><a href="cgi-howto.html">14) CGI</a></li><li><a href="proxy-howto.html">15) Proxy Support</a></li><li><a href="mbeans-descriptor-howto.html">16) MBean Descriptor</a></li><li><a href="default-servlet.html">17) Default Servlet</a></li><li><a href="cluster-howto.html">18) Clustering</a></li><li><a href="balancer-howto.html">19) Load Balancer</a></li><li><a href="connectors.html">20) Connectors</a></li><li><a href="monitoring.html">21) Monitoring and Management</a></li><li><a href="logging.html">22) Logging</a></li><li><a href="apr.html">23) APR/Native</a></li><li><a href="virtual-hosting-howto.html">24) Virtual Hosting</a></li><li><a href="aio.html">25) Advanced IO</a></li><li><a href="extras.html">26) Additional Components</a></li><li><a href="maven-jars.html">27) Mavenized</a></li><li><a href="security-howto.html">28) Security Considerations</a></li><li><a href="windows-service-howto.html">29) Windows Service</a></li><li><a href="windows-auth-howto.html">30) Windows Authentication</a></li><li><a href="jdbc-pool.html">31) Tomcat's JDBC Pool</a></li><li><a href="web-socket-howto.html">32) WebSocket</a></li></ul><p><strong>Reference</strong></p><ul><li><a href="RELEASE-NOTES.txt">Release Notes</a></li><li><a href="config/index.html">Configuration</a></li><li><a href="api/index.html">Tomcat Javadocs</a></li><li><a href="servletapi/index.html">Servlet Javadocs</a></li><li><a href="jspapi/index.html">JSP 2.2 Javadocs</a></li><li><a href="elapi/index.html">EL 2.2 Javadocs</a></li><li><a href="http://tomcat.apache.org/connectors-doc/">JK 1.2 Documentation</a></li></ul><p><strong>Apache Tomcat Development</strong></p><ul><li><a href="building.html">Building</a></li><li><a href="changelog.html">Changelog</a></li><li><a href="http://wiki.apache.org/tomcat/TomcatVersions">Status</a></li><li><a href="developers.html">Developers</a></li><li><a href="architecture/index.html">Architecture</a></li><li><a href="funcspecs/index.html">Functional Specs.</a></li><li><a href="tribes/introduction.html">Tribes</a></li></ul></td><!--RIGHT SIDE MAIN BODY--><td width="80%" valign="top" align="left" id="mainBody"><h1>Introduction</h1><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Table of Contents"><!--()--></a><a name="Table_of_Contents"><strong>Table of Contents</strong></a></font></td></tr><tr><td><blockquote>
+<ul><li><a href="#Introduction">Introduction</a></li><li><a href="#Terminology">Terminology</a></li><li><a href="#Directories_and_Files">Directories and Files</a></li><li><a href="#Configuring_Tomcat">Configuring Tomcat</a></li><li><a href="#Where_to_Go_for_Help">Where to Go for Help</a></li></ul>
+</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Introduction"><strong>Introduction</strong></a></font></td></tr><tr><td><blockquote>
+
+<p>For administrators and web developers alike, there are some important bits
+of information you should familiarize yourself with before starting out. This
+document serves as a brief introduction to some of the concepts and
+terminology behind the Tomcat container. As well, where to go when you need
+help.</p>
+
+</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Terminology"><strong>Terminology</strong></a></font></td></tr><tr><td><blockquote>
+
+<p>In the course of reading these documents, you will run across a number of
+terms; some specific to Tomcat, and others defined by the
+<a href="http://wiki.apache.org/tomcat/Specifications">Servlet and
+JSP specifications</a>.</p>
+
+<ul>
+<li><strong>Context</strong> - In a nutshell, a Context is a
+ web application.</li>
+<li><strong>Term2</strong> - This is it.</li>
+<li><strong>Term3</strong> - This is it!</li>
+</ul>
+
+</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Directories and Files"><!--()--></a><a name="Directories_and_Files"><strong>Directories and Files</strong></a></font></td></tr><tr><td><blockquote>
+
+<p>Throughout the docs, you'll notice there are numerous references to
+<strong>$CATALINA_HOME</strong>. This represents the root of your Tomcat
+installation. When we say, "This information can be found in your
+$CATALINA_HOME/README.txt file" we mean to look at the README.txt file at the
+root of your Tomcat install. Optionally, Tomcat may be configured for multiple
+instances by defining <strong>$CATALINA_BASE</strong> for each instance. If
+multiple instances are not configured, <strong>$CATALINA_BASE</strong> is the
+same as <strong>$CATALINA_HOME</strong>.</p>
+
+<p>These are some of the key tomcat directories:</p>
+
+<ul>
+<li><strong>/bin</strong> - Startup, shutdown, and other scripts. The
+ <code>*.sh</code> files (for Unix systems) are functional duplicates of
+ the <code>*.bat</code> files (for Windows systems). Since the Win32
+ command-line lacks certain functionality, there are some additional
+ files in here.</li>
+<li><strong>/conf</strong> - Configuration files and related DTDs. The most
+ important file in here is server.xml. It is the main configuration file
+ for the container.</li>
+<li><strong>/logs</strong> - Log files are here by default.</li>
+<li><strong>/webapps</strong> - This is where your webapps go.</li>
+</ul>
+
+</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Configuring Tomcat"><!--()--></a><a name="Configuring_Tomcat"><strong>Configuring Tomcat</strong></a></font></td></tr><tr><td><blockquote>
+
+<p>This section will acquaint you with the basic information used during
+the configuration of the container.</p>
+
+<p>All of the information in the configuration files is read at startup,
+meaning that any change to the files necessitates a restart of the container.
+</p>
+
+</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Where to Go for Help"><!--()--></a><a name="Where_to_Go_for_Help"><strong>Where to Go for Help</strong></a></font></td></tr><tr><td><blockquote>
+
+<p>While we've done our best to ensure that these documents are clearly
+written and easy to understand, we may have missed something. Provided
+below are various web sites and mailing lists in case you get stuck.</p>
+
+<p>As Tomcat 7 is a new release of Tomcat, keep in mind that some of the
+issues and solutions vary between the major versions of Tomcat (6.x versus
+7.x). As you search around the web, there will be some documentation that
+is not relevant to Tomcat 7, but 6.x, 5.x or earlier versions. Doing 3.x
+or 4.x things to 7 will probably not work in most cases as the server.xml
+files are very different.</p>
+
+<ul>
+<li>Current document - most documents will list potential hangups. Be sure
+ to fully read the relevant documentation as it will save you much time
+ and effort. There's nothing like scouring the web only to find out that
+ the answer was right in front of you all along!</li>
+<li><a href="http://wiki.apache.org/tomcat/FAQ">Tomcat FAQ</a></li>
+<li><a href="http://wiki.apache.org/tomcat/">Tomcat WIKI</a></li>
+<li>Tomcat FAQ at <a href="http://www.jguru.com/faq/home.jsp?topic=Tomcat">jGuru</a></li>
+<li>Tomcat mailing list archives - numerous sites archive the Tomcat mailing
+ lists. Since the links change over time, clicking here will search
+ <a href="http://www.google.com/search?q=tomcat+mailing+list+archives">Google</a>.
+ </li>
+<li>The TOMCAT-USER mailing list, which you can subscribe to
+ <a href="http://tomcat.apache.org/lists.html">here</a>. If you don't
+ get a reply, then there's a good chance that your question was probably
+ answered in the list archives or one of the FAQs. Although questions
+ about web application development in general are sometimes asked and
+ answered, please focus your questions on Tomcat-specific issues.</li>
+<li>The TOMCAT-DEV mailing list, which you can subscribe to
+ <a href="http://tomcat.apache.org/lists.html">here</a>. This list is
+ <strong>reserved</strong> for discussions about the development of Tomcat
+ itself. Questions about Tomcat configuration, and the problems you run
+ into while developing and running applications, will normally be more
+ appropriate on the TOMCAT-USER list instead.</li>
+</ul>
+
+<p>And, if you think something should be in the docs, by all means let us know
+on the TOMCAT-DEV list.</p>
+
+</blockquote></td></tr></table></td></tr><tr class="noPrint"><td width="20%" valign="top" nowrap class="noPrint"></td><td width="80%" valign="top" align="left"><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="comments_section" id="comments_section"><strong>Comments</strong></a></font></td></tr><tr><td><blockquote><p class="notice"><strong>Notice: </strong>This comments section collects your suggestions
+ on improving documentation for Apache Tomcat.<br><br>
+ If you have trouble and need help, read
+ <a href="http://tomcat.apache.org/findhelp.html">Find Help</a> page
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