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<html lang="en"><head><META http-equiv="Content-Type" content="text/html; charset=UTF-8"><link href="./images/docs-stylesheet.css" rel="stylesheet" type="text/css"><title>Apache Tomcat 8 (8.0.53) - Introduction</title><meta name="author" content="Robert Slifka"><script type="application/javascript" data-comments-identifier="tomcat-8.0-doc/introduction">
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</script></head><body><div id="wrapper"><header><div id="header"><div><div><div class="logo noPrint"><a href="https://tomcat.apache.org/"><img alt="Tomcat Home" src="./images/tomcat.png"></a></div><div style="height: 1px;"></div><div class="asfLogo noPrint"><a href="https://www.apache.org/" target="_blank"><img src="./images/asf-logo.svg" alt="The Apache Software Foundation" style="width: 266px; height: 83px;"></a></div><h1>Apache Tomcat 8</h1><div class="versionInfo">
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Version 8.0.53,
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<time datetime="2018-06-29">Jun 29 2018</time></div><div style="height: 1px;"></div><div style="clear: left;"></div></div></div></div></header><div id="middle"><div><div id="mainLeft" class="noprint"><div><nav><div><h2>Links</h2><ul><li><a href="index.html">Docs Home</a></li><li><a href="https://wiki.apache.org/tomcat/FAQ">FAQ</a></li><li><a href="#comments_section">User Comments</a></li></ul></div><div><h2>User Guide</h2><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="host-manager-howto.html">6) Host Manager</a></li><li><a href="realm-howto.html">7) Realms and AAA</a></li><li><a href="security-manager-howto.html">8) Security Manager</a></li><li><a href="jndi-resources-howto.html">9) JNDI Resources</a></li><li><a href="jndi-datasource-examples-howto.html">10) JDBC DataSources</a></li><li><a href="class-loader-howto.html">11) Classloading</a></li><li><a href="jasper-howto.html">12) JSPs</a></li><li><a href="ssl-howto.html">13) SSL/TLS</a></li><li><a href="ssi-howto.html">14) SSI</a></li><li><a href="cgi-howto.html">15) CGI</a></li><li><a href="proxy-howto.html">16) Proxy Support</a></li><li><a href="mbeans-descriptors-howto.html">17) MBeans Descriptors</a></li><li><a href="default-servlet.html">18) Default Servlet</a></li><li><a href="cluster-howto.html">19) Clustering</a></li><li><a href="balancer-howto.html">20) Load Balancer</a></li><li><a href="connectors.html">21) Connectors</a></li><li><a href="monitoring.html">22) Monitoring and Management</a></li><li><a href="logging.html">23) Logging</a></li><li><a href="apr.html">24) APR/Native</a></li><li><a href="virtual-hosting-howto.html">25) Virtual Hosting</a></li><li><a href="aio.html">26) Advanced IO</a></li><li><a href="extras.html">27) Additional Components</a></li><li><a href="maven-jars.html">28) Mavenized</a></li><li><a href="security-howto.html">29) Security Considerations</a></li><li><a href="windows-service-howto.html">30) Windows Service</a></li><li><a href="windows-auth-howto.html">31) Windows Authentication</a></li><li><a href="jdbc-pool.html">32) Tomcat's JDBC Pool</a></li><li><a href="web-socket-howto.html">33) WebSocket</a></li><li><a href="rewrite.html">34) Rewrite</a></li></ul></div><div><h2>Reference</h2><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 2.3 Javadocs</a></li><li><a href="elapi/index.html">EL 3.0 Javadocs</a></li><li><a href="websocketapi/index.html">WebSocket 1.1 Javadocs</a></li><li><a href="https://tomcat.apache.org/connectors-doc/">JK 1.2 Documentation</a></li></ul></div><div><h2>Apache Tomcat Development</h2><ul><li><a href="building.html">Building</a></li><li><a href="changelog.html">Changelog</a></li><li><a href="https://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></div></nav></div></div><div id="mainRight"><div id="content"><h2>Introduction</h2><h3 id="Table_of_Contents">Table of Contents</h3><div class="text">
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<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>
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</div><h3 id="Introduction">Introduction</h3><div class="text">
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<p>For administrators and web developers alike, there are some important bits
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of information you should familiarize yourself with before starting out. This
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document serves as a brief introduction to some of the concepts and
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terminology behind the Tomcat container. As well, where to go when you need
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help.</p>
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</div><h3 id="Terminology">Terminology</h3><div class="text">
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<p>In the course of reading these documents, you will run across a number of
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terms; some specific to Tomcat, and others defined by the
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<a href="https://wiki.apache.org/tomcat/Specifications">Servlet and
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JSP specifications</a>.</p>
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<ul>
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<li><strong>Context</strong> - In a nutshell, a Context is a
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web application.</li>
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</ul>
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<p>That is it. If you find any more terms we need to add to this section, please
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do let us know.</p>
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</div><h3 id="Directories_and_Files">Directories and Files</h3><div class="text">
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<p>Throughout the docs, you'll notice there are numerous references to
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<strong>$CATALINA_HOME</strong>. This represents the root of your Tomcat
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installation. When we say, "This information can be found in your
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$CATALINA_HOME/README.txt file" we mean to look at the README.txt file at the
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root of your Tomcat install. Optionally, Tomcat may be configured for multiple
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instances by defining <strong>$CATALINA_BASE</strong> for each instance. If
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multiple instances are not configured, <strong>$CATALINA_BASE</strong> is the
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same as <strong>$CATALINA_HOME</strong>.</p>
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<p>These are some of the key tomcat directories:</p>
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<ul>
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<li><strong>/bin</strong> - Startup, shutdown, and other scripts. The
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<code>*.sh</code> files (for Unix systems) are functional duplicates of
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the <code>*.bat</code> files (for Windows systems). Since the Win32
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command-line lacks certain functionality, there are some additional
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files in here.</li>
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<li><strong>/conf</strong> - Configuration files and related DTDs. The most
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important file in here is server.xml. It is the main configuration file
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for the container.</li>
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<li><strong>/logs</strong> - Log files are here by default.</li>
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<li><strong>/webapps</strong> - This is where your webapps go.</li>
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</ul>
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</div><h3 id="Configuring_Tomcat">Configuring Tomcat</h3><div class="text">
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<p>This section will acquaint you with the basic information used during
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the configuration of the container.</p>
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<p>All of the information in the configuration files is read at startup,
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meaning that any change to the files necessitates a restart of the container.
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</p>
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</div><h3 id="Where_to_Go_for_Help">Where to Go for Help</h3><div class="text">
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<p>While we've done our best to ensure that these documents are clearly
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written and easy to understand, we may have missed something. Provided
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below are various web sites and mailing lists in case you get stuck.</p>
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<p>Keep in mind that some of the issues and solutions vary between the
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major versions of Tomcat. As you search around the web, there will be
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some documentation that is not relevant to Tomcat 8, but
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only to earlier versions.</p>
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<ul>
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<li>Current document - most documents will list potential hangups. Be sure
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to fully read the relevant documentation as it will save you much time
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and effort. There's nothing like scouring the web only to find out that
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the answer was right in front of you all along!</li>
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<li><a href="https://wiki.apache.org/tomcat/FAQ">Tomcat FAQ</a></li>
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<li><a href="https://wiki.apache.org/tomcat/">Tomcat WIKI</a></li>
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<li>Tomcat FAQ at <a href="http://www.jguru.com/faq/home.jsp?topic=Tomcat">jGuru</a></li>
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<li>Tomcat mailing list archives - numerous sites archive the Tomcat mailing
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lists. Since the links change over time, clicking here will search
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<a href="https://www.google.com/search?q=tomcat+mailing+list+archives">Google</a>.
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</li>
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<li>The TOMCAT-USER mailing list, which you can subscribe to
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<a href="https://tomcat.apache.org/lists.html">here</a>. If you don't
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get a reply, then there's a good chance that your question was probably
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answered in the list archives or one of the FAQs. Although questions
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about web application development in general are sometimes asked and
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answered, please focus your questions on Tomcat-specific issues.</li>
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<li>The TOMCAT-DEV mailing list, which you can subscribe to
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<a href="https://tomcat.apache.org/lists.html">here</a>. This list is
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<strong>reserved</strong> for discussions about the development of Tomcat
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itself. Questions about Tomcat configuration, and the problems you run
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into while developing and running applications, will normally be more
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appropriate on the TOMCAT-USER list instead.</li>
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</ul>
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<p>And, if you think something should be in the docs, by all means let us know
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on the TOMCAT-DEV list.</p>
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</div><div class="noprint"><h3 id="comments_section">
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Comments
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</h3><div class="text"><p class="notice"><strong>Notice: </strong>This comments section collects your suggestions
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on improving documentation for Apache Tomcat.<br><br>
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If you have trouble and need help, read
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<a href="https://tomcat.apache.org/findhelp.html">Find Help</a> page
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and ask your question on the tomcat-users
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<a href="https://tomcat.apache.org/lists.html">mailing list</a>.
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Do not ask such questions here. This is not a Q&A section.<br><br>
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The Apache Comments System is explained <a href="./comments.html">here</a>.
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Comments may be removed by our moderators if they are either
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implemented or considered invalid/off-topic.
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</p><div id="comments_thread"></div></div></div></div></div></div></div><footer><div id="footer">
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Copyright © 1999-2018, The Apache Software Foundation
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