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| <title>Configuration Files - Apache HTTP Server Version 2.4</title> |
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| <p class="menu"><a href="./mod/">Modules</a> | <a href="./mod/directives.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="./glossary.html">Glossary</a> | <a href="./sitemap.html">Sitemap</a></p> |
| <p class="apache">Apache HTTP Server Version 2.4</p> |
| <img alt="" src="./images/feather.png" /></div> |
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| <a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs/">Documentation</a> > <a href="./">Version 2.4</a></div><div id="page-content"><div id="preamble"><h1>Configuration Files</h1> |
| <div class="toplang"> |
| <p><span>Available Languages: </span><a href="./de/configuring.html" hreflang="de" rel="alternate" title="Deutsch"> de </a> | |
| <a href="./en/configuring.html" title="English"> en </a> | |
| <a href="./fr/configuring.html" hreflang="fr" rel="alternate" title="Français"> fr </a> | |
| <a href="./ja/configuring.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> | |
| <a href="./ko/configuring.html" hreflang="ko" rel="alternate" title="Korean"> ko </a> | |
| <a href="./tr/configuring.html" hreflang="tr" rel="alternate" title="Türkçe"> tr </a></p> |
| </div> |
| |
| <p>This document describes the files used to configure Apache HTTP |
| Server.</p> |
| </div> |
| <div id="quickview"><a href="https://www.apache.org/foundation/contributing.html" class="badge"><img src="https://www.apache.org/images/SupportApache-small.png" alt="Support Apache!" /></a><ul id="toc"><li><img alt="" src="./images/down.gif" /> <a href="#main">Main Configuration Files</a></li> |
| <li><img alt="" src="./images/down.gif" /> <a href="#syntax">Syntax of the Configuration Files</a></li> |
| <li><img alt="" src="./images/down.gif" /> <a href="#modules">Modules</a></li> |
| <li><img alt="" src="./images/down.gif" /> <a href="#scope">Scope of Directives</a></li> |
| <li><img alt="" src="./images/down.gif" /> <a href="#htaccess">.htaccess Files</a></li> |
| </ul><h3>See also</h3><ul class="seealso"><li><a href="#comments_section">Comments</a></li></ul></div> |
| <div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div> |
| <div class="section"> |
| <h2><a name="main" id="main">Main Configuration Files</a></h2> |
| |
| <table class="related"><tr><th>Related Modules</th><th>Related Directives</th></tr><tr><td><ul><li><code class="module"><a href="./mod/mod_mime.html">mod_mime</a></code></li></ul></td><td><ul><li><code class="directive"><a href="./mod/core.html#ifdefine"><IfDefine></a></code></li><li><code class="directive"><a href="./mod/core.html#include">Include</a></code></li><li><code class="directive"><a href="./mod/mod_mime.html#typesconfig">TypesConfig</a></code></li></ul></td></tr></table> |
| |
| <p>Apache HTTP Server is configured by placing <a href="mod/directives.html">directives</a> in plain text |
| configuration files. The main configuration file is usually called |
| <code>httpd.conf</code>. The location of this file is set at |
| compile-time, but may be overridden with the <code>-f</code> |
| command line flag. In addition, other configuration files may be |
| added using the <code class="directive"><a href="./mod/core.html#include">Include</a></code> |
| directive, and wildcards can be used to include many configuration |
| files. Any directive may be placed in any of these configuration |
| files. Changes to the main configuration files are only |
| recognized by httpd when it is started or restarted.</p> |
| |
| <p>The server also reads a file containing mime document types; |
| the filename is set by the <code class="directive"><a href="./mod/mod_mime.html#typesconfig">TypesConfig</a></code> directive, |
| and is <code>mime.types</code> by default.</p> |
| </div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div> |
| <div class="section"> |
| <h2><a name="syntax" id="syntax">Syntax of the Configuration Files</a></h2> |
| |
| |
| <p>httpd configuration files contain one directive per line. |
| The backslash "\" may be used as the last character on a line |
| to indicate that the directive continues onto the next line. |
| There must be no other characters or white space between the |
| backslash and the end of the line.</p> |
| |
| <p>Arguments to directives are separated by whitespace. If an |
| argument contains spaces, you must enclose that argument in quotes.</p> |
| |
| <p>Directives in the configuration files are case-insensitive, |
| but arguments to directives are often case sensitive. Lines |
| that begin with the hash character "#" are considered |
| comments, and are ignored. Comments may <strong>not</strong> be |
| included on the same line as a configuration directive. |
| White space occurring before a directive is ignored, so |
| you may indent directives for clarity. Blank lines are also ignored.</p> |
| |
| <p>The values of variables defined with the <code class="directive"><a href="./mod/core.html#define">Define</a></code> of or shell environment variables can |
| be used in configuration file lines using the syntax <code>${VAR}</code>. |
| If "VAR" is the name of a valid variable, the value of that variable is |
| substituted into that spot in the configuration file line, and processing |
| continues as if that text were found directly in the configuration file. |
| Variables defined with <code class="directive"><a href="./mod/core.html#define">Define</a></code> take |
| precedence over shell environment variables. |
| If the "VAR" variable is not found, the characters <code>${VAR}</code> |
| are left unchanged, and a warning is logged. |
| Variable names may not contain colon ":" characters, to avoid clashes with |
| <code class="directive"><a href="./mod/mod_rewrite.html#rewritemap">RewriteMap</a></code>'s syntax.</p> |
| |
| <p>Only shell environment variables defined before the server is started |
| can be used in expansions. Environment variables defined in the |
| configuration file itself, for example with <code class="directive"><a href="./mod/mod_env.html#setenv">SetEnv</a></code>, take effect too late to be used for |
| expansions in the configuration file.</p> |
| |
| <p>The maximum length of a line in normal configuration files, after |
| variable substitution and joining any continued lines, is approximately |
| 16 MiB. In <a href="configuring.html#htaccess">.htaccess files</a>, the |
| maximum length is 8190 characters.</p> |
| |
| <p>You can check your configuration files for syntax errors |
| without starting the server by using <code>apachectl |
| configtest</code> or the <code>-t</code> command line |
| option.</p> |
| |
| <p>You can use <code class="module"><a href="./mod/mod_info.html">mod_info</a></code>'s <code>-DDUMP_CONFIG</code> to |
| dump the configuration with all included files and environment |
| variables resolved and all comments and non-matching |
| <code class="directive"><a href="./mod/core.html#ifdefine"><IfDefine></a></code> and |
| <code class="directive"><a href="./mod/core.html#ifmodule"><IfModule></a></code> sections |
| removed. However, the output does not reflect the merging or overriding |
| that may happen for repeated directives.</p> |
| </div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div> |
| <div class="section"> |
| <h2><a name="modules" id="modules">Modules</a></h2> |
| |
| |
| <table class="related"><tr><th>Related Modules</th><th>Related Directives</th></tr><tr><td><ul><li><code class="module"><a href="./mod/mod_so.html">mod_so</a></code></li></ul></td><td><ul><li><code class="directive"><a href="./mod/core.html#ifmodule"><IfModule></a></code></li><li><code class="directive"><a href="./mod/mod_so.html#loadmodule">LoadModule</a></code></li></ul></td></tr></table> |
| |
| <p>httpd is a modular server. This implies that only the most |
| basic functionality is included in the core server. Extended |
| features are available through <a href="mod/">modules</a> which can be loaded |
| into httpd. By default, a <a href="mod/module-dict.html#Status">base</a> set of modules is |
| included in the server at compile-time. If the server is |
| compiled to use <a href="dso.html">dynamically loaded</a> |
| modules, then modules can be compiled separately and added at |
| any time using the <code class="directive"><a href="./mod/mod_so.html#loadmodule">LoadModule</a></code> |
| directive. |
| Otherwise, httpd must be recompiled to add or remove modules. |
| Configuration directives may be included conditional on a |
| presence of a particular module by enclosing them in an <code class="directive"><a href="./mod/core.html#ifmodule"><IfModule></a></code> block. However, |
| <code class="directive"><IfModule></code> blocks are not |
| required, and in some cases may mask the fact that you're missing an |
| important module.</p> |
| |
| <p>To see which modules are currently compiled into the server, |
| you can use the <code>-l</code> command line option. You can also |
| see what modules are loaded dynamically using the <code>-M</code> |
| command line option.</p> |
| </div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div> |
| <div class="section"> |
| <h2><a name="scope" id="scope">Scope of Directives</a></h2> |
| |
| |
| <table class="related"><tr><th>Related Modules</th><th>Related Directives</th></tr><tr><td /><td><ul><li><code class="directive"><a href="./mod/core.html#directory"><Directory></a></code></li><li><code class="directive"><a href="./mod/core.html#directorymatch"><DirectoryMatch></a></code></li><li><code class="directive"><a href="./mod/core.html#files"><Files></a></code></li><li><code class="directive"><a href="./mod/core.html#filesmatch"><FilesMatch></a></code></li><li><code class="directive"><a href="./mod/core.html#location"><Location></a></code></li><li><code class="directive"><a href="./mod/core.html#locationmatch"><LocationMatch></a></code></li><li><code class="directive"><a href="./mod/core.html#virtualhost"><VirtualHost></a></code></li></ul></td></tr></table> |
| |
| <p>Directives placed in the main configuration files apply to |
| the entire server. If you wish to change the configuration for |
| only a part of the server, you can scope your directives by |
| placing them in <code class="directive"><a href="./mod/core.html#directory"><Directory></a></code>, <code class="directive"><a href="./mod/core.html#directorymatch"><DirectoryMatch></a></code>, <code class="directive"><a href="./mod/core.html#files"><Files></a></code>, <code class="directive"><a href="./mod/core.html#filesmatch"><FilesMatch></a></code>, <code class="directive"><a href="./mod/core.html#location"><Location></a></code>, and <code class="directive"><a href="./mod/core.html#locationmatch"><LocationMatch></a></code> |
| sections. These sections limit the application of the |
| directives which they enclose to particular filesystem |
| locations or URLs. They can also be nested, allowing for very |
| fine grained configuration.</p> |
| |
| <p>httpd has the capability to serve many different websites |
| simultaneously. This is called <a href="vhosts/">Virtual |
| Hosting</a>. Directives can also be scoped by placing them |
| inside <code class="directive"><a href="./mod/core.html#virtualhost"><VirtualHost></a></code> |
| sections, so that they will only apply to requests for a |
| particular website.</p> |
| |
| <p>Although most directives can be placed in any of these |
| sections, some directives do not make sense in some contexts. |
| For example, directives controlling process creation can only |
| be placed in the main server context. To find which directives |
| can be placed in which sections, check the <a href="mod/directive-dict.html#Context">Context</a> of the |
| directive. For further information, we provide details on <a href="sections.html">How Directory, Location and Files sections |
| work</a>.</p> |
| </div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div> |
| <div class="section"> |
| <h2><a name="htaccess" id="htaccess">.htaccess Files</a></h2> |
| |
| |
| <table class="related"><tr><th>Related Modules</th><th>Related Directives</th></tr><tr><td /><td><ul><li><code class="directive"><a href="./mod/core.html#accessfilename">AccessFileName</a></code></li><li><code class="directive"><a href="./mod/core.html#allowoverride">AllowOverride</a></code></li></ul></td></tr></table> |
| |
| <p>httpd allows for decentralized management of configuration |
| via special files placed inside the web tree. The special files |
| are usually called <code>.htaccess</code>, but any name can be |
| specified in the <code class="directive"><a href="./mod/core.html#accessfilename">AccessFileName</a></code> |
| directive. Directives placed in <code>.htaccess</code> files |
| apply to the directory where you place the file, and all |
| sub-directories. The <code>.htaccess</code> files follow the |
| same syntax as the main configuration files. Since |
| <code>.htaccess</code> files are read on every request, changes |
| made in these files take immediate effect.</p> |
| |
| <p>To find which directives can be placed in |
| <code>.htaccess</code> files, check the <a href="mod/directive-dict.html#Context">Context</a> of the |
| directive. The server administrator further controls what |
| directives may be placed in <code>.htaccess</code> files by |
| configuring the <code class="directive"><a href="./mod/core.html#allowoverride">AllowOverride</a></code> |
| directive in the main configuration files.</p> |
| |
| <p>For more information on <code>.htaccess</code> files, see |
| the <a href="howto/htaccess.html">.htaccess tutorial</a>.</p> |
| </div></div> |
| <div class="bottomlang"> |
| <p><span>Available Languages: </span><a href="./de/configuring.html" hreflang="de" rel="alternate" title="Deutsch"> de </a> | |
| <a href="./en/configuring.html" title="English"> en </a> | |
| <a href="./fr/configuring.html" hreflang="fr" rel="alternate" title="Français"> fr </a> | |
| <a href="./ja/configuring.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> | |
| <a href="./ko/configuring.html" hreflang="ko" rel="alternate" title="Korean"> ko </a> | |
| <a href="./tr/configuring.html" hreflang="tr" rel="alternate" title="Türkçe"> tr </a></p> |
| </div><div class="top"><a href="#page-header"><img src="./images/up.gif" alt="top" /></a></div><div class="section"><h2><a id="comments_section" name="comments_section">Comments</a></h2><div class="warning"><strong>Notice:</strong><br />This is not a Q&A section. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed by our moderators if they are either implemented or considered invalid/off-topic. Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Freenode, or sent to our <a href="https://httpd.apache.org/lists.html">mailing lists</a>.</div> |
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