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 <div id="page-content">
 <div id="preamble"><h1>Apache Module mod_env</h1>
 <div class="toplang">
 <p><span>Available Languages: </span><a href="../en/mod/mod_env.html" title="English">&nbsp;en&nbsp;</a> |
 <a href="../fr/mod/mod_env.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a> |
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 </div>
 <table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Modifies the environment which is passed to CGI scripts and
 SSI pages</td></tr>
 <tr><th><a href="module-dict.html#Status">Status:</a></th><td>Base</td></tr>
 <tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>env_module</td></tr>
 <tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_env.c</td></tr></table>
 <h3>Summary</h3>

     <p>This module allows for control of internal environment variables that
     are used by various Apache HTTP Server modules. These variables are also
     provided to CGI scripts as native system environment variables, and available
     for use in SSI pages. Environment variables may be passed from the shell
     which invoked the <code class="program"><a href="../programs/httpd.html">httpd</a></code> process. Alternatively,
     environment variables may be set or unset within the configuration process.</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><h3 class="directives">Directives</h3>
 <ul id="toc">
 <li><img alt="" src="../images/down.gif" /> <a href="#passenv">PassEnv</a></li>
 <li><img alt="" src="../images/down.gif" /> <a href="#setenv">SetEnv</a></li>
 <li><img alt="" src="../images/down.gif" /> <a href="#unsetenv">UnsetEnv</a></li>
 </ul>
 <h3>Bugfix checklist</h3><ul class="seealso"><li><a href="https://www.apache.org/dist/httpd/CHANGES_2.4">httpd changelog</a></li><li><a href="https://bz.apache.org/bugzilla/buglist.cgi?bug_status=__open__&amp;list_id=144532&amp;product=Apache%20httpd-2&amp;query_format=specific&amp;order=changeddate%20DESC%2Cpriority%2Cbug_severity&amp;component=mod_env">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&amp;component=mod_env">Report a bug</a></li></ul><h3>See also</h3>
 <ul class="seealso">
 <li><a href="../env.html">Environment Variables</a></li>
 <li><code class="directive"><a href="../mod/mod_setenvif.html#setenvif">SetEnvIf</a></code></li>
 <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="directive-section"><h2><a name="PassEnv" id="PassEnv">PassEnv</a> <a name="passenv" id="passenv">Directive</a></h2>
 <table class="directive">
 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Passes environment variables from the shell</td></tr>
 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>PassEnv <var>env-variable</var> [<var>env-variable</var>]
 ...</code></td></tr>
 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_env</td></tr>
 </table>
     <p>Specifies one or more native system environment variables to make available
     as internal environment variables, which are available to Apache HTTP Server modules
     as well as propagated to CGI scripts and SSI pages. Values come from the
     native OS environment of the shell which invoked the
     <code class="program"><a href="../programs/httpd.html">httpd</a></code> process.</p>

     <div class="example"><h3>Example</h3><pre class="prettyprint lang-config">PassEnv LD_LIBRARY_PATH</pre>
 </div>

 </div>
 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
 <div class="directive-section"><h2><a name="SetEnv" id="SetEnv">SetEnv</a> <a name="setenv" id="setenv">Directive</a></h2>
 <table class="directive">
 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sets environment variables</td></tr>
 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SetEnv <var>env-variable</var> [<var>value</var>]</code></td></tr>
 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_env</td></tr>
 </table>
     <p>Sets an internal environment variable, which is then available to Apache
     HTTP Server modules, and passed on to CGI scripts and SSI pages.</p>

     <div class="example"><h3>Example</h3><pre class="prettyprint lang-config">SetEnv SPECIAL_PATH /foo/bin</pre>
 </div>

     <p> If you omit the <var>value</var> argument, the variable is set to
     an empty string.</p>

     <div class="note"><p>The internal environment variables set by this directive are set
     <em>after</em> most early request processing directives are run, such as access
     control and URI-to-filename mapping.  If the environment variable you're
     setting is meant as input into this early phase of processing such as the
     <code class="directive"><a href="../mod/mod_rewrite.html#rewriterule">RewriteRule</a></code> directive, you should
     instead set the environment variable with
     <code class="directive"><a href="../mod/mod_setenvif.html#setenvif">SetEnvIf</a></code>.</p>
     </div>


 <h3>See also</h3>
 <ul>
 <li><a href="../env.html">Environment Variables</a></li>
 </ul>
 </div>
 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
 <div class="directive-section"><h2><a name="UnsetEnv" id="UnsetEnv">UnsetEnv</a> <a name="unsetenv" id="unsetenv">Directive</a></h2>
 <table class="directive">
 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Removes variables from the environment</td></tr>
 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>UnsetEnv <var>env-variable</var> [<var>env-variable</var>]
 ...</code></td></tr>
 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_env</td></tr>
 </table>
     <p>Removes one or more internal environment variables from those passed
     on to CGI scripts and SSI pages.</p>

     <div class="example"><h3>Example</h3><pre class="prettyprint lang-config">UnsetEnv LD_LIBRARY_PATH</pre>
 </div>

 </div>
 </div>
 <div class="bottomlang">
 <p><span>Available Languages: </span><a href="../en/mod/mod_env.html" title="English">&nbsp;en&nbsp;</a> |
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 <a href="../ko/mod/mod_env.html" hreflang="ko" rel="alternate" title="Korean">&nbsp;ko&nbsp;</a> |
 <a href="../tr/mod/mod_env.html" hreflang="tr" rel="alternate" title="Türkçe">&nbsp;tr&nbsp;</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&amp;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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	<title>mod_env - Apache HTTP Server Version 2.4</title>
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	<p class="apache">Apache HTTP Server Version 2.4</p>
	<img alt="" src="../images/feather.png" /></div>
	<div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div>
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	<div id="page-content">
	<div id="preamble"><h1>Apache Module mod_env</h1>
	<div class="toplang">
	<p><span>Available Languages: </span><a href="../en/mod/mod_env.html" title="English"> en </a> \|
	<a href="../fr/mod/mod_env.html" hreflang="fr" rel="alternate" title="Français"> fr </a> \|
	<a href="../ja/mod/mod_env.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> \|
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	<a href="../tr/mod/mod_env.html" hreflang="tr" rel="alternate" title="Türkçe"> tr </a></p>
	</div>
	<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Modifies the environment which is passed to CGI scripts and
	SSI pages</td></tr>
	<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Base</td></tr>
	<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>env_module</td></tr>
	<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_env.c</td></tr></table>
	<h3>Summary</h3>

	<p>This module allows for control of internal environment variables that
	are used by various Apache HTTP Server modules. These variables are also
	provided to CGI scripts as native system environment variables, and available
	for use in SSI pages. Environment variables may be passed from the shell
	which invoked the <code class="program"><a href="../programs/httpd.html">httpd</a></code> process. Alternatively,
	environment variables may be set or unset within the configuration process.</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><h3 class="directives">Directives</h3>
	<ul id="toc">
	<li><img alt="" src="../images/down.gif" /> <a href="#passenv">PassEnv</a></li>
	<li><img alt="" src="../images/down.gif" /> <a href="#setenv">SetEnv</a></li>
	<li><img alt="" src="../images/down.gif" /> <a href="#unsetenv">UnsetEnv</a></li>
	</ul>
	<h3>Bugfix checklist</h3><ul class="seealso"><li><a href="https://www.apache.org/dist/httpd/CHANGES_2.4">httpd changelog</a></li><li><a href="https://bz.apache.org/bugzilla/buglist.cgi?bug_status=__open__&list_id=144532&product=Apache%20httpd-2&query_format=specific&order=changeddate%20DESC%2Cpriority%2Cbug_severity&component=mod_env">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_env">Report a bug</a></li></ul><h3>See also</h3>
	<ul class="seealso">
	<li><a href="../env.html">Environment Variables</a></li>
	<li><code class="directive"><a href="../mod/mod_setenvif.html#setenvif">SetEnvIf</a></code></li>
	<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="directive-section"><h2><a name="PassEnv" id="PassEnv">PassEnv</a> <a name="passenv" id="passenv">Directive</a></h2>
	<table class="directive">
	<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Passes environment variables from the shell</td></tr>
	<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>PassEnv <var>env-variable</var> [<var>env-variable</var>]
	...</code></td></tr>
	<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
	<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
	<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
	<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_env</td></tr>
	</table>
	<p>Specifies one or more native system environment variables to make available
	as internal environment variables, which are available to Apache HTTP Server modules
	as well as propagated to CGI scripts and SSI pages. Values come from the
	native OS environment of the shell which invoked the
	<code class="program"><a href="../programs/httpd.html">httpd</a></code> process.</p>

	<div class="example"><h3>Example</h3><pre class="prettyprint lang-config">PassEnv LD_LIBRARY_PATH</pre>
	</div>

	</div>
	<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
	<div class="directive-section"><h2><a name="SetEnv" id="SetEnv">SetEnv</a> <a name="setenv" id="setenv">Directive</a></h2>
	<table class="directive">
	<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sets environment variables</td></tr>
	<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SetEnv <var>env-variable</var> [<var>value</var>]</code></td></tr>
	<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
	<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
	<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
	<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_env</td></tr>
	</table>
	<p>Sets an internal environment variable, which is then available to Apache
	HTTP Server modules, and passed on to CGI scripts and SSI pages.</p>

	<div class="example"><h3>Example</h3><pre class="prettyprint lang-config">SetEnv SPECIAL_PATH /foo/bin</pre>
	</div>

	<p> If you omit the <var>value</var> argument, the variable is set to
	an empty string.</p>

	<div class="note"><p>The internal environment variables set by this directive are set
	<em>after</em> most early request processing directives are run, such as access
	control and URI-to-filename mapping. If the environment variable you're
	setting is meant as input into this early phase of processing such as the
	<code class="directive"><a href="../mod/mod_rewrite.html#rewriterule">RewriteRule</a></code> directive, you should
	instead set the environment variable with
	<code class="directive"><a href="../mod/mod_setenvif.html#setenvif">SetEnvIf</a></code>.</p>
	</div>


	<h3>See also</h3>
	<ul>
	<li><a href="../env.html">Environment Variables</a></li>
	</ul>
	</div>
	<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
	<div class="directive-section"><h2><a name="UnsetEnv" id="UnsetEnv">UnsetEnv</a> <a name="unsetenv" id="unsetenv">Directive</a></h2>
	<table class="directive">
	<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Removes variables from the environment</td></tr>
	<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>UnsetEnv <var>env-variable</var> [<var>env-variable</var>]
	...</code></td></tr>
	<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
	<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>FileInfo</td></tr>
	<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
	<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_env</td></tr>
	</table>
	<p>Removes one or more internal environment variables from those passed
	on to CGI scripts and SSI pages.</p>

	<div class="example"><h3>Example</h3><pre class="prettyprint lang-config">UnsetEnv LD_LIBRARY_PATH</pre>
	</div>

	</div>
	</div>
	<div class="bottomlang">
	<p><span>Available Languages: </span><a href="../en/mod/mod_env.html" title="English"> en </a> \|
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	<a href="../tr/mod/mod_env.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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