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<title>rotatelogs - Piped logging program to rotate Apache logs - Apache HTTP Server</title>
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<p class="apache">Apache HTTP Server Version 2.0</p>
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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 2.0</a> > <a href="./">Programs</a></div><div id="page-content"><div id="preamble"><h1>rotatelogs - Piped logging program to rotate Apache logs</h1>
<div class="toplang">
<p><span>Available Languages: </span><a href="../en/programs/rotatelogs.html" title="English"> en </a> |
<a href="../ko/programs/rotatelogs.html" hreflang="ko" rel="alternate" title="Korean"> ko </a> |
<a href="../tr/programs/rotatelogs.html" hreflang="tr" rel="alternate" title="T�rk�e"> tr </a></p>
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<p><code>rotatelogs</code> is a simple program for use in
conjunction with Apache's piped logfile feature. For example:</p>
<div class="example"><p><code>
CustomLog "|bin/rotatelogs /var/logs/logfile 86400" common
</code></p></div>
<p>This creates the files /var/logs/logfile.nnnn where nnnn is
the system time at which the log nominally starts (this time
will always be a multiple of the rotation time, so you can
synchronize cron scripts with it). At the end of each rotation
time (here after 24 hours) a new log is started.</p>
<div class="example"><p><code>
CustomLog "|bin/rotatelogs /var/logs/logfile 5M" common
</code></p></div>
<p>This configuration will rotate the logfile whenever it reaches
a size of 5 megabytes.</p>
<div class="example"><p><code>
ErrorLog "|bin/rotatelogs /var/logs/errorlog.%Y-%m-%d-%H_%M_%S 5M"
</code></p></div>
<p>This configuration will rotate the error logfile whenever it
reaches a size of 5 megabytes, and the suffix to the logfile name
will be created of the form
<code>errorlog.YYYY-mm-dd-HH_MM_SS</code>.</p>
</div>
<div id="quickview"><ul id="toc"><li><img alt="" src="../images/down.gif" /> <a href="#synopsis">Synopsis</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#options">Options</a></li>
<li><img alt="" src="../images/down.gif" /> <a href="#portability">Portability</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="synopsis" id="synopsis">Synopsis</a></h2>
<p><code><strong>rotatelogs</strong>
[ -<strong>l</strong> ]
<var>logfile</var>
[ <var>rotationtime</var> [ <var>offset</var> ]] |
[ <var>filesize</var>M ]</code></p>
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="options" id="options">Options</a></h2>
<dl>
<dt><code>-l</code> (<em>2.0.51 and later</em>)</dt>
<dd>Causes the use of local time rather than GMT as the base for the
interval. Note that using <code>-l</code> in an environment which changes the
GMT offset (such as for BST or DST) can lead to unpredictable results!</dd>
<dt><code><var>logfile</var></code></dt>
<dd>The path plus basename of the logfile. If <var>logfile</var>
includes any '%' characters, it is treated as a format string for
<code>strftime(3)</code>. Otherwise, the suffix
<var>.nnnnnnnnnn</var> is automatically added and is the time in
seconds. Both formats compute the start time from the beginning of
the current period.</dd>
<dt><code><var>rotationtime</var></code></dt>
<dd>The time between log file rotations in seconds.</dd>
<dt><code><var>offset</var></code></dt>
<dd>The number of minutes offset from UTC. If omitted, zero is
assumed and UTC is used. For example, to use local time in the zone
UTC -5 hours, specify a value of <code>-300</code> for this argument.</dd>
<dt><code><var>filesize</var>M</code></dt>
<dd>The maximum file size in megabytes followed by the letter
<code>M</code> to specify size rather than time. Use this parameter
in place of both rotationtime and offset.</dd>
</dl>
</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
<div class="section">
<h2><a name="portability" id="portability">Portability</a></h2>
<p>The following logfile format string substitutions should be
supported by all <code>strftime(3)</code> implementations, see
the <code>strftime(3)</code> man page for library-specific
extensions.</p>
<table class="bordered"><tr><td><code>%A</code></td><td>full weekday name (localized)</td></tr>
<tr class="odd"><td><code>%a</code></td><td>3-character weekday name (localized)</td></tr>
<tr><td><code>%B</code></td><td>full month name (localized)</td></tr>
<tr class="odd"><td><code>%b</code></td><td>3-character month name (localized)</td></tr>
<tr><td><code>%c</code></td><td>date and time (localized)</td></tr>
<tr class="odd"><td><code>%d</code></td><td>2-digit day of month</td></tr>
<tr><td><code>%H</code></td><td>2-digit hour (24 hour clock)</td></tr>
<tr class="odd"><td><code>%I</code></td><td>2-digit hour (12 hour clock)</td></tr>
<tr><td><code>%j</code></td><td>3-digit day of year</td></tr>
<tr class="odd"><td><code>%M</code></td><td>2-digit minute</td></tr>
<tr><td><code>%m</code></td><td>2-digit month</td></tr>
<tr class="odd"><td><code>%p</code></td><td>am/pm of 12 hour clock (localized)</td></tr>
<tr><td><code>%S</code></td><td>2-digit second</td></tr>
<tr class="odd"><td><code>%U</code></td><td>2-digit week of year
(Sunday first day of week)</td></tr>
<tr><td><code>%W</code></td><td>2-digit week of year
(Monday first day of week)</td></tr>
<tr class="odd"><td><code>%w</code></td><td>1-digit weekday
(Sunday first day of week)</td></tr>
<tr><td><code>%X</code></td><td>time (localized)</td></tr>
<tr class="odd"><td><code>%x</code></td><td>date (localized)</td></tr>
<tr><td><code>%Y</code></td><td>4-digit year</td></tr>
<tr class="odd"><td><code>%y</code></td><td>2-digit year</td></tr>
<tr><td><code>%Z</code></td><td>time zone name</td></tr>
<tr class="odd"><td><code>%%</code></td><td>literal `%'</td></tr>
</table>
</div></div>
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<p><span>Available Languages: </span><a href="../en/programs/rotatelogs.html" title="English"> en </a> |
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<a href="../tr/programs/rotatelogs.html" hreflang="tr" rel="alternate" title="T�rk�e"> tr </a></p>
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