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+    <title>s6-linux-init: the s6-poweroff program</title>
+    <meta name="Description" content="s6-linux-init: the s6-poweroff program" />
+    <meta name="Keywords" content="s6 linux init administration root utilities shutdown halt poweroff reboot" />
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+<p>
+<a href="index.html">s6-linux-init</a><br />
+<a href="http://skarnet.org/software/">Software</a><br />
+<a href="http://skarnet.org/">skarnet.org</a>
+</p>
+
+<h1> The <tt>s6-poweroff</tt> program </h1>
+
+<p>
+<tt>s6-poweroff</tt> sends a signal to process 1 in order to power off the machine;
+or, with the <tt>-f</tt> option, it performs an immediate hard shutdown.
+</p>
+
+<h2> Interface </h2>
+
+<pre>
+     s6-poweroff [ -h | -p | -r ] [ -f ]
+</pre>
+
+<ul>
+ <li> s6-poweroff sends a signal to process 1. </li>
+ <li> It then exits 0. </li>
+</ul>
+
+<h2> Options </h2>
+
+<ul>
+ <li> <tt>-h</tt>&nbsp;: halt. The command will order a halt (i.e. the system will
+be shut down, but the power will remain up), which means
+sending a SIGUSR2 to process 1. </li>
+ <li> <tt>-p</tt>&nbsp;: poweroff. The command will order a power off, which means
+sending a SIGUSR1 to process 1. This is the default. </li>
+ <li> <tt>-r</tt>&nbsp;: reboot. The command will order a reboot, which means
+sending a SIGINT to process 1. </li>
+ <li> <tt>-f</tt>&nbsp;: force. The command will not send any signal to process 1;
+it will just sync the filesystems then tell the kernel to halt, poweroff or reboot.
+<tt>s6-reboot -f</tt> or <tt>s6-poweroff -f</tt> should be the last program
+executed in the lifetime of a machine, at the end of the shutdown script called
+by process 1 when it receives a signal telling it to shut down. </li>
+</ul>
+
+</body>
+</html>