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<title>s6-linux-utils - skarnet's tiny Linux-specific utilities</title>
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<p>
<a href="//skarnet.org/software/">Software</a><br />
<a href="//skarnet.org/">skarnet.org</a>
</p>
<h1> s6-linux-utils </h1>
<h2> What is it ? </h2>
<p>
s6-linux-utils is a set of minimalistic Linux-specific system utilities.
</p>
<hr />
<h2> Installation </h2>
<h3> Requirements </h3>
<ul>
<li> A Linux-based system with a standard C development environment.
The Linux kernel must be 3.5 or later. </li>
<li> GNU make, version 3.81 or later </li>
<li> <a href="//skarnet.org/software/skalibs/">skalibs</a> version
2.5.1.0 or later. It's a build-time requirement. It's also a run-time
requirement if you link against the shared version of the skalibs
library. </li>
</ul>
<h3> Licensing </h3>
<p>
s6-linux-utils is free software. It is available under the
<a href="http://opensource.org/licenses/ISC">ISC license</a>.
</p>
<h3> Download </h3>
<ul>
<li> The current released version of s6-linux-utils is
<a href="s6-linux-utils-2.4.0.0.tar.gz">2.4.0.0</a>. </li>
<li> Alternatively, you can checkout a copy of the
<a href="http://git.skarnet.org/cgi-bin/cgit.cgi/s6-linux-utils/">s6-linux-utils
git repository</a>:
<pre> git clone git://git.skarnet.org/s6-linux-utils </pre> </li>
<li> There's also a
<a href="https://github.com/skarnet/s6-linux-utils">GitHub mirror</a>
of the s6-linux-utils git repository. </li>
</ul>
<h3> Compilation </h3>
<ul>
<li> See the enclosed INSTALL file for installation details. </li>
</ul>
<h3> Upgrade notes </h3>
<ul>
<li> <a href="upgrade.html">This page</a> lists the differences to be aware of between
the previous versions of s6-linux-utils and the current one. </li>
</ul>
<hr />
<h2> Reference </h2>
<h3> Commands </h3>
<p>
All these commands exit 111 if they encounter a temporary error, and
100 if they encounter a permanent error - such as a misuse.
</p>
<ul>
<li><a href="s6-chroot.html">The <tt>s6-chroot</tt> program</a></li>
<li><a href="s6-devd.html">The <tt>s6-devd</tt> program</a></li>
<li><a href="s6-uevent-listener.html">The <tt>s6-uevent-listener</tt> program</a></li>
<li><a href="s6-uevent-spawner.html">The <tt>s6-uevent-spawner</tt> program</a></li>
<li><a href="s6-fillurandompool.html">The <tt>s6-fillurandompool</tt> program</a></li>
<li><a href="s6-freeramdisk.html">The <tt>s6-freeramdisk</tt> program</a></li>
<li><a href="s6-hostname.html">The <tt>s6-hostname</tt> program</a></li>
<li><a href="s6-logwatch.html">The <tt>s6-logwatch</tt> program</a></li>
<li><a href="s6-mount.html">The <tt>s6-mount</tt> program</a></li>
<li><a href="s6-pivotchroot.html">The <tt>s6-pivotchroot</tt> program</a></li>
<li><a href="s6-ps.html">The <tt>s6-ps</tt> program</a></li>
<li><a href="s6-swapoff.html">The <tt>s6-swapoff</tt> program</a></li>
<li><a href="s6-swapon.html">The <tt>s6-swapon</tt> program</a></li>
<li><a href="s6-umount.html">The <tt>s6-umount</tt> program</a></li>
</ul>
<h2> Related resources </h2>
<ul>
<li> <tt>s6-linux-utils</tt> is discussed on the
<a href="//skarnet.org/lists.html#skaware">skaware</a> mailing-list. </li>
</ul>
<h2> Similar work </h2>
<p>
There are several good projects aiming to provide a minimal userspace
environment for Linux, suitable for embedded systems. Among them, for
instance:
</p>
<ul>
<li> <a href="http://busybox.net/">BusyBox</a> </li>
<li> <a href="http://landley.net/code/toybox/">toybox</a> </li>
</ul>
<p>
Most of the time, these projects aim to implement standard commands in a
lightweight way, and
they do it well enough. So, although some standard reimplentation already
exists in s6-linux-utils and its sibling package
<a href="//skarnet.org/software/s6-portable-utils/">s6-portable-utils</a>,
it is an explicit non-goal of those packages to duplicate the work of those
projects, and no more rewriting of standard commands will occur.
</p>
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