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<span id="Configuring-Init"></span><div class="header">
<p>
Next: <a href="Init-Hooks.html" accesskey="n" rel="next">Init Hooks</a>, Up: <a href="Init-System.html" accesskey="u" rel="up">Init System</a> </p>
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<hr>
<span id="Configuring-Init-1"></span><h3 class="section">4.1 Configuring Init</h3>
<p>There are three ways you can change the behaviour of the init system. Those are:
</p>
<ol>
<li> Kernel Command Line
</li><li> <samp>/etc/init/rc.conf</samp> file
</li><li> Init Hooks
</li></ol>
<span id="Kernel-Command-Line"></span><h4 class="subsection">4.1.1 Kernel Command Line</h4>
<p>On GRUB, you can edit the kernel command line parameters, which will be parsed
as variables on the init system. Not all of the parameters will be acted upon,
but all of them will be set as variables on the init script. For example an
example command line, and how it is interpreted.
</p>
<div class="example">
<pre class="example">BOOT_IMAGE=/boot/vmlinuz root=/dev/sda2 rw loglevel=3 quiet
</pre></div>
<p>This command line will be parsed to set the following variables:
</p>
<div class="example">
<pre class="example">BOOT_IMAGE=/boot/vmlinuz
root=/dev/sda2
rw=1
loglevel=3
quiet=1
</pre></div>
<p>Some of these variables, such as <code>rw</code>/<code>ro</code>, <code>loglevel</code>, and
<code>quiet</code>, will be used by the init system to change the behaviour of the
startup.
</p>
<span id="g_t_002fetc_002finit_002frc_002econf-file"></span><h4 class="subsection">4.1.2 <samp>/etc/init/rc.conf</samp> file</h4>
<p>However, the kernel command line isn’t the only place to set your boot
parameters. You can specify variables here as well, although note that the
kernel command line always gets the priority for these variables since they can
be set just before boot.
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