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<section id="direct-linux-boot">
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<span id="direct-005flinux-005fboot"></span><h1>Direct Linux Boot<a class="headerlink" href="#direct-linux-boot" title="Link to this heading"></a></h1>
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<p>This section explains how to launch a Linux kernel inside QEMU without
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having to make a full bootable image. It is very useful for fast Linux
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kernel testing.</p>
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<p>The syntax is:</p>
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<pre class="literal-block">qemu-system-x86_64 -kernel bzImage -hda rootdisk.img -append "root=/dev/hda"</pre>
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<p>Use <code class="docutils literal notranslate"><span class="pre">-kernel</span></code> to provide the Linux kernel image and <code class="docutils literal notranslate"><span class="pre">-append</span></code> to
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give the kernel command line arguments. The <code class="docutils literal notranslate"><span class="pre">-initrd</span></code> option can be
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used to provide an INITRD image.</p>
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<p>If you do not need graphical output, you can disable it and redirect the
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virtual serial port and the QEMU monitor to the console with the
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<code class="docutils literal notranslate"><span class="pre">-nographic</span></code> option. The typical command line is:</p>
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<pre class="literal-block">qemu-system-x86_64 -kernel bzImage -hda rootdisk.img -append "root=/dev/hda console=ttyS0" -nographic</pre>
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<p>Use Ctrl-a c to switch between the serial console and the monitor (see
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<a class="reference internal" href="keys.html#gui-keys"><span class="std std-ref">Keys in the graphical frontends</span></a>).</p>
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</section>
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<p>This documentation is for QEMU version 8.2.2.</p>
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