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<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>systemd-gpt-auto-generator</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><style>
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</style><a href="index.html">Index </a>·
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<a href="systemd.directives.html">Directives </a>·
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<a href="../python-systemd/index.html">Python </a>·
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<a href="../libudev/index.html">libudev </a>·
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<a href="../libudev/index.html">gudev </a><span style="float:right">systemd 217</span><hr><div class="refentry"><a name="systemd-gpt-auto-generator"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>systemd-gpt-auto-generator — Generator for automatically discovering
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and mounting root, <code class="filename">/home</code> and
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<code class="filename">/srv</code> partitions, as well as
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discovering and enabling swap partitions, based on GPT
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partition type GUIDs.</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><p><code class="filename">/usr/lib/systemd/system-generators/systemd-gpt-auto-generator</code></p></div><div class="refsect1"><a name="idm214176858576"></a><h2 id="Description">Description<a class="headerlink" title="Permalink to this headline" href="#Description">¶</a></h2><p><code class="filename">systemd-gpt-auto-generator</code>
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is a unit generator that automatically discovers root,
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<code class="filename">/home</code>, <code class="filename">/srv</code>
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and swap partitions and creates mount and swap units
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for them, based on the partition type GUIDs of
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GUID partition tables (GPT). It implements the <a class="ulink" href="http://www.freedesktop.org/wiki/Specifications/DiscoverablePartitionsSpec/" target="_top">Discoverable
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Partitions Specification</a>. Note that this
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generator has no effect on non-GPT systems, on systems
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where the units are explicitly configured (for
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example, listed in
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<a href="fstab.html"><span class="citerefentry"><span class="refentrytitle">fstab</span>(5)</span></a>),
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or where the mount points are non-empty.</p><p>This generator will only look for root
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partitions on the same physical disk the EFI System
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Partition (ESP) is located on. It will only look for
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the other partitions on the same physical disk the
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root file system is located on. These partitions will
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not be searched on systems where the root file system is
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distributed on multiple disks, for example via btrfs
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RAID.</p><p><code class="filename">systemd-gpt-auto-generator</code>
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is useful for centralizing file system configuration
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in the partition table and making manual configuration
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in <code class="filename">/etc/fstab</code> or suchlike
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unnecessary.</p><p>This generator looks for the partitions based on
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their partition type GUID. The following partition
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type GUIDs are identified:</p><div class="table"><a name="idm214176850288"></a><p class="title"><b>Table 1. Partition Type GUIDs</b></p><div class="table-contents"><table summary="Partition Type GUIDs" border="1"><colgroup><col align="left" class="guid"><col align="left" class="name"><col align="left" class="explanation"></colgroup><thead><tr><th align="left">Partition Type GUID</th><th align="left">Name</th><th align="left">Explanation</th></tr></thead><tbody><tr><td align="left">44479540-f297-41b2-9af7-d131d5f0458a</td><td align="left"><code class="filename">Root Partition (x86)</code></td><td align="left">On 32-bit x86 systems, the first x86 root partition on the disk the EFI ESP is located on is mounted to the root directory <code class="filename">/</code>.</td></tr><tr><td align="left">4f68bce3-e8cd-4db1-96e7-fbcaf984b709</td><td align="left"><code class="filename">Root Partition (x86-64)</code></td><td align="left">On 64-bit x86 systems, the first x86-64 root partition on the disk the EFI ESP is located on is mounted to the root directory <code class="filename">/</code>.</td></tr><tr><td align="left">69dad710-2ce4-4e3c-b16c-21a1d49abed3</td><td align="left"><code class="filename">Root Partition (32-bit ARM)</code></td><td align="left">On 32-bit ARM systems, the first ARM root partition on the disk the EFI ESP is located on is mounted to the root directory <code class="filename">/</code>.</td></tr><tr><td align="left">b921b045-1df0-41c3-af44-4c6f280d3fae</td><td align="left"><code class="filename">Root Partition (64-bit ARM)</code></td><td align="left">On 64-bit ARM systems, the first ARM root partition on the disk the EFI ESP is located on is mounted to the root directory <code class="filename">/</code>.</td></tr><tr><td align="left">933ac7e1-2eb4-4f13-b844-0e14e2aef915</td><td align="left">Home Partition</td><td align="left">The first home partition on the disk the root partition is located on is mounted to <code class="filename">/home</code>.</td></tr><tr><td align="left">3b8f8425-20e0-4f3b-907f-1a25a76f98e8</td><td align="left">Server Data Partition</td><td align="left">The first server data partition on the disk the root partition is located on is mounted to <code class="filename">/srv</code>.</td></tr><tr><td align="left">0657fd6d-a4ab-43c4-84e5-0933c84b4f4f</td><td align="left">Swap</td><td align="left">All swap partitions located on the disk the root partition is located on are enabled.</td></tr></tbody></table></div></div><br class="table-break"><p>The <code class="filename">/home</code> and
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<code class="filename">/srv</code> partitions may be encrypted
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in LUKS format. In this case a device mapper device is
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set up under the names
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<code class="filename">/dev/mapper/home</code> and
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<code class="filename">/dev/mapper/srv</code>. Note that this
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might create conflicts if the same partition is listed
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in <code class="filename">/etc/crypttab</code> with a different
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device mapper device name.</p><p>Also note that
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<a href="systemd-efi-boot-generator.html"><span class="citerefentry"><span class="refentrytitle">systemd-efi-boot-generator</span>(8)</span></a>
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will mount the EFI System Partition (ESP) to
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<code class="filename">/boot</code> if not otherwise mounted.</p><p>When using this generator in conjunction with
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btrfs file systems, make sure to set the correct
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default subvolumes on them, using <span class="command"><strong>btrfs
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subvolume set-default</strong></span>.</p><p><code class="filename">systemd-gpt-auto-generator</code>
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implements the <a class="ulink" href="http://www.freedesktop.org/wiki/Software/systemd/Generators" target="_top">Generator
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Specification</a>.</p></div><div class="refsect1"><a name="idm214180764048"></a><h2 id="See Also">See Also<a class="headerlink" title="Permalink to this headline" href="#See%20Also">¶</a></h2><p>
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<a href="systemd.html"><span class="citerefentry"><span class="refentrytitle">systemd</span>(1)</span></a>,
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<a href="systemd.mount.html"><span class="citerefentry"><span class="refentrytitle">systemd.mount</span>(5)</span></a>,
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<a href="systemd.swap.html"><span class="citerefentry"><span class="refentrytitle">systemd.swap</span>(5)</span></a>,
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<a href="systemd-fstab-generator.html"><span class="citerefentry"><span class="refentrytitle">systemd-fstab-generator</span>(8)</span></a>,
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<a href="systemd-efi-boot-generator.html"><span class="citerefentry"><span class="refentrytitle">systemd-efi-boot-generator</span>(8)</span></a>,
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<a href="systemd-cryptsetup@.service.html"><span class="citerefentry"><span class="refentrytitle">systemd-cryptsetup@.service</span>(8)</span></a>,
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<a href="cryptsetup.html"><span class="citerefentry"><span class="refentrytitle">cryptsetup</span>(8)</span></a>,
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<a href="fstab.html"><span class="citerefentry"><span class="refentrytitle">fstab</span>(5)</span></a>,
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<a href="btrfs.html"><span class="citerefentry"><span class="refentrytitle">btrfs</span>(8)</span></a>
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</p></div></div></body></html>
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