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<section id="modify-hostname">
<span id="hostname"></span><h1>Modify hostname<a class="headerlink" href="#modify-hostname" title="Link to this heading"></a></h1>
<p>This guide describes how to modify and view the hostname of your Clear Linux* OS
system.</p>
<nav class="contents local" id="contents">
<ul class="simple">
<li><p><a class="reference internal" href="#overview" id="id1">Overview</a></p></li>
<li><p><a class="reference internal" href="#set-your-hostname" id="id2">Set your hostname</a></p></li>
<li><p><a class="reference internal" href="#view-your-hostname" id="id3">View your hostname</a></p></li>
</ul>
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<section id="overview">
<h2><a class="toc-backref" href="#id1" role="doc-backlink">Overview</a><a class="headerlink" href="#overview" title="Link to this heading"></a></h2>
<p>By default, Clear Linux OS installations have a machine generated name, which is a
long string of letters and numbers. The generated name is fine for computers
but is not human-friendly. Administrators and users will often want to rename
their machines with a name that is easier to remember, type, and search
for. Renaming a machine also makes it easier to identify, by including
meaningful data in the name. The following examples show human-friendly machine
names:</p>
<ul class="simple">
<li><p><em>regression-test</em></p></li>
<li><p><em>sally-test-box1</em></p></li>
<li><p><em>az-bldg2-lab</em></p></li>
</ul>
</section>
<section id="set-your-hostname">
<h2><a class="toc-backref" href="#id2" role="doc-backlink">Set your hostname</a><a class="headerlink" href="#set-your-hostname" title="Link to this heading"></a></h2>
<p>Clear Linux OS uses the <strong class="command">hostnamectl</strong> command to display and modify the machine
name. <strong class="command">hostnamectl</strong> is part of the <strong class="command">os-core</strong> bundle, which
provides a basic Linux* user space and utilities.</p>
<p>This example sets the hostname to <em>telemetry-test-2-h15</em>, to identify a
Clear Linux OS telemetry test machine on the second floor at grid location H15.
Make sure to reboot after setting a new hostname.</p>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>sudo<span class="w"> </span>hostnamectl<span class="w"> </span>set-hostname<span class="w"> </span>telemetry-test-2-h15
sudo<span class="w"> </span>reboot
</pre></div>
</div>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>There are three types of hostname: <em>static</em>, <em>transient</em>, and <em>pretty</em>.
The most common is the static hostname. Static hostnames must be between
two and 63 characters long, must start and end with a letter or number,
and may contain letters (case-insensitive), numbers, dashes, or dots.</p>
<p>If the static hostname exists, it is used to generate the transient hostname,
which is maintained by the kernel. The transient hostname can be changed
by DHCP or mDNS at runtime.</p>
<p>The pretty hostname is a free-form UTF8 name used for presentation to the user.</p>
</div>
</section>
<section id="view-your-hostname">
<h2><a class="toc-backref" href="#id3" role="doc-backlink">View your hostname</a><a class="headerlink" href="#view-your-hostname" title="Link to this heading"></a></h2>
<p>View your current hostname using the following command:</p>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>hostnamectl
</pre></div>
</div>
<p>You should see output similar to:</p>
<div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="go">Static hostname : telemetry-test-2-h15</span>
<span class="go">Pretty hostname : telemetry-test-2-h15</span>
<span class="go">Icon name : computer-desktop</span>
<span class="go">Chassis : desktop</span>
<span class="go">Machine ID : 4d0d60207a904ebbab96680a51ac1339</span>
<span class="go">Boot ID : 98d3514e5a984e8cbbdf46a2f0d6b397</span>
<span class="go">Operating System : Clear Linux OS</span>
<span class="go">Kernel : Linux 4.18.8-632.native</span>
<span class="go">Architecture : x86-64</span>
</pre></div>
</div>
<p><strong>Congratulations!</strong> You successfully modified the hostname of your Clear Linux OS system.</p>
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<li><a class="reference internal" href="#">Modify hostname</a><ul>
<li><a class="reference internal" href="#overview">Overview</a></li>
<li><a class="reference internal" href="#set-your-hostname">Set your hostname</a></li>
<li><a class="reference internal" href="#view-your-hostname">View your hostname</a></li>
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