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<a href="../libudev/index.html">gudev </a><span style="float:right">systemd 215</span><hr><div class="refentry"><a name="hostname"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>hostname — Local hostname configuration file</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><p><code class="filename">/etc/hostname</code></p></div><div class="refsect1"><a name="idm214180092048"></a><h2 id="Description">Description<a class="headerlink" title="Permalink to this headline" href="#Description">¶</a></h2><p>The <code class="filename">/etc/hostname</code> file
configures the name of the local system that is set
during boot using the
<a href="sethostname.html"><span class="citerefentry"><span class="refentrytitle">sethostname</span>(2)</span></a>
system call. It should contain a single
newline-terminated hostname string. The
hostname may be a free-form string up to 64 characters
in length; however, it is recommended that it consists
only of 7-bit ASCII lower-case characters and no spaces or dots,
and limits itself to the format allowed for DNS domain
name labels, even though this is not a
strict requirement.</p><p>Depending on the operating system, other
configuration files might be checked for configuration
of the hostname as well, however only as fallback.</p><p>You may use
<a href="hostnamectl.html"><span class="citerefentry"><span class="refentrytitle">hostnamectl</span>(1)</span></a>
to change the value of this file from the command
line.</p></div><div class="refsect1"><a name="idm214181007760"></a><h2 id="History">History<a class="headerlink" title="Permalink to this headline" href="#History">¶</a></h2><p>The simple configuration file format of
<code class="filename">/etc/hostname</code> originates from
Debian GNU/Linux.</p></div><div class="refsect1"><a name="idm214180591920"></a><h2 id="See Also">See Also<a class="headerlink" title="Permalink to this headline" href="#See%20Also">¶</a></h2><p>
<a href="systemd.html"><span class="citerefentry"><span class="refentrytitle">systemd</span>(1)</span></a>,
<a href="sethostname.html"><span class="citerefentry"><span class="refentrytitle">sethostname</span>(2)</span></a>,
<a href="hostname.html"><span class="citerefentry"><span class="refentrytitle">hostname</span>(1)</span></a>,
<a href="hostname.html"><span class="citerefentry"><span class="refentrytitle">hostname</span>(7)</span></a>,
<a href="machine-id.html"><span class="citerefentry"><span class="refentrytitle">machine-id</span>(5)</span></a>,
<a href="machine-info.html"><span class="citerefentry"><span class="refentrytitle">machine-info</span>(5)</span></a>,
<a href="hostnamectl.html"><span class="citerefentry"><span class="refentrytitle">hostnamectl</span>(1)</span></a>,
<a href="systemd-hostnamed.service.html"><span class="citerefentry"><span class="refentrytitle">systemd-hostnamed.service</span>(8)</span></a>
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