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<h1 id="introduction">Introduction<a class="headerlink" href="#introduction" title="Permanent link"></a></h1>
<p><a class="glightbox" data-type="image" data-width="100%" data-height="auto" href="logo.png" data-desc-position="bottom"><img align="right" alt="Infix - Linux &lt;3 NETCONF" src="logo.png" width="480"></a></p>
<p>Welcome to Infix, your immutable, friendly, and secure operating system!
On these pages you can find both user and developer documentation.</p>
<p>Most topics on configuring the system include CLI examples, but every
setting, as well as status read-back from the operational datastore, is
also possible to perform using NETCONF or RESTCONF. In fact, the Infix
regression test system solely relies on NETCONF and RESTCONF.</p>
<div class="admonition tip">
<p class="admonition-title">Tip</p>
<p>The CLI documentation is also available from inside the CLI itself
using the <code>help</code> command in admin-exec mode.</p>
</div>
<p>This document provides an introduction of key concepts, details how
the system boots, including failure modes, and provides links to
other documents for further study.</p>
<h2 id="project-links">Project Links<a class="headerlink" href="#project-links" title="Permanent link"></a></h2>
<table>
<thead>
<tr>
<th><strong>Topic</strong></th>
<th><strong>URL</strong></th>
</tr>
</thead>
<tbody>
<tr>
<td><span class="twemoji"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><!--! Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M277.8 8.6c-12.3-11.4-31.3-11.4-43.5 0l-224 208c-9.6 9-12.8 22.9-8 35.1S18.8 272 32 272h16v176c0 35.3 28.7 64 64 64h288c35.3 0 64-28.7 64-64V272h16c13.2 0 25-8.1 29.8-20.3s1.6-26.2-8-35.1zM240 320h32c26.5 0 48 21.5 48 48v96H192v-96c0-26.5 21.5-48 48-48"></path></svg></span> Home page &amp; blog</td>
<td><a href="https://www.kernelkit.org">https://www.kernelkit.org</a></td>
</tr>
<tr>
<td><span class="twemoji"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><!--! Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M173.9 397.4c0 2-2.3 3.6-5.2 3.6-3.3.3-5.6-1.3-5.6-3.6 0-2 2.3-3.6 5.2-3.6 3-.3 5.6 1.3 5.6 3.6m-31.1-4.5c-.7 2 1.3 4.3 4.3 4.9 2.6 1 5.6 0 6.2-2s-1.3-4.3-4.3-5.2c-2.6-.7-5.5.3-6.2 2.3m44.2-1.7c-2.9.7-4.9 2.6-4.6 4.9.3 2 2.9 3.3 5.9 2.6 2.9-.7 4.9-2.6 4.6-4.6-.3-1.9-3-3.2-5.9-2.9M252.8 8C114.1 8 8 113.3 8 252c0 110.9 69.8 205.8 169.5 239.2 12.8 2.3 17.3-5.6 17.3-12.1 0-6.2-.3-40.4-.3-61.4 0 0-70 15-84.7-29.8 0 0-11.4-29.1-27.8-36.6 0 0-22.9-15.7 1.6-15.4 0 0 24.9 2 38.6 25.8 21.9 38.6 58.6 27.5 72.9 20.9 2.3-16 8.8-27.1 16-33.7-55.9-6.2-112.3-14.3-112.3-110.5 0-27.5 7.6-41.3 23.6-58.9-2.6-6.5-11.1-33.3 2.6-67.9 20.9-6.5 69 27 69 27 20-5.6 41.5-8.5 62.8-8.5s42.8 2.9 62.8 8.5c0 0 48.1-33.6 69-27 13.7 34.7 5.2 61.4 2.6 67.9 16 17.7 25.8 31.5 25.8 58.9 0 96.5-58.9 104.2-114.8 110.5 9.2 7.9 17 22.9 17 46.4 0 33.7-.3 75.4-.3 83.6 0 6.5 4.6 14.4 17.3 12.1C436.2 457.8 504 362.9 504 252 504 113.3 391.5 8 252.8 8M105.2 352.9c-1.3 1-1 3.3.7 5.2 1.6 1.6 3.9 2.3 5.2 1 1.3-1 1-3.3-.7-5.2-1.6-1.6-3.9-2.3-5.2-1m-10.8-8.1c-.7 1.3.3 2.9 2.3 3.9 1.6 1 3.6.7 4.3-.7.7-1.3-.3-2.9-2.3-3.9-2-.6-3.6-.3-4.3.7m32.4 35.6c-1.6 1.3-1 4.3 1.3 6.2 2.3 2.3 5.2 2.6 6.5 1 1.3-1.3.7-4.3-1.3-6.2-2.2-2.3-5.2-2.6-6.5-1m-11.4-14.7c-1.6 1-1.6 3.6 0 5.9s4.3 3.3 5.6 2.3c1.6-1.3 1.6-3.9 0-6.2-1.4-2.3-4-3.3-5.6-2"></path></svg></span> GitHub</td>
<td><a href="https://github.com/kernelkit/infix">https://github.com/kernelkit/infix</a></td>
</tr>
<tr>
<td><span class="twemoji"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 640 512"><!--! Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M560.3 237.2c10.4 11.8 28.3 14.4 41.8 5.5 14.7-9.8 18.7-29.7 8.9-44.4l-48-72c-2.8-4.2-6.6-7.7-11.1-10.2L351.4 4.7C332.1-6 308.6-6 289.2 4.7L88.8 116c-5.4 3-9.7 7.4-12.6 12.8l-48.5 89.9c-12.6 23.4-3.8 52.5 19.6 65.1l33 17.7v53.3c0 23 12.4 44.3 32.4 55.7l176 99.7c19.6 11.1 43.5 11.1 63.1 0l176-99.7c20.1-11.4 32.4-32.6 32.4-55.7V237.3zm-240-9.8L170.2 144l150.1-83.4L470.4 144zm-41.5 50.2-21.3 46.2L91.7 235l25.4-47.2z"></path></svg></span> Latest release</td>
<td><a href="https://github.com/kernelkit/infix/releases/latest">https://github.com/kernelkit/infix/releases/latest</a></td>
</tr>
</tbody>
</table>
<h2 id="command-line-interface">Command Line Interface<a class="headerlink" href="#command-line-interface" title="Permanent link"></a></h2>
<p>The command line interface (CLI, see-ell-i) is the traditional way of
interacting with single network equipment like switches and routers.
Today users have come to expect more advanced graphical GUIs, like a web
interface, to manage a device or NETCONF-based tools that allow for
managing entire fleets of installed equipment.</p>
<p>Nevertheless, when it comes to initial deployment and debugging, it
is very useful to know how to navigate and use the CLI.</p>
<div class="admonition info">
<p class="admonition-title">Info</p>
<p>For more information, see the <a href="cli/introduction/">CLI Introduction</a>
and the <a href="cli/configure/">CLI Configuration Tutorial</a>.</p>
</div>
<h2 id="key-concepts">Key Concepts<a class="headerlink" href="#key-concepts" title="Permanent link"></a></h2>
<p>The two modes in the CLI are the admin-exec and the configure context.</p>
<p>However, when logging in to the system, from the console port or SSH,
you land in a standard UNIX shell, Bash. This is for advanced users
and remote scripting purposes (production equipment):</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-0-1" name="__codelineno-0-1" href="#__codelineno-0-1"></a> Run the command 'cli' for interactive OAM
<a id="__codelineno-0-2" name="__codelineno-0-2" href="#__codelineno-0-2"></a>
<a id="__codelineno-0-3" name="__codelineno-0-3" href="#__codelineno-0-3"></a> admin@example:~$
</code></pre></div>
<p>To enter the CLI, follow the instructions, for interactive Operations,
Administration, and Management (OAM), type:</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-1-1" name="__codelineno-1-1" href="#__codelineno-1-1"></a> admin@example:~$ cli
<a id="__codelineno-1-2" name="__codelineno-1-2" href="#__codelineno-1-2"></a> admin@example:/&gt;
</code></pre></div>
<p>The prompt, constructed from your username and the device's hostname,
changes slightly. You are now in the admin-exec context of the CLI.
Here you can inspect system status and do operations to debug networking
issues, e.g. ping. You can also enter configure context by typing:
<code>configure</code> followed by commands to <code>set</code>, <code>edit</code>, apply changes using
<code>leave</code>, or <code>abort</code> and return to admin-exec.</p>
<div class="admonition tip">
<p class="admonition-title">Tip</p>
<p>If you haven't already, the <a href="cli/introduction/">CLI Introduction</a>
would be useful to skim through at this point.</p>
</div>
<h2 id="datastores">Datastores<a class="headerlink" href="#datastores" title="Permanent link"></a></h2>
<p>The system has several datastores (or files):</p>
<ul>
<li><code>factory-config</code> consists of a set of default configurations, some
static and others generated per-device, e.g., a unique hostname and
number of ports/interfaces. This file is generated at boot.</li>
<li><code>failure-config</code> is also generated at boot, from the same YANG models
as <code>factory-config</code>, and holds the system <em>Fail Secure Mode</em></li>
<li><code>startup-config</code> is created from <code>factory-config</code> at boot if it does
not exist. It is loaded as the system configuration on each boot.</li>
<li><code>running-config</code> is what is actively running on the system. If no
changes have been made since the system booted, it is the same as
<code>startup-config</code>.</li>
<li><code>candidate-config</code> is created from <code>running-config</code> when entering the
configure context. Any changes made here can be discarded (<code>abort</code>,
<code>rollback</code>) or committed (<code>commit</code>, <code>leave</code>) to <code>running-config</code>.</li>
</ul>
<div class="admonition tip">
<p class="admonition-title">Tip</p>
<p>Please see the <a href="branding/">Branding &amp; Releases</a> document for more
in-depth information on how <code>factory-config</code> and <code>failure-config</code> can
be adapted to different customer requirements. Including how you can
override the generated versions of these files with plain per-product
ones -- this may even protect against some of the failure modes below.</p>
</div>
</article>
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