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<!DOCTYPE html>
<html lang="en">
<head>
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<meta content="agile sysadmin" name="title" property="og:title">
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<title>agile sysadmin</title>
</head>
<body>
<header>
<h1><a href="/">🧑💻 agile sysadmin</a></h1>
<p>by Ferenc Erki</p>
</header>
<nav>
<ul>
<li><a href="/pages/about.html">About</a></li>
<li><a href="/">Posts</a></li>
<li><a href="https://ferki.it" target="_blank">Homepage</a></li>
<li><a href="https://cal.com/ferki" target="_blank">Booking</a></li>
</ul>
</nav>
<main>
<article>
<header>
<h1><a href="/2025/04/02/rexfile-foundations/">Rexfile foundations</a></h1>
<aside>
<time datetime="2025-04-02" title="published">
🗓 2025-04-02
</time>
<a href="/tag/rex/">#rex</a>
</aside>
</header>
<section>
<p>Running ad-hoc commands as shown in <a href="/2025/03/21/minimum-viable-rex/">Minimum Viable
Rex</a> provides a good way to start benefiting
from <a href="https://www.rexify.org">Rex, the friendly automation framework</a>. Then
sometimes we have to repeat our typical procedures. Other times it would work
best if we could enable others to follow the same steps.</p>
<p>Just like GNU Make uses a Makefile to describe actions, Rex uses a Rexfile to
describe our common procedures as code through the following foundational
elements:</p>
<ul>
<li>dependencies</li>
<li>configuration</li>
<li>inventory</li>
<li>authentication</li>
<li>tasks</li>
<li>arbitrary Perl code</li>
</ul>
<p>While we may treat most elements optional depending on the use case, let’s take
an initial look at each.</p>
<p><a href="/2025/04/02/rexfile-foundations/#section-2">Continue reading …</a></p>
</section>
</article>
<article>
<header>
<h1><a href="/2025/03/21/minimum-viable-rex/">Minimum Viable Rex</a></h1>
<aside>
<time datetime="2025-03-21" title="published">
🗓 2025-03-21
</time>
<a href="/tag/rex/">#rex</a>
</aside>
</header>
<section>
<p>We consider enabling graceful bootstrapping as one of our main guiding
principles around <a href="https://metacpan.org/pod/Rex">Rex, the friendly automation
framework</a>.</p>
<p>While our <a href="https://www.rexify.org/docs/guides/start_using__r__ex.html">How to get started with
Rex</a> page provides
a good initial set of concepts, I wondered about the minimal set of features
that already proves useful in practice. I find this especially interesting when
using Rex from a cronjob or in a CI/CD pipeline.</p>
<p>Let’s see what I found through this exercise in minimalism.</p>
<p><a href="/2025/03/21/minimum-viable-rex/#section-2">Continue reading …</a></p>
</section>
</article>
<article>
<header>
<h1><a href="/2025/03/12/perl-basics-for-rex/">Perl basics for Rex</a></h1>
<aside>
<time datetime="2025-03-12" title="published">
🗓 2025-03-12
</time>
<a href="/tag/rex/">#rex</a>
<a href="/tag/perl/">#perl</a>
</aside>
</header>
<section>
<p><a href="https://www.rexify.org/">Rex, the friendly automation framework</a> does not
expect much previous programming or Perl experience, though knowing a few
foundational elements may go a long way.</p>
<p>While we provide a <a href="https://www.rexify.org/docs/guides/just_enough_perl_for_rex.html">Just enough Perl for
Rex</a> page on
our website, I often find myself sharing my own experience about getting
started with Perl.</p>
<p>I decided to write my own take about the basics from a Rex perspective, and
collect further resources I keep recommending or referring to.</p>
<p>Let’s see what I considered useful when I started out.</p>
<p><a href="/2025/03/12/perl-basics-for-rex/#section-2">Continue reading …</a></p>
</section>
</article>
<article>
<header>
<h1><a href="/2025/03/05/installing-rex/">Installing Rex</a></h1>
<aside>
<time datetime="2025-03-05" title="published">
🗓 2025-03-05
</time>
<time datetime="2025-03-31" title="last update">
🔄 2025-03-31
</time>
<a href="/tag/rex/">#rex</a>
</aside>
</header>
<section>
<p>We briefly describe the different ways to install <a href="https://metacpan.org/pod/Rex">Rex, the friendly automation
framework</a> on the <a href="https://www.rexify.org/get/">Get
Rex</a> page of our website, as well as in the
<a href="https://github.com/RexOps/Rex?tab=readme-ov-file#installation">Installation</a>
section of our README:</p>
<ol>
<li>Install from the Comprehensive Perl Archive Network (CPAN)</li>
<li>Use standard, native package managers</li>
<li>Build from source code</li>
</ol>
<p>Depending on the situation at hand, one of these often fit better than the
rest.</p>
<p>Let’s go through the available options in more detail to help choosing the best
match.</p>
<p><a href="/2025/03/05/installing-rex/#section-2">Continue reading …</a></p>
</section>
</article>
<article>
<header>
<h1><a href="/2025/02/26/virtues-of-rex/">Virtues of Rex</a></h1>
<aside>
<time datetime="2025-02-26" title="published">
🗓 2025-02-26
</time>
<a href="/tag/rex/">#rex</a>
</aside>
</header>
<section>
<p>We follow a set of guiding principles while developing <a href="https://metacpan.org/pod/Rex">Rex, the friendly
automation framework</a>:</p>
<ol>
<li>Use a programming language</li>
<li>Empower users through trust</li>
<li>Enable graceful bootstrapping</li>
</ol>
<p>While we summarize these concepts briefly on <a href="https://www.rexify.org/">our
website</a>, I consider it worthwhile to elaborate on the
underlying details.</p>
<p>Let’s take a closer look at why we find these choices important.</p>
<p><a href="/2025/02/26/virtues-of-rex/#section-2">Continue reading …</a></p>
</section>
</article>
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