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mhoush: Introduction to Programming for HVAC Part-2
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<meta content="In this article, learn about installing a package manager. If you missed it, check out the
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first article in the series where we learned about using your terminal.
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This article builds upon that foundation.
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What is a Package Manager
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A package manager..." name="description"/>
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<meta content="In this article, learn about installing a package manager. If you missed it, check out the
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first article in the series where we learned about using your terminal.
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This article builds upon that foundation.
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What is a Package Manager
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A package manager..." name="og:description"/>
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<article class="prose">
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<h1>
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Introduction to Programming for HVAC Part-2
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</h1>
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<div class="-mt-6">
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<div class="text-gray gray-links text-sm">
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<span class="border-r border-gray pr-2 mr-2">September 22, 2023</span>537 words, posted in <a href="/articles/tag/hvac/">HVAC</a>, <a href="/articles/tag/programming/">programming</a> and <a href="/articles/tag/software/">software</a>
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</div>
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</div>
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<img alt="banner" src="http://localhost:3000/articles/images/2023-09-22-introduction-to-programming-for-hvac-2.png"/>
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<p>In this article, learn about installing a package manager. If you missed it, check out the
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<a href="https://mhoush.com/posts/introduction-to-programming-for-hvac-1/">first</a> article in the series where we learned about using your terminal.
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This article builds upon that foundation.</p>
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<h2>What is a Package Manager</h2>
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<p>A package manager is a piece of software that helps to install software and manage updates for your system. For me, the first thing that I
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do with a new machine is install <code>Homebrew</code>. <a href="https://brew.sh">Homebrew</a> is my preferred package manager for <code>macOS</code>.</p>
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<h2>Why</h2>
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<p>A package manager is nice because often software relies / requires other dependencies in order to work properly. By using a package manager
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it will make sure that the correct dependencies are installed for the software that you need to run. It allows you to be able to update and
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manage software through a centralized interface.</p>
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<h2>Installation</h2>
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<p>Installation is simple. Open up your terminal and enter the following command (easiest to just copy / paste from the homepage linked above).</p>
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<pre><code class="language-bash">/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
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</code></pre>
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<p>This will prompt you for your password in order to create some directories and install the required software for <code>brew</code> to work. The
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installation may take some time, while it downloads the command line tools for <code>Xcode</code>.</p>
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<p>When completed, follow the <code>Next Steps</code> and copy / paste the command listed, that should look like below.</p>
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<pre><code class="language-bash">(echo; echo 'eval "$(/opt/homebrew/bin/brew shellenv)"') >> /Users/<you>/.zprofile
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eval "$(/opt/homebrew/bin/brew shellenv)"
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</code></pre>
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<p><img src="/articles/images/2023-09-22-brew-output.png" alt="brew-output" /></p>
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<p>The first line of this command sets up some things in your shell profile (which we have not discussed yet) that will make <code>Homebrew</code>
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available to you anytime you start a new session in your terminal. The second line of the command makes it available in your current
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terminal session.</p>
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<p>Next run the following command and make sure that everything is setup correctly.</p>
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<pre><code class="language-bash">brew doctor
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</code></pre>
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<p>Which should output the following:</p>
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<pre><code>Your system is ready to brew.
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</code></pre>
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<h3>Terminology</h3>
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<p>Homebrew calls command line applications <code>formula</code> and normal graphical applications <code>casks</code>. It has the ability to install both styles of
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applications.</p>
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<h2>Search Command</h2>
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<p>The following command is used to search for software packages:</p>
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<pre><code class="language-bash">brew search chrome
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</code></pre>
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<h2>Open a Homepage</h2>
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<p>The following command can be used to view the homepage of a formula or cask in your browser:</p>
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<pre><code class="language-bash">brew home google-chrome
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</code></pre>
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<h2>Update Homebrew</h2>
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<p>The following command is used to update homebrew:</p>
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<pre><code class="language-bash">brew update
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</code></pre>
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<h2>Update packages installed on your system</h2>
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<p>The following command is used to update software that is installed / managed by homebrew.</p>
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<pre><code class="language-bash">brew upgrade
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</code></pre>
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<p>You can combine the update and upgrade commands, which will update homebrew and upgrade all the software it manages on you machine with the
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following command.</p>
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<pre><code class="language-bash">brew update && brew upgrade
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</code></pre>
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<h2>Conclusion</h2>
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<p>That is it for this article. I will say that for me, when I find a piece of software that I want to use, I generally try to search for it in
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<code>brew</code> first, before installing it via other means.</p>
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<p>I hope you’ve found this article helpful. In the next article we will start to use the skills that we’ve learned in these first two articles
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and write our first program / script.</p>
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</article>
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<div class="border-t border-light mt-8 pt-8">
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<h2 class="text-4xl font-extrabold mb-8">
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Written by
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</h2>
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<img class="w-[120px] h-[120px] rounded-full" src="/static/images/avatar.png"/>
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</div>
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<div class="prose">
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<h3 class="!m-0">
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Michael Housh
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</h3>
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<p class="text-gray">
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HVAC business owner with over 27 years of experience. Writes articles about HVAC,
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Programming, Home-Performance, and Building Science
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</p>
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</div>
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</div>
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</div>
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<div class="mt-16">
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<h2 class="text-4xl font-extrabold mb-8">
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More articles
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</h2>
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<section>
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<h2 class="text-2xl font-bold mb-2">
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<a class="[&:hover]:border-b border-orange" href="/articles/2025/vapor-htmx-todo-app/">Vapor + HTMX</a>
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</h2>
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<div class="text-gray gray-links text-sm mb-4">
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<span class="border-r border-gray pr-2 mr-2">January 05, 2025</span><a href="/articles/tag/general/">general</a>, <a href="/articles/tag/programming/">programming</a> and <a href="/articles/tag/software/">software</a>
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</div>
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<p>
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<a href="/articles/2025/vapor-htmx-todo-app/"><div>
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Build an example application using Vapor and HTMX.
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</div></a>
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</p>
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</section>
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<section>
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<h2 class="text-2xl font-bold mb-2">
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<a class="[&:hover]:border-b border-orange" href="/articles/2024/free-as-in-freedom/">Free As In Freedom</a>
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</h2>
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<div class="text-gray gray-links text-sm mb-4">
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<span class="border-r border-gray pr-2 mr-2">April 09, 2024</span><a href="/articles/tag/general/">general</a>, <a href="/articles/tag/open-source/">open-source</a> and <a href="/articles/tag/software/">software</a>
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</div>
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<p>
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<a href="/articles/2024/free-as-in-freedom/"><div>
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Salute to open-source software engineers
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</div></a>
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</p>
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</section>
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</div>
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<p class="prose mt-8">
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<a href="/articles/">› See all articles</a>
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Copyright © Michael Housh 2023-2025.
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