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-    <title>Unix-like operating systems</title>
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-        <h2 class="center" id="title">UNIX-LIKE OPERATING SYSTEMS</h2>
-        <h6 class="center">21 SEPTEMBER 2025</h5>
-        <br>
-        <div class="twocol justify"><p>The Unix operating system project appears to have started in 1969 at Bell Labs.
-Something resembling contemporary Unix-like systems may have been developed in
-1973 when Dennis Ritchie and Ken Thompson rewrote the Unix kernel in C. Both of
-these important milestones predate me by some years. Nonetheless, operating
-systems that preserve the Unix philosophy have survived. Linux and OpenBSD are
-two such systems that I am personally familiar with.</p>
-
-<p>The following is a screenshot of my Arch Linux setup from 2020. It uses X
-display server and i3 for window management. The urxvt terminal emulator is
-made translucent using the Xcompmgr compositor.</p>
-
-<p><img src="linux.png" alt="Arch Linux" /></p>
-
-<p>The following is a screenshot of my OpenBSD laptop from 2024:</p>
-
-<p><img src="openbsd.png" alt="OpenBSD i3" /></p>
-
-<p>This degree of customization is impossible with commercial operating systems.
-The vendor sets firm boundaries about how the machine should be used.</p>
-
-<p>The conceptual elegance and architectural supremacy of Unix-like operating
-systems lie in how programs developed independently come together to accomplish
-complex tasks. For instance, to read an HTML email, I may use Mutt, an email
-client. Mutt would request credentials for my email account from Pass, a
-password manager, which in turn uses GPG to decrypt them before handing them
-over to Mutt. Mutt would then authenticate and fetch the email and delegate the
-rendering of the email to Lynx a web browser. The chaining of different tools
-resembles a sofware symphony.</p>
-
-<p>Each of these programs were developed by different programmers (at times
-decades apart), without an explicit intent for them to interoperate.
-The interoperability is a direct consequence of the Unix engineering
-philosophy. Engineers generations apart have kept that tradition alive (like
-a cathedral built by many generations).</p>
-
-<p>Files: <a href="dotfiles.tar.gz">dotfiles.tar.gz</a></p>
-</div>
-        <p class="post-author right">by Wickramage Don Sadeep Madurange</p>
-      </div>
-    </main>
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-          <a href="/archive/desktop-unix/" class="link-decor-none">Unix-like operating systems</a>
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