https://www.rafaelvzago.com/en/tags/linux/Recent content in Linux on Rafael ZagoHugoen-US© Rafael ZagoFri, 24 Jul 2026 16:16:10 -0300https://www.rafaelvzago.com/en/posts/rtl-linux/Fri, 20 Dec 2024 00:00:00 -0300https://www.rafaelvzago.com/en/posts/rtl-linux/<p><a href="https://www.rafaelvzago.com/assets/img/headers/rtl.webp" class="img-lightbox" data-lightbox> <img src="https://www.rafaelvzago.com/assets/img/headers/rtl.webp" alt="" loading="lazy" decoding="async"> </a></p> <h2 id="introduction">Introduction</h2> <p>Real-Time Linux (RTL) is a Linux kernel extension that turns the operating system into a real-time environment. On top of the usual Linux features, it can handle work that needs high predictability and low latency—industrial automation, medical devices, even entertainment systems.</p> <p>At the end of 2024, the Linux kernel fully absorbed Real-Time Linux (RTL). That was a historic milestone. How did we get here?</p> <hr> <h2 id="the-rtl-journey">The RTL journey</h2> <p>The idea of adding real-time capabilities to Linux goes back to the late 1990s, when the first patches aimed to improve performance and cut kernel latency. Those patches grew into more solid projects such as PREEMPT-RT.</p>https://www.rafaelvzago.com/en/posts/carreira-com-software-livre/Thu, 07 Dec 2023 00:00:00 -0300https://www.rafaelvzago.com/en/posts/carreira-com-software-livre/<p><a href="https://www.rafaelvzago.com/assets/img/headers/carreira-com-softeware-livre-hero.webp" class="img-lightbox" data-lightbox> <img src="https://www.rafaelvzago.com/assets/img/headers/carreira-com-softeware-livre-hero.webp" alt="" loading="lazy" decoding="async"> </a></p> <h2 id="a-career-in-free-software--what-it-is-and-how-to-start">A career in free software — what it is and how to start</h2> <h2 id="introduction">Introduction</h2> <p>Free Software is a movement that promotes the freedom to use, study, modify, and distribute software. It rests on four essential freedoms:</p> <ol> <li>The freedom to run the program for any purpose (freedom 0).</li> <li>The freedom to study how the program works and adapt it to your needs (freedom 1). Access to the source code is a prerequisite for this freedom.</li> <li>The freedom to redistribute copies so you can help others (freedom 2).</li> <li>The freedom to improve the program and release your improvements so the whole community benefits (freedom 3). Access to the source code is a prerequisite for this freedom.</li> </ol> <h2 id="types-of-free-software-licenses">Types of free software licenses</h2> <p>There are many free software licenses. The most common ones are GPL, LGPL, MIT, Apache, BSD, and Mozilla. Each has its own traits and constraints, but all of them protect the four essential freedoms of the Free Software movement.</p>