Liangxu, a self‑taught IT professional now working as a Linux development engineer at a Fortune 500 multinational, shares extensive Linux knowledge—fundamentals, applications, tools, plus Git, databases, Raspberry Pi, etc. (Reply “Linux” to receive essential resources.)
The article argues that most programmer overtime isn’t caused by demanding bosses or shifting requirements, but stems from personal inefficiencies, an inability to refuse unreasonable tasks, and using the office as a refuge from an unfulfilling life outside work.
The article analyzes Linux kernel governance, showing that while Linus Torvalds serves as the final arbiter with unique judgment, a robust hierarchy of subsystem maintainers and decentralized processes ensures the kernel will continue to evolve even if he were to die, though some cultural and community risks remain.
UART remains the go‑to debugging interface in embedded projects because it needs only three wires, works asynchronously, enjoys universal driver support, and benefits from decades of Unix‑style console tradition, whereas SPI and I2C were never designed for simple human‑machine interaction.
The author argues that, despite a large absolute number of software workers in China, the proportion of programmers is modest, yet the market is flooded with low‑skill developers while truly capable engineers remain scarce, especially in high‑end fields like embedded systems, kernel or AI.
The article explores the Linux kernel’s most impressive designs—including the CFS scheduler, VFS abstraction, memory management tricks, extensible networking stack, driver framework, signal handling, and container foundations—illustrating how they solve real‑world constraints across diverse platforms.
Linux favors tar.gz because it follows the Unix philosophy of single‑purpose tools, preserves file permissions and metadata, is universally available without extra installation, offers flexible compression options, and benefits from a mature ecosystem, whereas ZIP loses metadata and 7Z requires extra tools and is slower.
After a month of daily use, the author finds the BenQ RD280U’s 3:2 aspect ratio, anti‑glare nanocoating, dedicated programming modes, and built‑in KVM switching dramatically reduce scrolling, eye strain, and device‑switching friction for heavy‑duty developers.
The article lists and categorises the most destructive Linux commands—like deleting glibc, running rm -rf /, misusing chmod or dd—and shares personal anecdotes that illustrate why careless use of these “cyber lightbulb” operations can instantly cripple a system.
Linux was built for high throughput and average performance, not for the deterministic worst‑case response times required by real‑time systems, and even with the PREEMPT_RT patch it can only achieve soft real‑time guarantees after additional tuning.
The article explains that university C programming courses omit Linux, Makefile, git, and gdb because of limited class hours, outdated curricula, and many instructors' lack of experience, arguing that self‑learning these tools often yields better results.
