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Liangxu Linux

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.)

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Latest from Liangxu Linux

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Liangxu Linux

Nov 22, 2025 · Fundamentals

How to Build a Scalable Embedded Power‑Management Framework with Observer and Responsibility Chains

This article explains how AIoT‑era embedded devices evolve from simple C/assembly code to reusable, portable frameworks by applying design patterns such as the Observer pattern and a custom responsibility‑chain model for low‑power management, complete with code examples, memory‑pool handling, and test cases.

AIoTC ProgrammingDesign Patterns

0 likes · 16 min read

How to Build a Scalable Embedded Power‑Management Framework with Observer and Responsibility Chains

Liangxu Linux

Nov 22, 2025 · Fundamentals

Understanding Main Memory Architecture: Channels, Ranks, Banks, and Cache Line Filling

This article explains the organization of main memory, covering memory slots, channels, controllers, DIMM modules, ranks, banks, burst mode, and the step‑by‑step process by which a memory request is serviced and a cache line is filled.

DIMMDRAMbank-level parallelism

0 likes · 12 min read

Understanding Main Memory Architecture: Channels, Ranks, Banks, and Cache Line Filling

Liangxu Linux

Nov 20, 2025 · Operations

Avoid the ‘Delete‑Database‑and‑Run’ Nightmare: 10 Fatal Ops Pitfalls Revealed

A real 2018 incident where an ops engineer used rm ‑rf to wipe a production database sparked a deep dive into the high‑risk nature of operations, presenting Gartner statistics, psychological error factors, ten deadly pitfalls with concrete examples, and a comprehensive fault‑tolerance framework to prevent future catastrophes.

BackupIncident Managementautomation

0 likes · 23 min read

Avoid the ‘Delete‑Database‑and‑Run’ Nightmare: 10 Fatal Ops Pitfalls Revealed

Liangxu Linux

Nov 20, 2025 · Game Development

Four Open-Source Tools: Game Streaming, Screen Sharing, Terminal GUI, TikTok Downloader

This article introduces four notable open-source projects—Sunshine for game streaming, Bananas for cross‑platform screen sharing, term.everything for running GUI applications inside a terminal, and Douyin‑Downloader for batch TikTok video and audio extraction—highlighting their key features, popularity, and where to get them.

Screen SharingTikTok downloadergame streaming

0 likes · 4 min read

Four Open-Source Tools: Game Streaming, Screen Sharing, Terminal GUI, TikTok Downloader

Liangxu Linux

Nov 19, 2025 · Fundamentals

Dynamic Function Loading on STM32 Microcontrollers: A Practical Guide

This guide explains how to use a custom dynamic loader library on STM32 (Cortex‑M7) microcontrollers, covering project structure, installation steps, and runtime usage to load relocatable AXF files into RAM similarly to DLLs or shared objects.

C++Dynamic LoadingMicrocontroller

0 likes · 7 min read

Dynamic Function Loading on STM32 Microcontrollers: A Practical Guide

Liangxu Linux

Nov 19, 2025 · Fundamentals

Why C/C++ Static Code Analysis Is Essential: Standards, Tools & Best Practices

This article explains why static code analysis is crucial for C/C++ development, outlines major standards such as MISRA, CWE and CERT, reviews both commercial and open‑source analysis tools, and provides guidance on selecting the right solution based on project needs, budget and integration requirements.

C++CWEMISRA

0 likes · 12 min read

Why C/C++ Static Code Analysis Is Essential: Standards, Tools & Best Practices

Liangxu Linux

Nov 18, 2025 · Artificial Intelligence

Four Open‑Source AI Tools: Recipe Generator, Job Bot, Prompt Manager, Windows Automation

This article showcases four open‑source AI‑powered projects—a smart recipe generator, an automated job‑application tool, a local prompt‑management utility, and a Windows GUI automation framework—detailing their features, tech stacks, and GitHub repositories for developers to explore and adopt.

AIOpen-sourcePrompt management

0 likes · 5 min read

Four Open‑Source AI Tools: Recipe Generator, Job Bot, Prompt Manager, Windows Automation

Liangxu Linux

Nov 17, 2025 · Fundamentals

30 Proven C Optimization Tricks to Supercharge Embedded Code Performance

This article presents a comprehensive collection of low‑level C optimization techniques for embedded systems, covering algorithm selection, data type choices, arithmetic shortcuts, loop transformations, structure layout, function inlining, register usage, and many practical code examples to dramatically improve execution speed and reduce code size.

C ProgrammingCode Optimizationembedded systems

0 likes · 26 min read

30 Proven C Optimization Tricks to Supercharge Embedded Code Performance

Liangxu Linux

Nov 17, 2025 · Fundamentals

Where Do C Arrays Live in Memory? Stack, Global, and Heap Explained

This tutorial shows how C arrays are stored in the stack, global segment, and heap on a 64‑bit Linux system, using gcc compilation, gdb inspection, and concrete memory addresses to illustrate the exact layout of each region.

ArraysC++Global Segment

0 likes · 7 min read

Where Do C Arrays Live in Memory? Stack, Global, and Heap Explained

Liangxu Linux

Nov 16, 2025 · Fundamentals

Mastering pthread Condition Variables: Efficient Thread Wait‑Notify in Linux

This article explains the core principles, API usage, and best‑practice steps for pthread condition variables in embedded Linux, showing why they must be paired with mutexes, how to avoid lost wake‑ups, when to use signal versus broadcast, and includes a complete C example with practical tips.

c-programmingcondition variablepthread

0 likes · 9 min read

Mastering pthread Condition Variables: Efficient Thread Wait‑Notify in Linux