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.)
This article introduces MuditaOS, an open‑source embedded operating system for the minimalist Mudita Pure phone, detailing its FreeRTOS‑based service architecture, type‑safe message passing, lifecycle management, and the technical stack that enables a low‑power, E‑Ink‑optimized mobile experience.
When a server’s CPU suddenly hits 100%, this guide shows how to quickly identify the offending process, use tools like top, perf, strace, vmstat, and iostat for deep analysis, set up monitoring and alerts, plan capacity, and apply code and system optimizations to prevent future spikes.
The article explains the advantages of encapsulating device drivers and peripheral code into reusable libraries, outlines best practices for creating clean, platform‑independent libraries, and discusses the trade‑offs such as slight performance overhead and code‑size considerations for embedded systems.
This article presents 20 powerful Linux command combinations, grouped by file management, process monitoring, network diagnostics, log analysis, and system maintenance, each with clear examples, real‑world scenarios, common pitfalls, and practical tips to help administrators troubleshoot and automate daily operations efficiently.
USB cables often feel warm because they carry both data and high‑current power, converting resistance into heat, whereas Ethernet cables transmit only low‑current differential signals, resulting in minimal heat generation, with PoE‑enabled cables being a notable exception that still stays relatively cool.
This article measures the exact time cost of establishing a MySQL connection from Java, breaks down the TCP handshake, authentication, and protocol steps with Wireshark captures, and shows why connection pooling is essential for high‑traffic web applications.
This article explains the natural alignment requirements of C/C++ data types, how structs are padded and aligned based on member alignments, the hardware, cache and compiler reasons for alignment, and the concept of over‑aligned types with practical examples and usage guidelines.
The article lists common “anti‑patterns” in schematic design—such as chaotic layouts, meaningless naming, missing annotations, hidden connections, and version chaos—explains why they hinder maintenance, and then provides concrete best‑practice guidelines to create clear, modular, and well‑documented schematics.
This article measures the time required to establish and close a MySQL JDBC connection, showing that a single connection can consume over 200 ms, and explains why connection pooling is essential for high‑traffic web applications.
Kali Linux 2025.3 arrives with restored Nexmon wireless injection, a revamped VM image build process, removal of ARMEL support, Xfce desktop tweaks, mobile and automotive security upgrades, plus ten brand‑new penetration‑testing tools and detailed upgrade instructions.
