Focused on sharing Linux/Unix content, covering fundamentals, system development, network programming, automation/operations, cloud computing, and related professional knowledge.
Recent testing of an Intel‑powered Linux kernel patch revealed that a single code change dramatically improved memory allocation throughput by nearly 40‑fold, highlighting the massive impact of fine‑tuned memory management optimizations and the importance of addressing THP and PMD alignment issues.
This article reviews the eight most popular network monitoring solutions in China for 2025, detailing each tool's key features, suitable scenarios, and advantages, and concludes with practical recommendations for choosing the right solution based on monitoring needs and budget constraints.
This guide explains the same‑origin policy, demonstrates a cross‑origin request failure between two servers, and provides step‑by‑step Nginx configuration and JavaScript code to enable CORS headers so the request succeeds.
The article analyzes DeepSeek‑R1’s low‑cost inference architecture, Chinese language optimizations, novel prompt‑engineering techniques, and the practical challenges of deploying large domestic models, offering insights into vertical AI applications and the evolving open‑source ecosystem in China.
Kener is a modern self‑hosted status page tool that offers real‑time service monitoring, flexible event management, and easy deployment via manual setup or Docker, helping teams improve transparency, collaboration, and reliability of their services.
Learn step‑by‑step how to set up a fully functional, self‑hosted email system on CentOS 7.9 using Postfix, Dovecot, MariaDB, OpenDKIM and Nginx, covering software installation, configuration files, database schema, TLS/SSL, DNS records, and webmail integration with Roundcube.
This guide presents a comprehensive collection of shell and awk commands for analyzing Apache access logs, covering IP counting, page request statistics, traffic filtering, performance metrics, connection states, and bandwidth usage, enabling administrators to efficiently monitor and troubleshoot web server activity.
This article explains the role of DRAM in modern systems, distinguishes ROM and RAM, details the evolution of DDR memory from DDR1 through DDR5, and outlines key architectural features such as dual‑edge data transfer, prefetch, DIMM design, voltage reduction, bandwidth improvements, and essential terminology.
This guide explains what Linux environment variables are, lists common ones, and provides step‑by‑step commands to view, temporarily or permanently set, and delete them, plus practical examples for using variables in scripts, helping users efficiently manage their system configuration.
After a winter break surge, DeepSeek AI models have been swiftly adopted across Chinese universities, enabling local deployments for teaching, research, and campus services, while facing bans and security concerns abroad, highlighting both rapid domestic integration and international challenges.
