Focused on sharing practical Linux technology content, covering Linux fundamentals, applications, tools, as well as databases, operating systems, network security, and other technical knowledge.
This extensive article explains Linux memory management fundamentals, covering physical and virtual memory, allocation and release mechanisms, key kernel functions, performance tuning, leak detection, fragmentation handling, and real‑world code samples for developers and system engineers.
This article explains Linux performance metrics, how to interpret average load and CPU context switches, walks through practical case studies using tools like vmstat, pidstat and perf, and provides concrete optimization techniques for CPU and memory, including compiler flags, cgroup limits, NUMA tuning, and swap management.
This article explains the four main components of a Linux system—kernel, shell, file system, and applications—detailing kernel subsystems, memory and process management, the virtual file system, device drivers, network stack, mounting mechanisms, partition types, link types, and common administration commands.
The article showcases a collection of Linux commands that can cause severe system damage or data loss, illustrated with screenshots, warning users that executing these commands without full understanding can be extremely risky.
This article walks through a complete Linux network‑packet‑loss investigation, from identifying loss points across the protocol stack, using ethtool, netstat, tc, iptables and tcpdump, to removing a faulty netem rule and correcting an MTU setting, ultimately restoring Nginx HTTP responses.
This article introduces six free, open‑source network monitoring solutions—Zabbix, Prometheus, Cacti, Grafana, OpenNMS, and Nagios—explaining their core capabilities, typical use cases, and how they help operations teams maintain system reliability and quickly resolve issues.
This comprehensive guide examines Linux compression and decompression, comparing tar, gzip, and zip in depth, covering algorithm fundamentals, performance benchmarks, practical command examples, automation scripts, security considerations, and best‑practice recommendations to help engineers choose the optimal tool for backup, deployment, and data transfer tasks.
A seasoned operations veteran shares a step‑by‑step incident‑response workflow, the SEAL troubleshooting methodology, essential monitoring and debugging tools, real‑world case studies, automated scripts, and best‑practice guidelines to help engineers quickly diagnose and resolve production outages.
The article traces Intel's early processor line‑up—from the 4004 to the 80486—explains how the “86” suffix created the x86 family, shows that the name is unrelated to bit width, and follows the later AMD64 extension and Windows naming that linked 32‑bit software to the “Program Files (x86)” folder.
The article presents six free online diagramming platforms—Excalidraw, Zen Flowchart, Visual Paradigm Online, draw.io, 迅捷画图, and ProcessOn—detailing their key features, collaboration capabilities, template libraries, and direct URLs, helping operations professionals quickly choose the right visual‑communication tool.
