Focused on sharing Linux/Unix content, covering fundamentals, system development, network programming, automation/operations, cloud computing, and related professional knowledge.
A step‑by‑step guide shows how to use Linux commands like top, vmstat, free, iostat, and ss to quickly identify CPU overload, memory pressure, disk I/O bottlenecks, and network port problems, providing a practical cheat sheet for effective server troubleshooting.
This article reveals ten often‑unspoken rules—from showcasing technical depth and negotiating salary to crafting a focused résumé and systematic interview preparation—that can dramatically improve a DevOps engineer's chances of securing a better offer.
A production engineer receives a P2 CPU‑load alert, diagnoses the offending Python backup script by inspecting top and ps outputs, discovers it was compressing a 350 GB log directory, and resolves the issue with a forced kill and post‑mortem best‑practice advice.
A senior cloud operations engineer receives a P1 alert for a web‑gateway server nearing 100% /var disk usage, then systematically logs in, diagnoses the log‑file bloat with df, du, and tail, truncates the offending debug log, and implements post‑mortem fixes to prevent recurrence.
This article reveals why many ops engineers are stuck below 20K, outlines four high‑impact practices—including coding automation, mastering cloud‑native, aligning with business performance, and shifting from firefighting to prevention—and presents concrete career paths and daily actions to boost expertise and salary.
This article examines the challenges of building scalable, low‑latency, and cost‑effective network architectures—such as Clos/Fat‑Tree, Spine‑Leaf, Dragonfly, and Torus—for massive GPU clusters used in training trillion‑parameter AI models, comparing multi‑rail and single‑rail designs and highlighting real‑world implementations from Tencent and Alibaba.
After NVIDIA’s abrupt exit from the Chinese market, domestic AI chip makers such as Huawei Ascend, Cambricon, Moores Thread, and Muxi are rapidly filling the gap, with increasing market share, diverse architectures, and ambitious production goals that could soon surpass foreign competitors.
This guide walks you through every line of the Linux top command output, explaining system summaries, CPU and memory metrics, process details, and advanced shortcuts, so you can quickly diagnose performance bottlenecks and become proficient at real‑time system troubleshooting.
This guide provides a comprehensive, system-wide Linux performance troubleshooting cheat sheet covering CPU, memory, disk I/O, network, and process metrics, offering over 20 essential commands with usage scenarios, key parameters, output interpretation, alert thresholds, and practical case studies to quickly pinpoint and resolve production issues.
This comprehensive guide covers 32 high‑frequency SSH interview questions, from basic concepts and key management to advanced tunneling, performance tuning, and enterprise‑level security practices, providing detailed answers, best‑practice configurations, and code examples for Linux cloud environments.
