An operations lab passionate about server tinkering 🔬 Sharing automation scripts, high-availability architecture, alert optimization, and incident reviews. Using technology to reduce overtime and experience to avoid major pitfalls. Follow me for easier, more reliable operations!
A temporary test server on Tianyi Cloud was compromised by a malicious XMRig miner masquerading as fail2ban, causing CPU usage to skyrocket; the article details how the intrusion was discovered, the forensic steps taken, and a comprehensive remediation and hardening guide to prevent similar attacks.
This article explains how CDN has evolved from basic static‑content caching to a full‑featured edge computing platform that boosts user experience, accelerates dynamic APIs, implements fine‑grained cache strategies, and enforces multi‑layer security, providing concrete configuration examples and performance metrics for real‑world deployments.
This guide walks you through the four essential principles for production Docker images, demonstrates a complete multi‑stage Dockerfile for a Flask app, shows how to tag, build, verify, and deploy with docker‑compose, and warns against unsafe shortcuts like docker commit.
This guide walks Linux administrators through why xfs_undelete is the preferred XFS recovery tool, how to install it in under five minutes, and step‑by‑step commands—including basic, time‑filtered, and type‑filtered recovery—plus three real‑world scenarios, advanced tips, and common pitfalls.
This guide explains why extundelete can restore files deleted with rm on ext3/ext4 partitions, walks through installing the tool on various RHEL versions, shows how to safely stop writes, identify the affected partition, execute single‑file, directory or full‑partition recovery commands, verify results, and avoid common pitfalls, while also offering preventive measures to reduce future data loss.
This tutorial shows how awk, the built‑in Linux text‑processing tool, can dramatically speed up log analysis and routine data extraction by explaining core concepts, common patterns, real‑world examples such as Nginx, system monitoring and MySQL slow‑query logs, and providing a ready‑to‑run script.
This article explains why deleting huge log files can crash a server, compares the low‑IO echo and truncate commands for safely emptying logs, provides practical examples, parameter tips, additional methods, and best‑practice recommendations for production environments.
This guide explains why Docker image pulls can be painfully slow, presents a curated list of reliable mirror URLs verified on January 6 2026, provides a one‑click installation script for Docker with automatic mirror configuration, and includes detailed manual setup steps and verification commands for Linux environments.
This guide shows Linux administrators step‑by‑step how to locate reboot timestamps, retrieve full reboot histories, examine log files, analyze kernel and crash logs, check service and resource issues, and investigate human or scheduled actions, enabling fast root‑cause diagnosis of unplanned server restarts.
This guide walks you through a step‑by‑step process for quickly identifying the cause of high CPU usage in ClickHouse, from emergency triage and precise diagnosis using system tables to practical optimization techniques and a ready‑to‑run monitoring script.
