_posts — Topic Index

Below is an index of articles grouped by topic. Click a heading to jump to the section.

DevOps

• Error Keywords for Log Analysis: A Practical Triage Playbook
  • A practical keyword strategy for quickly triaging application and infrastructure logs, with grep patterns, false-positive filtering, and severity mapping.
• How to Find and Fix Bugs in Your Code — A Systematic Debugging Guide
  • Comprehensive guide to systematic debugging approaches, tools, and best practices for finding and fixing bugs efficiently
• Linux Multi IP Setup: Assigning Multiple Addresses Safely
  • A practical guide to assigning multiple IP addresses on Linux using modern and legacy methods, with safe rollback and SSH lockout prevention tips.
• Show MySQL Performance — Variables, Status & Monitoring
  • Comprehensive guide to MySQL performance monitoring using SHOW VARIABLES and SHOW STATUS commands with practical examples and best practices.
• Thinking About Docker 2: Static Linking, Layers, and Image Efficiency
  • Understand static vs dynamic linking in container images, how to inspect dependencies with ldd, and how image layers affect storage efficiency.
• Thinking About Docker: Why It Changed Deployment Workflows
  • A practical analysis of how Docker improved software delivery, what problems it actually solves, and where containers add operational complexity.
• Thinking About Monitoring Systems in 2026
  • A practical guide to modern monitoring system design: metrics, logs, traces, alerting, SLOs, and incident response workflows.
• Tomcat Deployment Architecture Complete Guide 2026
  • In-depth look at Tomcat deployment architectures, from single node to distributed clusters, including load balancing, caching, and Session management best practices.
• Virtual Machines vs Containers: Practical Differences in 2026
  • Understand VM vs container trade-offs across isolation, performance, security, operations, and modern hybrid patterns like microVMs and sandboxed runtimes.

Food

• What Food Is Truly Healthy?
  • Exploring the principles of healthy eating: natural growing conditions, sufficient growing time, freshness, and how to distinguish processed foods from natural ingredients.

Linux

• CURL Command Usage — Complete Guide to Making HTTP Requests
  • Comprehensive guide to CURL with core concepts, practical examples, debugging techniques, and best practices for making HTTP requests from the command line.
• How to Quit Telnet Correctly (and Troubleshoot Sessions)
  • A practical guide to exiting telnet sessions correctly, using escape mode, and using telnet for TCP troubleshooting in modern Linux environments.
• Iptables
  • Iptables router
• Iptables More Strict: Building a Least-Privilege Linux Firewall
  • Design a strict but practical iptables policy with default deny rules, explicit service allowlists, logging, and safe rollout procedures.
• Iptables Rules Setup CentOS6
  • Explanation of CentOS default firewall rules
• Linux LVM (Logical Volume Manager): Complete Guide
  • Master Linux LVM to flexibly manage disk space. Learn about PV, VG, LV concepts, creation, resizing, snapshots, and production best practices.
• Shell String Operations Complete Guide
  • Deep dive into Shell string operations, including getting length, substring extraction, replacement, pattern matching, and other common techniques.
• The df Command: Complete Guide to Checking Disk Space in Linux
  • Master the df command in Linux to monitor disk usage, identify storage issues, and manage file systems effectively. Includes practical examples and advanced usage.
• The dig Command: Complete Guide to DNS Queries in Linux
  • Master the dig command for DNS lookups. Learn query types, tracing, troubleshooting, and advanced DNS diagnostic techniques.
• VirtualBox Host-Only Network Setup (Host <-> VM)
  • Complete setup guide for VirtualBox Host-Only networking, including IP planning, static addressing, internet access with dual adapters, and troubleshooting.

Math

• Math Test Notes

Nginx

• How keepalive_timeout directive works in Nginx?
  • Observing the keepalive_timeout parameter in Nginx through packet capture experiments

Operating Systems

• OS I/O Performance: Memory vs Disk Operations Deep Dive
  • A comprehensive guide to understanding OS I/O performance, memory hierarchy, blocking vs non-blocking I/O, and strategies for high-performance applications.

Programming

• Ajax Event Handling Process
  • Comprehensive guide to AJAX event handling — from classic XMLHttpRequest to modern Fetch API, async/await patterns, CORS handling, request cancellation, and file uploads.
• Building Your Own Linux Kernel Module: From Compilation to Troubleshooting
  • Complete guide to Linux kernel module minimal examples, compilation workflow, loading and unloading, log troubleshooting, and production practices.
• Complete Guide to Sending HTTP Requests from Browser Console
  • Learn how to send GET, POST, PUT, DELETE and other HTTP requests from the browser console using native JavaScript, including the Fetch API and XMLHttpRequest.
• Computer System Hierarchy: From Hardware to Software
  • Understanding computer system hierarchy from physical layer to application software - a comprehensive guide to how computers work at every level.
• data-behavior Pattern: Best Practice for JavaScript Developers
  • Understand the data-behavior pattern, learn how to use HTML data attributes to add behavior for JavaScript and avoid CSS class confusion.
• Git Commit Message Style Guide
  • A practical Git commit message guide for teams: structure, conventions, examples, anti-patterns, and release-friendly commit hygiene.
• How to Ask a Better Question
  • A comprehensive guide to asking effective technical questions — covering the XY Problem, effective searching, code formatting, platform-specific etiquette for Stack Overflow, GitHub, and Discord.
• HTML5 Semantic Elements: A Complete Guide to Choosing the Right Structure
  • Master HTML5 semantic elements including section, nav, article, and aside. Learn when to use each element for better SEO, accessibility, and maintainable code.
• Java Memory Leaks Explained: Causes, Detection, and Prevention
  • A comprehensive guide to understanding, detecting, and fixing memory leaks in Java, with practical examples of common pitfalls and profiling tools.
• JavaScript Variables Deep Dive: var, let, const, and Hoisting Explained
  • A complete masterclass on JavaScript variable declarations. Understand scope, hoisting, the Temporal Dead Zone (TDZ), and why ‘var’ is functionally deprecated in modern 2026 codebases.
• Linux Kernel Upgrade
  • Linux kernel module upgrade
• Linux Shell Command Line Shortcuts Complete Guide
  • Learn Linux Shell command line shortcuts, including how to safely cancel commands, edit commands, quick navigation, and other productivity tips.
• Python Development Tools Guide 2026
  • Complete guide to common Python development tools, including package management, virtual environments, IDEs, testing tools, and more.
• Testing in Ruby: A Practical Guide from Unit Tests to CI
  • A practical Ruby testing guide covering test layers, RSpec patterns, mocking strategies, system tests, and CI workflows.
• Thinking in Programming Languages
  • A practical framework for understanding programming languages by execution model, type system, memory semantics, concurrency, and ecosystem fit.
• Thoughts on Implementing Shipping Address Selection in E-Commerce Websites
  • Thoughts on implementing shipping address selection in e-commerce websites
• Use Database Default Values to Reduce Null-Related Runtime Errors
  • How to use database defaults and NOT NULL constraints safely to prevent null-related application errors without hiding data quality problems.

Security

• Avoid Locking Yourself Out with iptables: Safe Firewall Rollout Guide
  • A practical guide to updating iptables safely without blocking your own SSH access, including rollback strategies, allowlists, and production checklists.
• Understanding Same-Origin Policy (SOP) and CORS in Web Security
  • A complete guide to the Same-Origin Policy, Cross-Origin Resource Sharing (CORS), Preflight requests, and how to securely bypass origin restrictions in a modern 2026 web stack.
• X-Frame-Options Explained: Preventing Clickjacking in Modern Web Apps
  • Learn how X-Frame-Options works, when to use DENY vs SAMEORIGIN, and how to migrate to CSP frame-ancestors for modern clickjacking protection.

If you find missing articles or inaccurate groupings, run ./scripts/update_index.py with appropriate flags.