Last week, I was debugging a production issue. The logs were filled with numbers like 1745678901. Our new intern looked confused: “What are these…
Posts for: #Tutorial
From Manual to Automated: Systemd Service Unit Configuration Best Practices
Last week, while deploying a Node.js application to production, I hit another systemd pitfall. The service kept exiting silently with no error logs…
Redis Cheatsheet Implementation: From Data Structures to Category Filtering
Our team recently added Redis to a new project. A few junior devs kept forgetting commands. The docs are too long, CLI help is too brief. So I buil…
From Variable Extraction to Smart Filling: Building a Prompt Template Manager
Recently, while using AI tools like ChatGPT and Claude, I noticed many prompts are reusable. For scenarios like code review, bug fixing, and docume…
Linux xargs Command Deep Dive: Bridging Pipes and Command Arguments
If you’ve used Linux for a while, you’ve probably encountered this frustration: piping the output of one command to another, only to get an error.
Linux wc Command: More Than Just Counting Lines
When writing code, you often need to quickly check file stats. Counting lines, measuring code size, checking file sizes—wc handles all of this.
Linux watch Command Deep Dive: From Real-time Monitoring to Change Detection
Time: 2026-05-11 16:57
Linux vmstat Command Deep Dive: From Kernel Statistics to Performance Bottleneck Diagnosis
Published: May 11, 2026 10:08
Linux uniq Command: From Adjacent Deduplication to Count Statistics
When processing log files or analyzing data, deduplication is a common task. The uniq command does exactly that—but with a catch: it only removes…
Linux tr Command Deep Dive: The Art of Character Translation
Exploring the most elegant character processing tool in Unix/Linux, from ASCII tables to stream processing internals