Linux File Permissions Explained
Learn how Linux file permissions work. Understand read, write, execute permissions, owner, group, others, octal notation like 755 and 644,...
Bite-sized visual guides that explain one software engineering concept at a time. Each explainer uses diagrams and practical examples to break down topics like DNS, Linux internals, deployment strategies, and command-line tools. Designed to be understood in a single sitting.
23 articles and counting
Learn how Linux file permissions work. Understand read, write, execute permissions, owner, group, others, octal notation like 755 and 644,...
Learn how Quartz cron expressions work and how they differ from standard cron. Understand the 6-field format, special characters like...
Learn what zero-day vulnerabilities are and why they're so dangerous. Understand how attackers exploit them, how they get discovered, and...
Learn how regular expressions (regex) work with simple examples. Understand pattern matching, special characters, and common use cases. A beginner-friendly...
Learn how cron jobs work and how to write cron expressions. A simple guide to scheduling automated tasks on Linux...
Learn how Snowflake IDs work and why they're used in distributed systems. Understand the structure, how they're generated, and why...
Learn what Model Context Protocol (MCP) is and how it helps AI assistants connect to external tools, databases, and services....
Learn what each directory in Linux is for and why it matters. Understand where programs, config files, and user data...
Learn the difference between concurrency and parallelism. Understand when to use each approach through simple examples, visual diagrams, and real-world...
Learn what SLI, SLO, and SLA mean and how they work together. Understand how to measure service quality, set targets,...
Learn how vector databases and RAG help AI remember your data. Understand what they are, how they work together, and...
Learn how passkeys replace passwords with a simple, secure way to log in. Understand how they work, why they're safer...
Learn about different DNS record types like A, AAAA, CNAME, MX, TXT, and NS records. Understand what each record does,...
Learn how Service Mesh handles traffic between microservices. Understand what problems it solves, when to use it, and see how...
Learn how Service Discovery helps microservices automatically find and talk to each other. Understand the difference between client-side and server-side...
Learn the difference between row-oriented and column-oriented database storage. Understand when to use each approach through simple examples and visual...
Learn how Change Data Capture (CDC) works to automatically keep your cache updated when database data changes. Understand CDC patterns,...
Master Kubernetes resource units - learn the difference between millicores, cores, Mi, Gi, and other CPU and memory notations. Understand...
Learn how WebSockets enable real-time, two-way communication between browsers and servers. Understand when to use WebSockets vs traditional HTTP through...
Learn the difference between blue-green and canary deployment strategies. Understand how to deploy your applications safely with zero downtime using...
Learn about the N+1 query problem through visual examples and practical solutions. Understand why your database queries are slow and...
Complete cURL command reference for developers. Learn HTTP requests, authentication, file uploads, API testing, and advanced cURL techniques with practical...
Master CQRS architecture through visual components and system diagrams. Learn when and how to implement Command Query Responsibility Segregation without...