UNIX & Networking for Testers — Interview Guide

Most QA engineers freeze when an interviewer asks "How would you debug a connection refused error on port 8080?" or "Walk me through what happens when you type a URL." This guide fixes that.

Written from 13 years of real testing experience — not YouTube summaries or blog posts.

📘 What's inside:

Part 1 — UNIX/Linux: file system, log analysis, process management, permissions, shell scripting & system health (65+ commands with testing context)

Part 2 — Networking: OSI model, TCP vs UDP, all HTTP status codes, DNS, SSL/TLS, curl, API headers & network monitoring for performance testing

Part 3 — Interview cheat sheet: Top 100 Q&As with crisp, structured answers + one-page quick reference card

✅Instantly downloadable Word document

✅ Interview-oriented — every concept tied to a real testing scenario

✅Beginner to intermediate — no prior Linux or networking background needed

Perfect for QA engineers targeting product companies, SDET roles, or interviews at FAANG-adjacent firms where Linux & networking questions are standard.