Liangxu Linux

Mar 4, 2025 · Fundamentals

Master awk: From Basics to Advanced Text Processing on Linux

This guide explains what awk is, its pattern‑action syntax, built‑in variables such as NR, NF, FS, RS, OFS and ORS, and provides step‑by‑step examples—including generating test data, column manipulation, custom delimiters, and solving a word‑frequency interview question—so readers can efficiently extract and transform text on the command line.