awk — Basics

Fundamental awk — field splitting, built-in variables, and line selection.

Page Description

Field Extraction

-F delimiters, $1..$NF, OFS, column selection

Built-in Variables

NR, NF, FS, OFS, RS, ORS, FNR, FILENAME

Line Selection

Line ranges, head/tail emulation, sampling, skip comments

Reading Files

cat/head/tail replacements, AsciiDoc browsing, relative line numbers, piping to cat