Awk Cheatsheet

Awk text processing, field manipulation, and pattern-action programming

Shell Utilities6 commandsintermediate

Overview

Awk is a programming language for pattern scanning and text processing.

Why It Matters

Awk is a powerful text processing language for extracting and transforming data.

Essential Commands

awk '{print $1}' file.txt

Print first column from each line

awk -F, '{print $1,$3}' data.csv

Use custom delimiter for fields

awk '$3 > 100 {print $0}' sales.txt

Filter rows using field conditions

awk '{sum += $2} END {print sum}' nums.txt

Aggregate values and print total

awk 'NR==1{print;next}{print $0}' file.txt

Handle header and data rows separately

awk 'BEGIN{OFS=

} {print $1,$2}' file.txt

Quick Start

Master process fields and records efficiently first

Key Concepts

Process fields and records efficiently

Use built-in variables ($0, NR, NF)

Create patterns and actions for data extraction

Pro Tips

  • Combine multiple commands for powerful workflows
  • Use aliases to speed up your command entry
  • Create scripts to automate repetitive tasks

Common Pitfalls to Avoid

  • • Forgetting to check the documentation for edge cases
  • • Running commands without understanding their full impact
  • • Not testing changes in a safe environment first

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