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# AWK Cheatsheet

## Overview of unique features

- Text processing language
- Uses pattern-action paradigm
- Built-in variables for manipulating text
- Supports regular expressions
- Can be used for data extraction and reporting

## Text processing

Print a specific field from a file

awk '{print $1}' file.txt

Search for a specific pattern in a file

awk '/pattern/ {print}' file.txt

Use built-in variables to manipulate text

awk '{print toupper($0)}' file.txt

awk '{print length($1)}' file.txt


## Regular expressions

Search for a regular expression in a file

awk '/[0-9]+/ {print}' file.txt

Use regular expression to match a specific pattern

awk '/^start/,/^end/ {print}' file.txt


## Reporting and data extraction

Calculate the sum of a column in a CSV file

awk -F, '{ sum += $3 } END { print sum }' file.csv

Extract data from a log file

awk '/error/ {print $0}' log.txt


## Resources

- [AWK documentation](https://www.gnu.org/software/gawk/manual/gawk.html)
- [AWK tutorial](https://www.tutorialspoint.com/awk/index.htm)
- [AWK forum](https://stackoverflow.com/questions/tagged/awk) for community support and troubleshooting.