Linux expand Guide

Complete beginner-friendly guide to expand on Linux, covering Arch Linux, CachyOS, and other distributions including converting tabs to spaces, text formatting, and whitespace conversion.

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Table of Contents

1. expand Basics
2. Tab to Space Conversion
3. Tab Stops
4. File Processing
5. Troubleshooting

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expand Basics

Convert Tabs

Basic usage:

# Convert tabs to spaces
expand file.txt

# Converts tabs to spaces

Default Tab Width

Default behavior:

# Default: 8 spaces per tab
expand file.txt

# Converts tabs to 8 spaces

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Tab to Space Conversion

Custom Width

Set tab width:

# Custom tab width
expand -t 4 file.txt

# -t = tabs (4 spaces per tab)

Multiple Tab Stops

Multiple stops:

# Multiple tab stops
expand -t 4,8,12 file.txt

# Tab stops at columns 4, 8, 12

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Tab Stops

Single Width

Uniform width:

# All tabs = 4 spaces
expand -t 4 file.txt

# Every tab becomes 4 spaces

Variable Stops

Variable stops:

# Variable tab stops
expand -t 4,8,12 file.txt

# Different stops at different columns

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File Processing

In Place

Modify file:

# In place (GNU extension)
expand -t 4 file.txt > file.txt.tmp
mv file.txt.tmp file.txt

# Or use sponge (from moreutils)
expand -t 4 file.txt | sponge file.txt

Output to File

Save to file:

# Output to file
expand -t 4 file.txt > output.txt

# Saves converted file

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Troubleshooting

expand Not Found

Check installation:

# expand is part of coreutils
# Usually pre-installed

# Check expand
which expand

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Summary

This guide covered expand usage, tab-to-space conversion, and text formatting for Arch Linux, CachyOS, and other distributions.

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Next Steps

• unexpand Guide - Convert spaces to tabs
• sed Guide - Text processing
• Text Processing - Text manipulation
• expand Documentation: man expand

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This guide covers Arch Linux, CachyOS, and other Linux distributions. For distribution-specific details, refer to your distribution's documentation.