Linux realpath Guide

📍 Linux realpath Guide

Complete beginner-friendly guide to realpath on Linux, covering Arch Linux, CachyOS, and other distributions including resolving absolute paths, canonical paths, and path normalization.

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📋 Table of Contents

1. Understanding realpath
2. realpath Basics
3. Path Resolution
4. Practical Examples
5. Troubleshooting

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🎯 Understanding realpath

What is realpath?

realpath resolves absolute canonical paths.

Uses:

• Absolute paths: Get full path
• Resolve symlinks: Follow all links
• Normalize paths: Clean up paths
• Scripts: Use in automation

Why it matters:

• Path resolution: Get real paths
• Symlink resolution: Follow all links
• Scripting: Reliable paths in scripts

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📍 realpath Basics

Resolve Path

Basic usage:

# Resolve path
realpath file.txt

# Shows absolute canonical path

Relative Paths

Resolve relative:

# Resolve relative path
realpath ../file.txt

# Converts to absolute

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🔍 Path Resolution

Follow Symlinks

Resolve links:

# Follow all symlinks
realpath link.txt

# Resolves entire chain

Without Symlinks

Don't follow:

# Don't resolve symlinks
realpath -s file.txt

# -s = no symlinks

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💡 Practical Examples

In Scripts

Use in scripts:

#!/bin/bash
SCRIPT_DIR=$(realpath "$(dirname "$0")")
echo "Script directory: $SCRIPT_DIR"

Path Normalization

Clean paths:

# Normalize path
realpath ./.././file.txt

# Removes . and ..

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🔧 Troubleshooting

File Not Found

Check path:

# Verify file exists
ls -la file.txt

# Check permissions
stat file.txt

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📝 Summary

This guide covered realpath usage, path resolution, and canonical paths for Arch Linux, CachyOS, and other distributions.

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🔗 Next Steps

• readlink Guide - Read link targets
• pwd Guide - Current directory
• cd Guide - Change directory
• realpath Documentation: man realpath

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