Linux userdel Guide

Linux userdel Guide

Complete beginner-friendly guide to userdel on Linux, covering Arch Linux, CachyOS, and other distributions including deleting users, removing user accounts, and cleanup.

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Table of Contents

1. Understanding userdel
2. Deleting Users
3. Removing Home Directories
4. User Cleanup
5. Troubleshooting

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Understanding userdel

What is userdel?

userdel deletes user accounts.

Uses:

• Remove users: Delete user accounts
• Cleanup: Remove unused accounts
• System maintenance: Manage users
• Security: Remove compromised accounts

Warning:

• Data loss: Can delete user data
• Backup first: Always backup important data
• Be careful: Verify before deleting

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Deleting Users

Basic Deletion

Delete user:

# Delete user
sudo userdel username

# User removed from system
# Home directory may remain

Remove Home Directory

Complete removal:

# Delete user and home
sudo userdel -r username

# -r removes home directory

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Removing Home Directories

Force Removal

Force delete:

# Force remove home
sudo userdel -r -f username

# -f forces removal

Manual Cleanup

Manual removal:

# Delete user
sudo userdel username

# Remove home manually
sudo rm -rf /home/username

# Remove mail
sudo rm -rf /var/mail/username

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User Cleanup

Check Before Delete

Verify user:

# Check user exists
id username

# Check home directory
ls -la /home/username

# Check processes
ps aux | grep username

Kill User Processes

Stop processes:

# Kill user processes
sudo pkill -u username

# Or
sudo killall -u username

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Troubleshooting

Cannot Delete User

Fix issues:

# Check if user logged in
who | grep username

# Kill processes
sudo pkill -u username

# Force delete
sudo userdel -r -f username

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Summary

This guide covered userdel usage, user deletion, and cleanup for Arch Linux, CachyOS, and other distributions.

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Next Steps

• useradd Guide - User creation
• usermod Guide - User modification
• User and Groups - User management
• userdel Documentation: man userdel

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