Linux hostnamectl Guide

Linux hostnamectl Guide

Complete beginner-friendly guide to hostnamectl on Linux, covering Arch Linux, CachyOS, and other distributions including hostname management, system identification, and systemd hostname control.

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Table of Contents

1. Understanding hostnamectl
2. hostnamectl Basics
3. Setting Hostname
4. Hostname Information
5. Troubleshooting

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Understanding hostnamectl

What is hostnamectl?

hostnamectl controls system hostname (systemd).

Uses:

• Set hostname: Change system hostname
• View hostname: Show hostname information
• System identification: Identify system
• Persistent changes: Changes persist across reboots

Why it matters:

• Modern tool: systemd-based tool
• Persistent: Changes are permanent
• System management: Manage system identity

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hostnamectl Basics

View Hostname

Basic usage:

# View hostname information
hostnamectl

# Shows hostname details

Current Hostname

Get hostname:

# Current hostname
hostnamectl status

# Shows hostname status

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Setting Hostname

Set Hostname

Change hostname:

# Set hostname
sudo hostnamectl set-hostname new-hostname

# Changes hostname permanently

Static Hostname

Set static:

# Set static hostname
sudo hostnamectl set-hostname --static new-hostname

# --static = static hostname

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Hostname Information

All Information

Complete info:

# All hostname information
hostnamectl

# Shows:
# - Static hostname
# - Pretty hostname
# - Icon name
# - Chassis
# - Machine ID

Pretty Hostname

Set pretty name:

# Set pretty hostname
sudo hostnamectl set-hostname --pretty "My Computer"

# --pretty = human-readable name

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Troubleshooting

hostnamectl Not Found

Check systemd:

# hostnamectl is part of systemd
# Usually pre-installed on systemd systems

# Check systemd
systemctl --version

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Summary

This guide covered hostnamectl usage, hostname management, and system identification for Arch Linux, CachyOS, and other distributions.

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Next Steps

• hostname Guide - Legacy hostname tool
• System Configuration - System setup
• hostnamectl Documentation: man hostnamectl

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