Linux System Configuration

⚙️ Linux System Configuration Guide

Complete beginner-friendly guide to configuring Linux system settings, covering Arch Linux, CachyOS, and other distributions including systemd, services, user management, system information, time, locale, and hostname.

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📋 Table of Contents

1. Systemd Basics
2. Service Management
3. User Management
4. System Information
5. Time and Locale
6. Hostname Configuration
7. System Maintenance

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🎯 Systemd Basics

What is Systemd?

systemd is the init system and service manager.

Functions:

• Manages services
• Handles boot process
• Controls system resources
• Manages users and sessions

Systemd Components

Main components:

• systemd: Core system manager
• systemctl: Service control
• journalctl: Log viewing
• systemd-analyze: Boot analysis

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🔧 Service Management

Enable Service

Start service at boot:

# Enable service
sudo systemctl enable service-name

# Enable and start
sudo systemctl enable --now service-name

Example:

# Enable NetworkManager
sudo systemctl enable --now NetworkManager

Start/Stop Service

Control services:

# Start service
sudo systemctl start service-name

# Stop service
sudo systemctl stop service-name

# Restart service
sudo systemctl restart service-name

# Reload service (if supported)
sudo systemctl reload service-name

Service Status

Check service status:

# Check status
systemctl status service-name

# Check if running
systemctl is-active service-name

# Check if enabled
systemctl is-enabled service-name

See Systemctl Troubleshooting for detailed guide.

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👤 User Management

Create User

Add user:

# Create user
sudo useradd -m -G wheel username

# Set password
sudo passwd username

Sudo Configuration

Configure sudo:

# Edit sudoers
sudo visudo

# Ensure wheel group has sudo
%wheel ALL=(ALL) ALL

See User and Groups for detailed guide.

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ℹ️ System Information

System Info

Check system:

# System information
uname -a

# Kernel version
uname -r

# Hostname
hostname

# Uptime
uptime

Hardware Info

Check hardware:

# CPU info
lscpu

# Memory info
free -h

# Disk info
df -h

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⏰ Time and Locale

Time Configuration

Set timezone:

# List timezones
timedatectl list-timezones

# Set timezone
sudo timedatectl set-timezone America/New_York

See Time Synchronization for detailed guide.

Locale Configuration

Set locale:

# Generate locale
sudo locale-gen

# Set locale
sudo localectl set-locale LANG=en_US.UTF-8

See Locale and Language for detailed guide.

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🏷️ Hostname Configuration

Set Hostname

Change hostname:

# Set hostname
sudo hostnamectl set-hostname new-hostname

# Check hostname
hostnamectl

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🔧 System Maintenance

System Updates

Update system:

# Arch/CachyOS
sudo pacman -Syu

# Debian/Ubuntu
sudo apt update && sudo apt upgrade

# Fedora
sudo dnf update

System Cleanup

Clean packages:

# Clean cache
sudo pacman -Sc

# Remove orphans
sudo pacman -Rns $(pacman -Qdtq)

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📝 Summary

This guide covered system configuration for Arch Linux, CachyOS, and other distributions, including systemd, services, user management, and system maintenance.

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🔗 Next Steps

• Systemctl Troubleshooting - Service management
• User and Groups - User management
• Time Synchronization - Time setup
• Locale and Language - Locale setup
• ArchWiki systemd: https://wiki.archlinux.org/title/Systemd

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