Linux Apache Guide

Complete beginner-friendly guide to Apache HTTP Server on Linux, covering Arch Linux, CachyOS, and other distributions including installation, configuration, and virtual hosts.

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Table of Contents

1. Apache Installation
2. Apache Configuration
3. Virtual Hosts
4. Modules
5. Troubleshooting

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Apache Installation

Install Apache

Arch/CachyOS:

# Install Apache
sudo pacman -S apache

# Enable service
sudo systemctl enable --now httpd

# Check status
systemctl status httpd

Debian/Ubuntu:

sudo apt install apache2
sudo systemctl enable apache2

Fedora:

sudo dnf install httpd
sudo systemctl enable httpd

Verify Installation

Test Apache:

# Check if running
curl http://localhost

# Or open browser
# http://localhost

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Apache Configuration

Main Configuration

Edit config:

# Edit main config
sudo vim /etc/httpd/conf/httpd.conf

# Or Debian/Ubuntu
sudo vim /etc/apache2/apache2.conf

Basic Settings

Common settings:

ServerName localhost
DocumentRoot /srv/http
Listen 80

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Virtual Hosts

Create Virtual Host

Apache (Arch):

# Edit virtual hosts
sudo vim /etc/httpd/conf/extra/httpd-vhosts.conf

Add:

<VirtualHost *:80>
    ServerName example.com
    DocumentRoot /srv/http/example
</VirtualHost>

Debian/Ubuntu:

# Create site
sudo vim /etc/apache2/sites-available/example.com.conf

# Enable site
sudo a2ensite example.com
sudo systemctl reload apache2

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Modules

Enable Modules

Arch/CachyOS:

# Edit config
sudo vim /etc/httpd/conf/httpd.conf

# Uncomment modules
LoadModule rewrite_module modules/mod_rewrite.so

Debian/Ubuntu:

# Enable module
sudo a2enmod rewrite
sudo systemctl reload apache2

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Troubleshooting

Apache Not Starting

Check logs:

# Check service
systemctl status httpd

# Check logs
journalctl -u httpd

# Or error log
sudo tail -f /var/log/httpd/error_log

Test Configuration

Validate config:

# Test configuration
sudo apachectl configtest

# Or
sudo httpd -t

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Summary

This guide covered Apache installation, configuration, and virtual hosts for Arch Linux, CachyOS, and other distributions.

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Next Steps

• Web Servers - Web server setup
• Networking - Network setup
• Apache: https://httpd.apache.org/

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