How to Install Apache Server on Ubuntu

Introduction

Apache HTTP Server is one of the most popular and widely used web servers. This guide walks you through the process of installing Apache on an Ubuntu system.

Prerequisites

• An Ubuntu-based system (18.04 or newer is recommended).
• User access with sudo privileges.
• A stable internet connection.

Step 1: Update Package Index

Before installing any software, it's a good practice to ensure your package index is up-to-date. Run the following command:

sudo apt update

This command updates the list of available packages and their versions.

Step 2: Install Apache Server

To install the Apache HTTP server, execute the following command:

sudo apt install apache2 -y

The -y flag automatically confirms the installation prompt, saving you an additional step.

Step 3: Verify Apache Installation

Once installed, you can verify that Apache is up and running by checking its status:

sudo systemctl status apache2

You should see output indicating that the service is active (running).

Step 4: Adjust Firewall Settings

If your system has a firewall enabled, you need to allow traffic on port 80 (HTTP) and port 443 (HTTPS). Run the following commands:

sudo ufw allow 'Apache'
sudo ufw enable

To confirm the changes:

sudo ufw status

Ensure that Apache is listed as allowed.

Step 5: Test Apache

Open your browser and navigate to:

http://your-server-ip

You should see the default Apache welcome page, confirming the installation was successful. Replace your-server-ip with your server's actual IP address. You can find it using:

hostname -I

Conclusion

You've successfully installed and configured the Apache HTTP Server on your Ubuntu system. You can now start hosting your websites or applications. If you encounter issues, consult the official Apache documentation.

Sample Commands Recap

• Update package index:

  sudo apt update
  

• Install Apache:

  sudo apt install apache2 -y
  

• Allow Apache through the firewall:

  sudo ufw allow 'Apache'
  - Enable the firewall:
  
  ```bash
  sudo ufw enable
  

• Check Apache status:

  sudo systemctl status apache2