How to Install and Configure Apache on openSUSE or SLES

The Apache HTTP Server, commonly known as Apache, is one of the most widely used and trusted web servers in the world. It is open-source, highly stable, and flexible enough to host everything from simple static websites to complex enterprise web applications.

This guide provides a clear, step-by-step process to install and configure Apache on openSUSE and SUSE Linux Enterprise Server (SLES) using the zypper package manager.

Prerequisites

Before you begin, ensure that:

• You have a running instance of openSUSE or SLES.
• You have a user account with sudo privileges.
• Your system has internet connectivity for package installation.

Steps to install and configure Apache

Step 1: Updating our System

Before installing any software, ensure your system is up to date:

sudo zypper refresh

sudo zypper update

This ensures all repositories and installed packages are up to date.

Step 2: Install Apache

for installing apache we will use zypper package manager

sudo zypper install apache2

Once the installation completes, Apache is installed but not yet running.

Step 3: Start and Enable Apache

After the installation is complete, start the Apache service and enable it to start on boot:

sudo systemctl start apache2

sudo systemctl enable apache2

To verify that Apache is running, you can check the status of the service:

sudo systemctl status apache2

You should see a status message indicating that Apache is active and running.

Step 4: Configure the Firewall

If you have a firewall running on your system, you need to allow HTTP and HTTPS traffic. Use the following commands to open the necessary ports:

sudo firewall-cmd --permanent --add-service=http

sudo firewall-cmd --permanent --add-service=https

sudo firewall-cmd --reload

This allows web traffic on ports 80 (HTTP) and 443 (HTTPS).

Step 5: Testing Apache Installation

To ensure that Apache has been installed correctly, open a web browser and navigate to your server's IP address:

http://your_server_ip

You should see the default Apache welcome page, which confirms that Apache is working correctly.

Step 6: Additional Configuration

Edit Apache’s main configuration file at /etc/apache2/httpd.conf to make changes. For example:

sudo nano /etc/apache2/httpd.conf

Here are a few common configurations you might want to adjust:

6.1. Changing the Document Root

The Document Root is the directory where your website files are stored. By default, this is set to /srv/www/htdocs. To change it, locate the following line:

DocumentRoot "/srv/www/htdocs"

And update it to your desired directory, for example:

DocumentRoot "/var/www/html"

Ensure the directory exists and has the correct permissions:

sudo mkdir -p /var/www/html

sudo chown -R wwwrun:www /var/www/html

Restart Apache:

sudo systemctl restart apache2

6.2. Configuring Virtual Hosts

Virtual Hosts allow you to run multiple websites on a single server. To set up a Virtual Host, create a new configuration file in the /etc/apache2/vhosts.d/ directory. For example:

sudo nano /etc/apache2/vhosts.d/example.conf

Add the following configuration to the file:

<VirtualHost *:80>

ServerAdmin admin@example.com

ServerName example.com

DocumentRoot "/var/www/example"

ErrorLog "/var/log/apache2/example.com-error_log"

CustomLog "/var/log/apache2/example.com-access_log" common

</VirtualHost>

Create the document root directory and set the correct permissions:

sudo mkdir -p /var/www/example

sudo chown -R wwwrun:www /var/www/example

Restart Apache to apply the changes:

sudo systemctl restart apache2

Step 7: Enable and Test the Configuration

Before restarting Apache after configuration changes, test the syntax:

sudo apachectl configtest

If you see: Syntax OK

• Restart Apache:

sudo systemctl restart apache2

Optional: Enable SSL (HTTPS)

To enable SSL support:

sudo a2enmod ssl

sudo systemctl restart apache2

You can then configure SSL certificates inside your Virtual Host file.