What Is Web Server Apache in Linux?


Scott Campbell

What Is Web Server Apache in Linux?

The Apache HTTP Server, commonly referred to as Apache, is a powerful and widely-used web server software. It is open-source and available for multiple operating systems, including Linux.

Why Use Apache?

Apache remains the most popular web server software due to its stability, flexibility, and security features. It has a long history of development and has proven itself in various production environments.

Key Features of Apache

  • Open-source: Apache is free to use, modify, and distribute.
  • Cross-platform: It works on different operating systems like Linux, Windows, macOS, etc.
  • Modularity: Apache’s modular architecture allows for flexible configuration and customization.
  • Simplicity: It has a straightforward configuration process for basic setups.
  • Security: Apache provides numerous security features such as SSL/TLS support and access control mechanisms.

Installing Apache on Linux

To install Apache on a Linux system, follow these steps:

  1. Update the package repositories:
  2. $ sudo apt update
  3. Install the Apache package:
  4. $ sudo apt install apache2
  5. Start the Apache service:
  6. $ sudo systemctl start apache2

    You can now access your default Apache web page by entering your server’s IP address or domain name in a web browser.

Apache Configuration Files

The main configuration file for Apache is /etc/apache2/apache2.conf. It contains global configurations that apply to the entire server. Additional configurations for specific websites can be found in the /etc/apache2/sites-available/ directory.

Apache uses a hierarchical structure for configuration files, allowing administrators to easily manage multiple websites on a single server.

Virtual Hosts

A virtual host allows you to run multiple websites on a single Apache installation. Each website has its own configuration file located in /etc/apache2/sites-available/. To enable a virtual host, create a symbolic link from the sites-available directory to the sites-enabled directory:

$ sudo ln -s /etc/apache2/sites-available/example.com.conf /etc/apache2/sites-enabled/

Make sure to replace example.conf with the actual name of your website’s configuration file.

The Apache Service

To manage Apache as a service in Linux, you can use the following commands:

  • Start Apache:
  • $ sudo systemctl start apache2
  • Stop Apache:
  • $ sudo systemctl stop apache2
  • Restart Apache:
  • $ sudo systemctl restart apache2
  • Status of Apache:
  • $ sudo systemctl status apache2


Apache is a robust and flexible web server software that is widely used in the Linux community. Its popularity stems from its stability, security features, and ease of configuration. By understanding the basics of Apache, you can effectively host websites and provide a reliable web serving infrastructure.

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