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Building a Linux Web Server

Building a web server on Linux is a fundamental skill for sysadmins. In this project, you will learn how to configure a robust web server using Nginx or Apache, host a static website, and configure PHP for dynamic content.

Concepts​

A web server processes incoming network requests over HTTP and several other related protocols. Nginx and Apache are the most popular web servers in the world.

  • Nginx: Known for high performance and low resource consumption.
  • Apache: Known for flexibility and power, utilizing a module-based architecture.
  • Virtual Hosts / Server Blocks: Allow a single web server to host multiple domains.

Step-by-step Guide​

1. Installing the Web Server​

For Nginx on Debian/Ubuntu:

sudo apt update
sudo apt install nginx -y

2. Configuring Nginx Server Block​

Create a new configuration file for your domain:

sudo nano /etc/nginx/sites-available/example.com

Sample configuration:

server {
    listen 80;
    server_name example.com www.example.com;
    root /var/www/example.com/html;
    index index.html index.htm;

    location / {
        try_files $uri $uri/ =404;
    }
}

3. Enable the Site​

Create a symbolic link to the sites-enabled directory:

sudo ln -s /etc/nginx/sites-available/example.com /etc/nginx/sites-enabled/
sudo nginx -t
sudo systemctl restart nginx

Best Practices​

  • Security: Always use TLS/SSL certificates (e.g., Let's Encrypt).
  • Firewall: Only open ports 80 and 443 (HTTP/HTTPS).
  • Updates: Keep the web server software updated.