Open a Terminal:

Press Ctrl + Alt + T to open a terminal window.

Update Package Lists:

It's a good practice to start by updating the package lists to ensure you have the latest information about available packages:

sudo apt update

You can install Nginx by running the following command:

Install Nginx:

sudo apt install nginx

This command will install the Nginx web server along with its dependencies.

Start and Enable Nginx Service:

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

sudo systemctl start nginx
sudo systemctl enable nginx

This will ensure that Nginx starts automatically when the system boots up.

Verify Installation:

You can verify that Nginx is running by opening a web browser and navigating to http://localhost. You should see the default Nginx welcome page indicating that Nginx is installed and working.

If you want to access the server from another device on your network, you can use the IP address of your Ubuntu machine instead of localhost.

Configure Firewall (if necessary):

If you have a firewall enabled, you may need to allow traffic on port 80, which is the default port for HTTP:

sudo ufw allow 80/tcp

If you're planning to use SSL (HTTPS), you'll also need to allow traffic on port 443:

sudo ufw allow 443/tcp

**Finally, reload the firewall rules: **

sudo ufw reload