LAMP PHP 8.x Ubuntu 21.10 Installation – Step-by-step

Getting Started

5. 5. Testing LAMP

   Finally, to Test LAMP WebServer Installation
   Access the Server document’s location:

   cd /var/www/html

   Create a PHP Info file:

   sudo nano info.php

   If Got “User is Not in Sudoers file” then see: How to Enable sudo
   And Append:

   <?php
   phpinfo();
   ?>
   

   Ctrl+x to Save & Exit from nano Editor ;)
   Set www-data as owner of Web Server main Directory:

   sudo chown -R www-data:www-data /var/www

   Then Open on Browser the URL:
   http://localhost/info.php
   
   You should Successfully see the PHP Info notice similar to here above :)

How to Create an Apache 2 Virtual Host on Ubuntu 21.10 Impish.

GNU/Linux Apache2 Virtual-Host Quick Start
GNU+Linux Apache2 VHost