Install Linux, Apache, MySQL, PHP (LAMP) stack on Ubuntu 16.04

A "LAMP" stack is a group of open source software that is typically installed together to enable a server to host dynamic websites and web apps.

Prerequisites
 initial server setup for Ubuntu 16.04. on-root user account with sudo privileges set up on your server.

Step 1: Install Apache and Allow in Firewall
We can install Apache easily using Ubuntu's package manager, apt. 
For our purposes, we can get started by typing these commands:

• sudo apt-get update
• sudo apt-get install apache

Adjust the Firewall to Allow Web Traffic

If you look at the Apache Full profile, it should show that it enables traffic to ports 80 and 443:

sudo ufw app list

Output
Available applications:
  Apache
  Apache Full
  Apache Secure
  OpenSSH

If you look at the Apache Full profile, it should show that it enables traffic to ports 80 and 443:

sudo ufw app info "Apache Full"

You can do a spot check at: http://your_server_IP_address 

Step 2: Install MySQL

To install MySQL. MySQL is a database management system. Basically, it will organize and provide access to databases where our site can store information.

sudo apt-get install mysql-server

Step 3: Install PHP

PHP is the component of our setup that will process code to display dynamic content. It can run scripts, connect to our MySQL databases to get information.

sudo apt-get install php libapache2-mod-php php-mcrypt php-mysql

This should install PHP without any problems. We'll test this in a moment.

Step 4: Test PHP Processing on your Web Server

We will call this script info.php. In order for Apache to find the file and serve it correctly, it must be saved to a very specific directory, which is called the "web root".

In Ubuntu 16.04, this directory is located at /var/www/html/. We can create the file at that location by typing:

sudo nano /var/www/html/info.php

This will open a blank file. We want to put the following text, which is valid PHP code,

info.php

The address you want to visit will be:

http://your_server_IP_address/info.php

Yu have a LAMP stack installed, you have many choices for add more modules or enbale SSL.