This tutorial is going to show you how to install Apache, MariaDB and PHP7 (LAMP stack) on Debian 9 stretch. LAMP is the most common web service stack for building dynamic websites and web applications. It’s made up of four components – Linux, Apache, MySQL/MariaDB, PHP – Linux is the operating system; Apache is the web server; MySQL/MariaDB is database; PHP is a server-side scripting language.