Linux is free open-source software which means the source code is available for the operating system, which can be edited according to specific needs.
LIGHTTPD (pronounced "lighty") is an open-source web server more optimized for speed-critical environments than common products while remaining standards-compliant, secure and flexible.
MySQL is a multithreaded, multi-user, SQL database management system (DBMS) now owned by Oracle Corporation.
PHP is a reflective programming language originally designed for producing dynamic web pages. PHP is used mainly in server-side application software. Perl and Python can be used similarly..