Howtoforge posted a tutorial about installing Nginx on Ubuntu 12.04 LTS
Nginx (pronounced "engine x") is a free, open-source, high-performance HTTP server. Nginx is known for its stability, rich feature set, simple configuration, and low resource consumption. This tutorial shows how you can install Nginx on an Ubuntu 12.04 LTS server with PHP5 support (through PHP-FPM) and MySQL support (LEMP = Linux + nginx (pronounced "engine x") + MySQL + PHP).Installing Nginx With PHP5 (And PHP-FPM) And MySQL Support (LEMP) On Ubuntu 12.04 LTS