check out the coolest way to achieve the stack that you want to install.
easyengine (ee) is a linux shell-script to manage your WordPress-Nginx websites on Ubuntu (12.04, 12.10, 13.10 & 14.04)/ Debian (6,7) server.
It is made for WordPress-nginx sites. You can install Nginx, PHP, MySQL, Postfix, phpMyAdmin and their dependencies in one go!
Just 3 commands which make your life much easier.
curl -sL rt.cx/ee | sudo bash # install easy-engine
ee system install # install nginx, php, mysql, postfix
ee site create example.com --wp # install wordpress on example.com
If there is something, that you need to have cleared up, go through the FAQs.
And if you need help, we are always there. :)
Twitter handle: @easyengine