Unifi Controller Installation - How To

Install Ubuntu 14.04 LTS (x64).  I installed with OpenSSH and LAMP as the defaults.

deb http://www.ubnt.com/downloads/unifi/distros/deb/ubuntu ubuntu ubiquiti

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv C0A52C50

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv 7F0CEB10

sudo apt-get update

sudo apt-get install unifi-rapid

sudo reboot

https://theipofyourserver:8443

Follow the prompts.

And how to update the controller

SSH into your controller

sudo apt-get update && sudo apt-get dist-upgrade

sudo apt-get install unifi-rapid

If the controller updates the firmware, next time you log into the website you’ll have the option to upgrade/reboot the access point(s).

http://community.ubnt.com/t5/UniFi-Updates-Blog/bg-p/Blog_UniFi