Howto install icinga with the new PHP based web interface on Ubuntu 12.04

I had a hard time finding good articles about how to install icinga with the new web based PHP interface on Ubuntu 12.04.
I didn't want to grab the sources and compile it. Not that I am not able to do that, but in my opinion it should be an easier way to install it. We are living in 2013 and not in the last century ...
Anyway, to make a long story short I found a very good step by step guide on askubuntu which worked for me exactly the way it was described.
Kudos!

Open Source Monitoring Software

Ever heard of Hyperic (http://www.hyperic.com/)? Well, I would not be surprised if you haven't. I stumbled across this free and easy to use software a few days ago when I was searching a for a monitoring software to monitor my JBoss and Tomcat servers.
This software is able to monitor nearly everything (Application Servers, Databases, Servers, Networks, etc.) and comes free of charge. It's well designed using a JBoss Application server and written entirely in Java.
All you have to do is to install the small agent on the machine you want to monitor and install the server software to gather all informations. The GUI is completely available as a web frontend so every administrator in your company's internet can monitor the servers without installing additional software on their clients.

JAMon to monitor performance of Java programs

I discovered a nice open source monitoring API called JAMon, which aggregates the monitoring results and performs the calculation in memory. It claims to do this in a very fast way, so you can use the tool even in production environment.

It comes with a very handy and useful web application for viewing and querying the statistics.

Combined with AspectJ anyone is able to insert performance monitoring code into an existing application without touching the existing code.