My knowledge of Linux is limited on what the best version is. There is a wealth of knowledge available here. A good place to start you be here:
A forum for general discussion of software defined radio (SDR) receiver equipment.
forums.radioreference.com
There are also some good tutorials here
I began with this page when I first started this project:
OP25 is a program that decodes P25 Phase 1 and Phase 2 digital radio. Some municipal areas are upgrading to P25 Phase 2 so almost gone are the days that you can track them with a police scanner since P25 is a Trunked Radio system and not just a lone frequency to monitor. The […]
www.hagensieker.com
Once you have OP25 up and running, I can for sure help out with the settings that I used depending on what you want to listen to and how you want to listen to it, meaning as a desktop scanner or if you want to stream it to listen remotely.