Or VirtualBox (or VMWare). (There's nothing novel in this suggestion, but since it hasn't been mentioned here, yet.) If you can use it in your current work en

Or VirtualBox (or VMWare). (There's nothing novel in this suggestion, but since it hasn't been mentioned here, yet.) If you can use it in your current work environment, you can start shifting work items over and see how it goes / (re)learn a "UNIXy" way. Having real goals, and payoffs, is a big motivator.