Some years ago I did play with Red Hat and Lindows(before they had to change the name), and back than I didn't like it. So just not to long ago about 3 or 4 months I decided to try Ubuntu 11.10 and wow it has change since the dark ages, I have been learning a lot about and even started using the terminal for commands, reminds me the days when I had to use DOS. I do use Windows 7, but the more I play with Linux the more I like it. I have a degree in Network Administration and wondering should I learn Linux for my career path, none of the classes I have taken have taught any and if so what Linux Version would be best to learn from from stand alone to a server version.
For personal use I want to eventually go Linux one day from this computer, it is a laptop and keep my windows on another computer. What would be the best version of Linux to learn other than Ubuntu, what other great web sites are there out there, and what are the best books to buy to learn and reference guides for Linux. Let me Know.