Guys, I used to use linux a while back, but for some reason I got lazy. I am looking at a company that mainly runs linux and I could probably get my foot in the door, but I don't want to look like an idiot.

I am looking for a selection of flavors that would best suite a novice looking to learn everything from basic maintenance to running a web server and maybe even some development.

It needs to be compatible with a Dell Latitude D800 and also be able to using the built in wireless, since I can hardwire it for the installation, I expect this system to be mobile.

Can I get a couple suggestions? Much appreciated.