As far as basic command line stuff, it's all the same.
If you're trying to prep for a class, I'd probably find who's teaching it and ask them what they do their coarse work with
Not really for a specific class. More along the lines that some time down the road I will be a professional witness in a court of law where my forensics work will be on the line and I need to know that I did every thing right as far as recovering the data.
I've had a C++ class, some Java classes, little bit of PERL, Unix, COBOL class, but that was some 10 years ago when I was going for my associates degree.
Thanks for the great suggestions. I will take a look into those options.