Question: I want to learn C , UNIX and LINUX, and more about embedded systems. Very much interested in them. Are there any online courses or websites which can guide me. And please suggest books to read in learning them.

Thanks for your time.

Ya please lets your answers and comments come in , they are invaluable to me..!!

Answer: 
I'd highly recommend "UNIX for dummies" as a starting point on Unix/Linux.
There are many amazing resources online. My favorite is from MIT.

<http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/>

Free courses. They can be pretty in depth, and cover many more subjects than just computer science and mathematics.