If you don't know how to code, then you can learn even if you think you can't. Thousands of people have learned programming from these fine books:
Codecademy is the easiest way to learn how to code. It's interactive, fun, and you can do it with your friends.
Linux Command Line Cheat Sheet from DaveChild. A cheat sheet of the commands I use most for Linux.
free university lectures online - computer science, mathematics, physics and more
If you're curious about learning a programming language, you're in luck: there's no shortage of resources for learning how to code online.