Getting Access to Documentation Under Linux
One potential problem that the new user to Linux faces is that there are lots of new commands, features, applications and other items to learn about. Often there is a limit to what one can be expected to take in.
What Documentation is For
So to give you a hand remembering which commands to use, and any options they take, there is online documentation. The online documentation is just an aid to learning, not intended as an alternative to getting experience the hard way, taking a course or having a tame Linux guru on hand. You have been warned!