Hilofat, while the reply which you received is correct, it is not quite the one which I would have given you.

I'm sure you've heard the old "print is dead" lecture, but having a bookshelf with some well-selected books is, IMO, very helpful. In your situation, you might want to get a copy of Daniel J. Barrett's Linux Pocket Guide , published by O'Reilly Media. It gives the novice a handy guide to hundreds of Unix commands. It is also a popularly-priced paperback in a compact format.

I hope this helps...