lol... thats like asking how someone could open a door, It can be as simple as turning a knob, or as difficult as c4 on a solid steel vault, it all depends on the security methods that are used to protect the door and the hacker's experience. If you want to know how to hack, you have to learn, not be taught, you don't learn to speak english by someone teaching you, someone could give you a 14 hour speech on speaking english you still would not understand a word, you can be given information, but unless you actually play around with your own systems and learn things on your own, you'll never stand a chance at understanding any advice you'd be given here.