The First Contact with Linux System

Recently,i learn some skills about Linux System.First,i learn something about starting.Then,i try some other orders to try this system.I put in 'who' which can show the people online.Meanwhile,because of it's function of broadcasting,i learn to transfrom some messages to others.When i write 'write 6026' and then input the words you want to say,6026 can receive the message.It's so interesting.When you want to broadcast,put in 'wall' and then don't forget the words you want to broadcast,everybody can receive the message you send.Due to my first trial for Linux System,i am too poor to practice.I need more practice so that i can be called 'Master'.