Where gcc come from when using lunux terminal? : I'm a beginner of linux, and I don't know the commands details now. I have a question about where I can get some packages from. For example, when I want to get "gcc", I entered "yum install gcc". Where it comes from Internet Web? or linux has it from the beginning? I was a windows user ,and then I went to Websites to get "gcc" and download it at the page. I'm puzzled where I can get "gcc" from.