I just recently started school for computer programing and my first class is going to be teaching the fundamentals of programing using Python. At my school, the operating system is Lenix, but at my home, my operating system is Windows xp. I tired to do some of my homework at home and encountered some problems. On the school computers, from the Python command promt, I can input commands like "ls" to get a listing of the folder, and "pwd" to print the current directory and "mkdir" to make a new directory. At home however, those commands don't work, I get a "name is not defined" message. ( I can however assign integers and stuff like that) Is there something I can do to fix this? Or is this just one of the examples of why programmers prefer Lenix to Windows (so I've been told)?