Linus Torvald did not know that his personal project on a new free operating system kernel would become a fad someday. The Linux kernel in its primitive form was of no practical use. But later, Linux and the GNU developers allied in order to integrate the GNU components with Linux so as to make a working, effective and free operating system. Talking about the current scenario, Linux is open to myriads of developers all around the world for improvisation and innovation. This makes it a top choice among the developers. But...