When highly technologically advanced software like Linux comes for free then why should I go for any other operating system. Linux has very less vulnerabilities compared to other operating systems. Many small, medium to big size companies are switching from Windows to Linux. Even Universities prefer Linux Operating System.
Methodology: Internet has a huge database on Linux Operating System and I'm going to make use it. There are many Journals and articles written by experts on Linux Operating System are available in Internet, which will be helpful in my research. I would also refer textbooks available in library.