Linux is an open-source operating system that means, it is completely free. Linux can be used as a LIVE operating system using USB drives and the OS can be fully updated while it is running! Linux can be made as small as tinyOS [15Kb] or as big as an OS used in supercomputers. Linux Kernels are damn stable. The command line or the terminal is the heart of Linux that allows you to run pretty much everything using the command. Linux is more secured compared to other Operating Systems. Linux asks for authentication before installing any application. It’s very less likely to be infected with Malware in Linux.

Linux is open-sourced. That means, millions of contributions every day. This resulted in an enormous amount of distros being congenital. Linux distros have millions of non-profit oriented developers' contribution. This image can give you an imagination about Linux's diversity.