Operating system is the “heart” part of a system. There are lot many operating systems like Windows, Linux, etc., Without the operating system the system cant perform any action. OS acts as an interface between the human and the system. The OS gets the command from the user and it Performs the action. Some OS’s are user friendly like windows and some are tough to understand like Linux operating system. Linux is an open source operating system. The operating system decides the factor of speed , Compile time, run time , performance of the system.