Linux Torvalds developed the first version of Linux in 1991 as an operating system for computers powered by the intel microprocessor. Started as a terminal emulator Linux evolved over a period. What is an operating system ? The operating system is considered as a part of the system responsible for basic use and administration. This includes the kernel and device drivers, boot loaders, command shell or other user interface and basic file and system utilities. The term system, in turn refers to the operating system and all the application running on top of it. The user interface is the outermost portion of the operating system, the kernel is the innermost. The kernel sometimes referred as the supervisor, core or internals of the operating system. Typical components if the kernel are interrupt handlers to service interrupt requests, a scheduler to share the processor time among multiple processes, a mem...