Explanation : Linux is a multi-user multi-tasking, time-sharing operating system. It was originally designed and developed by Linus Benedict Torvalds in the year 1991. The basic objective behind
developing Linux is to bring out an operating system, which was low in cost and had power of the Unix operating system.
Linux operating system provides both types of interface. It supports CUI and GUI both. Linux is the quite a versatile, powerful, and standard operating system. It gained its popularity because of its portability and robustness. Linux is one of the popular versions of UNIX operating System. It is an open source as its source code is freely available. It is free to use. Linux was designed considering UNIX compatibility. Its functionality list is quite similar to that of UNIX.