Linux is an open-source operating system.
Linux is considered as fully functional Unix operating system.
Linux have capability to setup, support and maintain a network.
Linux includes a set of Unix shells such as BASH,TCSH, and the Z shell,can easily use these shells,using the same Unix commands, and configuration features.
Linux is used by wide range of applications

In 1991, Linus Benedit Torvalds invented Linux

Linux follows file system hierarchy standard(FHS).FHS helps to locate the files and directories in the Linux file structure.

Linux kernel is free and open source(FOSS).

Linux Distribution contains kernel as the important central point of operating system surrounded by the FOSS components to produce full operating system functionality.This contains system libraries,GUI ,database,web servers,etc.

There are several Linux distribution, freely available and customized according to the needs of different users.