What is Linux?
Linux is a type of operating software. It is a UNIX-like operating software, which means that it has developed from UNIX and follows the "Unix philosophy". This includes concepts such as the use of plain text for storing data, as well as a hierarchical file system and the use of a large number of software tools. It also treats devices and certain types of inter-process communication (IPC) as files.
Linux is open source, which means that it is free to use and modify depending upon the preference of the user. Linux was first released by Linus Torvalds on September 17, 1991, and is in fact named after him.