What is Linux ?
Linux, more correctly called GNU/Linux, is an operating system that was initially developed for Intel x86 based personal computers and is now also available for nine other computer architectures. A Linux distribution (distro) is a software collection which includes the Linux kernel, selected GNU utilities and application programs. Different distributions are intended for a particular audience and kept up to date by the distribution maintainers.
Linux software is often categorised as Free and Open Source Software (FOSS), which allows the source code to be freely used, modified and distributed according to the terms of the relevant license.