Too Long; Didn't Read
However, this combination of tools in Linux continued as many programmers put together several sets of software tools with the freely available Linux kernel to cater to various needs or devices. That is how Linux distributions (i.e., Debian, Ubuntu, Fedora etc.) came about and that is why Linux runs on almost every device including PCs, servers, mobile phones, embedded systems etc. Hence, a Linux distribution/distro is a combination of the Linux kernel and a given set of software tools that work together.