From nakedsecurity.sophos.com
Almost everyone’s heard of Linux – it’s the operating system kernel that’s behind a significant proportion of servers on the internet, including most of Google, Facebook, Amazon and many other contemporary online juggernauts.
In its Android flavour, Linux powers the majority of smartphones out there, and in one form or another it’s also the kernel of choice for many so-called IoT devices such as bike computers, home Wi-Fi routers, webcams, baby monitors and even doorlocks.
Most people who use Linux know that the name is a sort-of pun on Unix, the operating system that Linux most resembles.
And Unix, of course, is the operating system behind a significant proportion of the devices out there that don’t run Linux, being at the heart of Apple’s macOS and iOS systems, as well as the various and widely-used open source BSD distributions.