Rich Gwilliam's digital shed
Is your fridge running (Linux)? Then you'd better go and catch it. Er, Linux.
Linux is a pretty broad category. There're hundreds of variants ("distributions") that can in some regards be thought of as the designs that come with a Lego set: they're largely built with similar components that work well together and mostly just represent a recommended starting place for your system.
Once you've got that race car in your hands, there's absolutely nothing stopping you from attaching a ray-gun to the bonnet and putting a llama in the driving seat.
While Linux does have a "Windows-like" interface - in fact it's got several - it's an operating system that does benefit very much from the ability to use the terminal to achieve things.
As well as being the basis for Android phones - and the UI for some white goods like fridges - most stats have Linux's share of web server usage at something like 80%. Being able to configure and debug a Linux setup is, I would say, an essential part of being a "full-stack" developer.
Personally I'm pretty familiar with Debian-based distros like Ubuntu, Mint or DietPi, although I'm also very happy in Fedora or Amazon Linux 2 - I would say a must when working with EC2.
I've been using Linux since May 2012 (13 years).
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