Linux is a tried-and-true, open-source operating system released in 1991 for computers, but its use has expanded to underpin systems for cars, phones, web servers and, more recently, networking gear.

When we talk about computers -- PCs, smartphones, cars -- we generally assume that there's just one operating system: A single, monolithic piece of software that manages each individual piece of ...

Even if you’re a smartphone pro, there could be a lot to learn in the sections below. But if you’re new to the world of smartphones — or just the world of Android — this is the perfect place to get up ...