Linux is the operating system with an official but unsupported Spotify desktop version.
Spotify distributes a Linux client, making Linux different from operating systems such as Solaris, ChromeOS, and FreeBSD in this quiz. “Official” means the software is published by Spotify rather than being an entirely independent community client; “unsupported” means Spotify does not provide the same level of technical support or reliability guarantees it offers for its principal desktop platforms.
Linux is not one single desktop environment. It is a kernel used by distributions such as Ubuntu, Debian, Fedora, and Arch Linux, so installation details and compatibility can vary between distributions. Spotify’s Linux app has historically been delivered in formats such as Debian packages, while many users also access the service through the web player.
A common mix-up is confusing Linux support with Spotify Connect. Connect lets a device control playback on compatible speakers, televisions, cars, and other hardware; it is not a separate desktop operating-system version. Another distinction is that a browser can run Spotify on many systems, but that does not make each system an officially supported native desktop client.