Aurora
Aurora is a Fedora Silverblue-based Linux distribution with the goal of being a general-purpose workstation. It uses the KDE Plasma desktop.
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Vanilla OS
Vanilla OS, a fixed-release distribution based on Debian (formerly Ubuntu, prior to version 2) with the GNOME desktop, is an immutable operating system. The core parts of the system are locked down to prevent unwanted changes and corruption from third-party applications or a faulty update.