Qubes OS – security-oriented operating system
Quoting: Qubes OS - security-oriented operating system - LinuxLinks —
Qubes OS is a free and open-source, security-oriented operating system for single-user desktop computing. Qubes OS leverages Xen-based virtualization to allow for the creation and management of isolated compartments called qubes.
You can think of using Qubes OS as having many different computers on your desk for different activities but with the convenience of a single physical machine, a single unified desktop environment, and a set of tools for using qubes together securely as parts of a unified system.
Qubes takes an approach called security by compartmentalization, which allows you to compartmentalize the various parts of your digital life into securely isolated compartments called qubes.