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A quick review of QubesOS Linux

QubesOS is a security-oriented, open-source and free desktop operating system for PCs/laptops that allows you to securely compartmentalize your digital life. It provide security through isolation. Virtualization is performed by Xen. The user environments can be based on Fedora, Debian, Whonix, and Microsoft Windows.

From the blog post:

Using GNU/Linux is by default more secure than using Microsoft Windows, this is common knowledge; however just because you use GNU/Linux, does not mean that your system is secure, and that is why some distributions have been created in order to maximize security; such as QubesOS.

QubesOS is very different from your typical run of the mill distro, such as Ubuntu or even the more hardcore like Arch Linux and Gentoo. QubesOS runs multiple virtual machines linked together under a single user-interface, to form a container based / compartmentalized operating system.

The purpose of this, is hypothetically speaking if an adversary were to gain remote access into your machine, they would be bound to only having access to the compartment they broke into.