Qubes OS 40 Published by

The fourth release candidate for Qubes OS has been released for testing. Qubes OS is a free and open-source, security-oriented operating system for single-user desktop computing based on Xen-based virtualization to allow for the creation and management of isolated compartments called qubes.



Qubes OS 4.2.0-rc4 is available for testing

We’re pleased to announce that the fourth release candidate (RC) for Qubes OS 4.2.0 is now available for testing. 

Main changes from RC3 to RC4

For an overview of major changes from Qubes 4.1 to 4.2, please see the  Qubes OS 4.2.0 release notes.



Qubes OS 4.2.0-rc4 is available for testing