Qubes OS is a security-focused operating system from the desk through isolation based on the Xen hypervisor. Qubes OS is an operating system totally free and open source. Qubes takes an approach called security through compartmentalisation, which allows you to divide into isolated compartments safely called qubes. In other words, it runs each program separately in a totally isolated environment.
This is how Qubes OS offers the user greater security when working on the system, since if a program is compromised by an attacker, it will only obtain information about the compartment that it has managed to access.
Qubes achieves multiple virtual machines running on a Type 1 hypervisor they can be used safely as an embedded operating system.
For example, it puts all your application windows on the same desktop with specially colored borders that indicate the trust levels of their respective virtual machines.
Qubes handles different elements so that containers can interact with each other, andAmong the different types of virtual machines and elements we have: dom0, model virtual machines, model-based virtual machines, throwaway virtual machines and finally classic virtual machines.
What's new in Qubes OS 4.0.2?
In this new edition of Qubes OS 4.0.2, the system kernel has been updated to a more recent version since the Linux kernel included in this version is the version 4.19.89 in which the system based on its isolation of domains in two dimensions since with this the hardware controllers can be divided into different functional domains, such as network domains, USB controller domains, etc.
Another novelty that stands out in this second stable point version of Qubes 4.0 is that Many updates are included in initial release 4.0, in particular: all dom0 4.0 updates to date since this is the driver that is based on Fedora and is responsible for controlling the Xen hypervisor and allows the administration of all virtual machines (VM), in addition to having access to the network and the peripherals present are very limited .
From virtual machine models offered by the distribution, in this new version versions of Fedora 30 TemplateVM, Debian 10 TemplateVM, Whonix 15 Gateway, and Workstation TemplateVMs.
Qubes OS 4.0.2 represents all these virtual machines in the desktop environment xfce 4.12.3.
If you want to know a little more about this new version, you can read the details in the release note of Qubes OS 4.0 in the following link.
Download Qubes OS
If you want to try this Qubes OS pYou can do it by downloading the system image from its official website and in its download section you will get it, you can do it in the following link
Here you can find the ISO image to be downloaded directly or the torrent file to be downloaded by this means.
It is important to emphasize that Qubes OS can not only be installed as the main operating system, but also It offers the possibility of being able to test it in its Live version.
Qubes OS 4.0.2 image is approximately 4,5 GB and it can be recorded with the cross-platform Etcher tool on a USB storage device.
In the case of those who have the Qubes version 4.0 or 4.1, they can perform an update packages and in this way they will not have to install the new version of the system from scratch.
For this just open a terminal on your system and update the following items: Dom0, TemplateVMs as well as independent VMs (if they have one).
In the case of Sun0, We update this with the following command:
sudo qubes-dom0-update
Now for the case of TemplateVMs, you can perform the update from the icon of this tool that appears in the notification area. It can also be opened from the menu in System Tools.
Or from the terminal with one of the following commands:
Fedora
sudo dnf update
Debian
sudo apt-get update