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. These qubes, which are implemented as virtual machines (VMs). This allows each component of the operating system to be isolated from other pieces, preenting compromises from spreading or information from leaking.
To compare the software in this project to the software available in other distributions, please see our Compare Packages page.
Notes: In case where multiple versions of a package are shipped with a distribution, only the default version appears in the table. For indication about the GNOME version, please check the "nautilus" and "gnome-shell" packages. The Apache web server is listed as "httpd" and the Linux kernel is listed as "linux". The KDE desktop is represented by the "plasma-desktop" package and the Xfce desktop by the "xfdesktop" package.
Colour scheme:green text = latest stable version, red text = development or beta version. The function determining beta versions is not 100% reliable due to a wide variety of versioning schemes.
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Qubes is awesome for teaching the basics of how to use virtualization to increase security. I ran it as a daily driver for quite some time until I decided to switch to OpenBSD because not a huge XFCE fan in general. I still use it one my big slow hard drive that I use to back all my other stuff up with. Its great for that in that you can run whatever OS as a guest to back up the filesystem you care about natively. And with LVM it will actually create the filesystem with native performance which is great. Its still probably the most secure OS there is but it has other use cases as well. I deducted 1 point because forced to use XFCE which not a huge fan of.
Rocking Qubes on a 2011 laptop (2nd gen Intel i5 (Hyperthreading disabled), 8GB RAM, 128GB SSD) is WAY smoother than you'd think, you can eaisly run up to ~10 VMs without any performance issues, even with a full KDE Plasma desktop which is notorious for being a resource hog
Best parts about it are the control over networking, on a VM for accessing your home network you can limit outgoing connections to just the LAN, or for a vault VM you can cut networking altogether for peace of mind, being able to use DisposableVMs for anything that doesn't need persistent storage eg. browsing the web, and the fact it's just a Type 1 Hypervisor, you can literally run Windows on it if you want
Even for advanced users it can be difficult to use because of it's abstractions like templates, ServiceVMs and the global clipboard, but the wiki is amazingly written, getting you ready in a couple minutes
The pages for advanced users are on par, or even better than Arch Wiki, with pages on practically anything you could ever want to modify on the base system
Before installing you should read the Wiki first. At the end of the day Qubes isn't a silver bullet, but a tool (arguably the best one) for keeping yourself safe, and what good is a tool you don't know how to use?
I use it every day, it is like one mega-OS. Any distro of linux you want - you have. The support is great, forum is very actice and has many helpful guides so that you arent aimlessly looking forever for a solution to your issue. Many popular companies/people use qubes for its security such as MULLVAD and Let's Encrypt. Only thing is that the mirror system is quite slow, yes it is a big download (6GB) but could have better mirror support upon install. Not an issue however, as the main system is wonderful.