The development cycle of the upcoming ubuntuBSD 15.10 operating system continues, and today we report on the release and immediate availability for download of the fourth Beta build.

ubuntuBSD 15.10 Beta 4 is out, as the project's developers have announced earlier on Twitter, and among various bug fixes and small under-the-hood improvements, they have managed to add the Xfe open-source software as the default file manager.

You can see the Xfe file manager running on top of the current development version of ubuntuBSD 15.10 in the screenshot attached on the right, but if you have the Beta 3 or a previous Beta release installed, there's no need to download today's ISO image.

If you just want to have the Xfe file manager installed, as well as the latest security patches released via the official repositories of the project, all you have to do is run the "sudo apt-get install xfe" command (without quotes) in the terminal app.

We've already told you everything we know so far about the ubuntuBSD project, but if you haven't had the chance to inform yourself on this unique operating system, you should read our initial report.

If you want to get started using ubuntuBSD on your computer, please visit its homepage and grab the installation-only ISO images via our website. ubuntuBSD brings you the powerful BSD kernel and the familiarity of Ubuntu Linux.

Early adopters can download ubuntuBSD 15.10 Beta 4 right now and help the developers discover issues before the final version goes live, which should happen quite soon.

#ubuntuBSD 15.10 BETA 4 is out! Includes #Xfe as default file manager https://t.co/EDSp65fY4b pic.twitter.com/kTeNa9q2Xk — ubuntuBSD (@ubuntuBSD) April 7, 2016