Did Microsoft just sneak out its own Linux distro?

Linux
(Image credit: Image Credit: Pixabay)

Microsoft has quietly released the first stable release of its Linux kernel-based distro on GitHub under the MIT open source license. 

But before you head off to download and take it for a spin, you should know that the distro, named CBL-Mariner, isn’t designed to be used as a general purpose distro and doesn’t put out easy to use ISO images. 

Developed and maintained by the Linux System Group at Microsoft, CBL-Mariner is in fact Microsoft’s internal Linux distro that’s specially tuned for use within its cloud infrastructure and edge products and services.

Microsoft and Linux

Microsoft has long shunned its former “Linux is a cancer” belief and has embraced the technology and open source in general because it makes good business sense to do so. 

Besides its numerous, regular contributions to the Linux kernel, usually to ensure its cloud offerings run flawlessly atop the kernel, the software behemoth owns GitHub, arguably the largest repository of open source software, and CBL-Mariner is just one of a handful of projects of the Linux System Group at Microsoft.

The adventurous can follow the instructions of Microsoft engineer Juan Manuel Rey and install the distro inside a virtual machine. 

However, for the rest of us, the best bet to bridge the gap between Windows and Linux is to use the Windows Subsystem for Linux 2 (WSL2), which not is not only based on a release from the Long Term Support (LTS) Linux kernel 5.10 branch, but can now also run graphical Linux apps seamlessly on the Windows 10 desktop.  

Mayank Sharma

With almost two decades of writing and reporting on Linux, Mayank Sharma would like everyone to think he’s TechRadar Pro’s expert on the topic. Of course, he’s just as interested in other computing topics, particularly cybersecurity, cloud, containers, and coding.

Read more
Close up of the Linux penguin.
Best Linux distro for Windows users of 2025
Linux Mint 21.2 main image
Linux Mint 21.2 review
Google Chrome
Linux Foundation brings together top browser makers for more "open" approach
Windows 11 Start menu layout choices: Grid view
Windows 11 vs Linux for business: which operating system should you embrace?
Zorin OS 17 main image
I tried the latest version of Zorin OS - here's what I thought of this Linux distro
A person in a wheelchair working at a computer.
Best Linux distro for beginners of 2025
Latest in Software & Services
TinEye website
I like this reverse image search service the most
A person in a wheelchair working at a computer.
Here’s a free way to find long lost relatives and friends
A white woman with long brown hair in a ponytail looks down at her computer in a distressed manner. She is holding her forehead with one hand and a credit card with the other
This people search finder covers all the bases, but it's not perfect
That's Them home page
Is That's Them worth it? My honest review
woman listening to computer
AWS vs Azure: choosing the right platform to maximize your company's investment
A person at a desktop computer working on spreadsheet tables.
Trello vs Jira: which project management solution is best for you?
Latest in News
DeepSeek
Deepseek’s new AI is smarter, faster, cheaper, and a real rival to OpenAI's models
Open AI
OpenAI unveiled image generation for 4o – here's everything you need to know about the ChatGPT upgrade
Apple WWDC 2025 announced
Apple just announced WWDC 2025 starts on June 9, and we'll all be watching the opening event
Hornet swings their weapon in mid air
Hollow Knight: Silksong gets new Steam metadata changes, convincing everyone and their mother that the game is finally releasing this year
OpenAI logo
OpenAI just launched a free ChatGPT bible that will help you master the AI chatbot and Sora
An aerial view of an Instavolt Superhub for charging electric vehicles
Forget gas stations – EV charging Superhubs are using solar power to solve the most annoying thing about electric motoring