A look into CBL-Mariner, Microsoft's internal Linux distribution – OSnews
First thing to understand about Mariner is that is not a general purpose Linux distribution like Ubuntu or Fedora, it was created by Microsoft’s Linux System Group which is the same team at Microsoft which created the Linux kernel used for Windows Subsystem for Linux version 2, or WSL2. The goal of Mariner is to be used as an internal Linux distribution for Microsoft’s engineering teams to build our cloud infrastructure and edge products and services. Of course Mariner is open source and it has its own repo under Microsoft’s GirHub organization. No ISOs or images of Mariner are provided...