CBL-Mariner Install How to (July 2021):
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CBL-Mariner is Microsoft's new Linux distribution, manly used internally for Asure, and in the future for Linux subsystem for Windows 2 to support GUI.
It started development in 2020 and first official release in early 2021.
Microsoft does not provide an ISO at all, so the public must build it, and third-party build ISO's are currently non exsistant (July 2021).
This is to make a installer, not a all ready installed disk, also this is for x86, not arm. There is no Rasbperry PI support yet.

Get prerequisites:
sudo apt install make tar wget curl rpm qemu-utils golang-go genisoimage python2-minimal bison gawk

Clone Git:
git clone https://github.com/microsoft/CBL-Mariner.git

Navagate & set up:
cd CBL-Mariner/toolkit
git checkout 1.0-stable

Build x86 iso:
sudo make iso REBUILD_TOOLS=y REBUILD_PACKAGES=n CONFIG_FILE=./imageconfigs/full.json


Where ISO builds to:
../out/images/full/full-1.0.20210728.1745.iso

Critical Note: Only successfully boots on VirtualBox.  VMware, the boot loader will fail to pass on to Linux and put it into a permanent re-boot loop.

Sources:
https://linuxiac.com/microsoft-cbl-mariner-linux-1/
https://github.com/microsoft/CBL-Mariner/blob/1.0/toolkit/docs/building/building.md
https://github.com/microsoft/CBL-Mariner/issues/1191
https://en.wikipedia.org/wiki/CBL-Mariner

Date: July 28th, 2021