The Jupiter Nano ships with a debian image. However, not everyone wants to use debian. Also, something like Yocto allows you to heavily customize your linux image as well as reduce your boot time considerably. Check out this post that lays the foundation for creating a Yocto image.
The Jupiter Nano is an open-source hardware based on an awesome MPU product from Microchip called the SAMA5D27C-LD1G. The boards exposes a lot of IO in spite of a tiny form-factor, boots a full-fledged linux distro as well as can support microcontroller-like development flow.
In the tenth part of this series on Yocto, we talk about SDKs! How to build them, install them and finally use them to build your next awesome application!
I recently came across a wonderful, tiny, fully open-source board on CrowdSupply and loved it. Here's my take on this!