It's Ubuntu MATE 15.04 for the Raspberry Pi 2, you can find more details and download link here: https://ubuntu-mate.community/t/ubuntu-mate-15-04-for-raspberry-pi-2/517.
This video show how to download and burn microSD on Ubuntu Linux.
And my first boot Ubuntu MATE 15.04 for Raspberry Pi 2:
The OS unresponsive at the first boot only. After sometime, it become more smooth.
I always run apt-get update and upgrade on Raspberry Pi/Raspbian. The first time it run more than 14 hrs to finish.
$ sudo apt-get update
$ sudo apt-get upgrade
This video below show remote login Ubuntu MATE 15.04 for Raspberry Pi 2 with ssh from PC running Ubuntu Linux. Then install xrdp on ubuntuMATE@RPi 2, and login xrdp using Remmina.
After installed, the microSD partition to have 4G only. I use Linux GUI program gparted to resize the file system.
- Ubuntu MATE for the Raspberry Pi 2 officially
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