As per our first part, you now have your cluster all assembled and ready and want to install it. Do something with it already. For this we will have to download Raspbian Stretch Lite - a Linux distribution based on Debian and made especially for the Raspberry Pi. The ”Lite” version has an image file of 1,8GB and contains only the base system. We will not need an X server or a GUI to make our cluster functional and with Raspbian Lite we also save some space on the 16GB MicroSDHC card.
This is a companion discussion topic for the original entry at https://linuxconfig.org/building-a-raspberry-pi-cluster-part-ii-operating-system-installation