Portable Z wave and ZigBee Gateway - martikainen87/Home-Automation GitHub Wiki
Raspbian Guide Etcher Download Original Guide
Start by downloading the raspbian Stretch Lite image (Headless linux install, no gui) and flash it to your SD card using Etcher.
Browse the SD card after and place an empty file called "ssh" into the root directory, then boot up your PI and login with
User: pi password: raspberry
run the command
passwd
Enter your old passwod and your new password.