Make sure you have a good & reliable
SD card and a proper power supply
. Archives can be uncompressed with 7-Zip
on Windows, Keka
on OS X and 7z on Linux (apt-get install p7zip-full). RAW images can be written with Etcher
(all OS). Where images are compressed with .xz you can wrtite them to the SD card with Etcher
Insert the SD card into the slot, connect a cable to your network if possible or a display and power your board. (First) boot (with DHCP) takes up to 35 seconds with a class 10 SD Card.
Log in as: root
. Then you are prompted to change this password (US-Keyboard setting). When done, you are asked to create a normal user-account for your everyday tasks.