Plain guide!
You must have,
- Raspberry Pi 4 with power, HDMI and ethernet connectivity
- A micro SD card — 4GB or more to hold the OS and other files
- CentOS — Downloaded from http://mirror.nsw.coloau.com.au/centos-altarch/7.7.1908/isos/armhfp/ (or latest at your time)
I use Etcher to flash OS images to the micro SD Card. It comes for Linux, Mac OS and Windows.
