Ubiquiti UniFi Controller install script for RapspberryPi (with Raspbian Buster lite) install:
cd /tmp
wget https://raw.githubusercontent.com/steigerbalett/ubiquitiunificontroller/master/rpi-install.sh
sudo bash rpi-install.sh
After installation & reboot you can access your Raspi-Ubiquiti-Controller at port 8443: https://x.x.x.x:8443
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sources:
https://j2ablog.wordpress.com/2018/01/29/install-ubiquiti-unifi-controller-on-raspberry-pi/
https://blog.krannich.de/unifi-controller-auf-raspberry-pi-3-rpi3-installieren/
https://blog.marcelhuss.de/2017/11/12/unifi-controller-unter-raspbian-stretch-installieren/