apt-get update; apt-get install ca-certificates curl -y
sudo -i (Ubuntu) or su (Debian)
curl -sO https://get.glennr.nl/unifi/install/install_latest/unifi-latest.sh && bash unifi-latest.sh
or for specific versions curl -sO https://get.glennr.nl/unifi/install/unifi-6.5.55.sh && bash unifi-6.5.55.sh