~#wget https://fw-download.ubnt.com/data/unifi-controller/c378-debian-9.3.43-a87cc777-6057-4ee5-a0fc-b0d1cda74358.deb
~#ls 
c378-debian-9.3.43-a87cc777-6057-4ee5-a0fc-b0d1cda74358.deb
~#sudo dpkg -i c378-debian-9.3.43-a87cc777-6057-4ee5-a0fc-b0d1cda74358.deb