If you check soon after application start, you will see the system.properties file in directory /var/lib/unifi, which is soft linked from /usr/lib/unifi/data. I don't know the unifi application post installation initialisation process, but it could be that the system.properties file needs time to be generated. Hi believe the /usr/lib/unifi/data/system.properties (No such file or directory) error only occurs the first time the unifi application starts, following the installation. Running chown -R unifi:unifi /usr/lib/unifi allowed the service to restart successfully. Unifi: WARN Unable to load properties from '/usr/lib/unifi/data/system.properties' - /usr/lib/unifi/data/system.properties (No such file or directory)Ĭhecking the permissions on /usr/lib/unifi showed that everything was owned root:root, while all processes were running under user unifi. With a fresh Ubuntu 20.04 install, the script worked to install UniFi 6.1.71-15061-1, except the web interface wouldn't start, and this message was reported by systemctl status: # echo 'deb xenial/mongodb-org/3.4 multiverse' | sudo tee /etc/apt//mongodb-org-3.4.list # sudo apt-key adv -keyserver -recv 06E85760C0A52C50
# echo 'deb stable ubiquiti' | sudo tee /etc/apt//100-ubnt-unifi.list # sudo apt install -yes ca-certificates apt-transport-https Which is available from the Ubuntu 20.04 main repository. # unifi has since been updated to work with mongodb-server 3.6. # Previous install steps from when unifi still required mongodb-server <= 3.4. Sudo systemctl status -no-pager -full rvice rvice Sudo apt install -yes openjdk-8-jre-headless unifi Sudo apt install -yes apt-transport-httpsĮcho 'deb stable ubiquiti ' | sudo tee /etc/apt//100-ubnt-unifi.list # Thanks to for posting the updated install steps. # As tested on a fresh install of ubuntu-20.04.1-live-server, August 22nd 2020. # Install Ubiquiti Unifi Controller on Ubuntu 20.04.