====== Install Unifi Controller 5.8 on Ubuntu 16.04 (Xenial) LTS ======

-- //Tested with **Ubuntu 16.04 (Xenial) LTS** and **Zabbix Controller 5.8.28** on **September 2018**// --


==== Add UniFi Repository =====

  echo 'deb http://www.ubnt.com/downloads/unifi/debian stable ubiquiti' | sudo tee /etc/apt/sources.list.d/100-ubnt-unifi.list
  sudo apt-key adv --keyserver keyserver.ubuntu.com --recv 06E85760C0A52C50
  sudo apt update

==== Install OpenJDK and UniFi =====
  sudo apt install openjdk-8-jre
  sudo apt install unifi

==== Check for issues ====
Have a log at syslogs with
   sudo tail -f /var/log/syslog
If you see errors like
  [...] unifi error: Service killed by signal 11
you have encoutered a [[https://community.ubnt.com/t5/UniFi-Wireless/IMPORTANT-Debian-Ubuntu-users-MUST-READ-Updated-07-06-17/m-p/1968252#M233999|know bug]].
To solve the issue type
  echo "JSVC_EXTRA_OPTS=\"\$JSVC_EXTRA_OPTS -Xss1280k\"" | sudo tee -a /etc/default/unifi
and restart the controller with 
  sudo systemctl stop unifi
  sudo systemctl start unifi
Note that unifi restart could take a lot of time. If you are in hurry, you can kill stuck unifi processes manually with kill -9 before restarting the service (or reboot the machine :)

==== Open Web Interface ====
Now you can point your browser to
  https://your-server-address:8443/