How can I run UniFi Controller on different ports

By default, UniFi controller runs on these ports
unifi.shutdown.port=8081 (for management purpose)
unifi.http.port=8080 (device inform)
unifi.https.port=8443 (controller UI / API)
portal.http.port=8880 (portal redirect port for HTTP)
portal.https.port=8843 (portal redirect port for HTTPs)
unifi.db.port=27117 (local-bound port for DB server)
Follow these steps to change the default settings
Make sure UniFi is not running
modify <unifi_base>/data/system.properties and make sure all ports needed by UniFi are available
restart UniFi