$ dpkg -l|grep fan ii ubuntu-fan 0.12.8~16.04.1 all Ubuntu FAN network support enablement
$ man fanctl |grep "the keyword" network interface (the interface with the default route), the keyword
$ dpkg -l|grep fan
ii ubuntu-fan 0.12.8~16.04.1 all Ubuntu FAN network support enablement
$ man fanctl |grep "the keyword"
network interface (the interface with the default route), the keyword