Mac OSX Terminal – Get Active Interface

This will let you know which network interface you are actively using should you have Wi-Fi and Ethernet connected.

route get default | grep interface | awk '{print $2}'

Get name of network interface

ActiveNetwork=$(route get default | grep interface | awk '{print $2}')
ActiveNetworkName=$(networksetup -listallhardwareports | grep -B 1 "$ActiveNetwork" | awk '/Hardware Port/{ print }'|cut -d " " -f3-)
echo $ActiveNetwork
echo $ActiveNetworkName