$ sudo apt-get update
$ sudo apt-get install openvswitch-controller 

openvswitch-controller is installed in your system.

Make ensure the openvswitch-controller package were installed using the commands given below,

$ sudo dpkg-query -l | grep openvswitch-controller *

You will get with openvswitch-controller package name, version, architecture and description in a table

openvswitch-controller package basic information: