$ sudo apt-get update
$ sudo apt-get install nvidia-340-uvm 

nvidia-340-uvm is installed in your system.

Make ensure the nvidia-340-uvm package were installed using the commands given below,

$ sudo dpkg-query -l | grep nvidia-340-uvm *

You will get with nvidia-340-uvm package name, version, architecture and description in a table

nvidia-340-uvm package basic information: