$ sudo apt-get update
$ sudo apt-get install desktopnova-tray 

desktopnova-tray is installed in your system.

Make ensure the desktopnova-tray package were installed using the commands given below,

$ sudo dpkg-query -l | grep desktopnova-tray *

You will get with desktopnova-tray package name, version, architecture and description in a table

desktopnova-tray package basic information: