$ sudo apt-get update
$ sudo apt-get install rabbitvcs-nautilus 

rabbitvcs-nautilus is installed in your system.

Make ensure the rabbitvcs-nautilus package were installed using the commands given below,

$ sudo dpkg-query -l | grep rabbitvcs-nautilus *

You will get with rabbitvcs-nautilus package name, version, architecture and description in a table

rabbitvcs-nautilus package basic information: