Parcel Tracker has been updated to include more package tracking options. They now include: Russian Post, EMS Post, USPS, Posta, Post Danmark, Swiss Post, Fedex, DHL Germany, UKR Poshta, UPS, Correios, Posten, Privpak Schenker and Was Schenker.
Installation in Ubuntu is simple. Open a terminal and copy and paste in these commands...
sudo add-apt-repository ppa:torkvemada/torkvemada
sudo apt-get update && sudo apt-get install parcel-tracker
Press enter and the app will install and since you are adding the repository for this app it will always stay up to date.