Sparky APTus Upgrade (aka System Upgrade) is a small tool which:
Sparky APTus Upgrade is preinstalled in all Sparky editions, if not install it:
sudo apt-get install sparky-aptus-upgrade
Sparky APTus Upgrade provides the RECOMMENDED way to upgrade your Sparky installation and lets you keep the system up-to-date.
Starting from version 0.3.15, there is a command line tool which lets you fully upgrade your OS via one command: