Apt-Get Update/Upgrade: A Beginners Introduction
The most fundamental of software packages in the Debian/Ubuntu World is the Apt-Get package management system. This utility allows the updating of a OS to currently available standards. The Apt system automatically downloads a list of available packages from a specified file repository, scans the list, compares the list to the currently installed packages, then updates accordingly. Use Apt regularly to update your OS 
The following is a beginners tutorial on how to implement an Apt-Get update process. First open a terminal windows located in the application menu on the upper gnome panel. Enter the following command to update the apt system:
sudo apt-get update
Then issue the following command to upgrade your operating system:
sudo apt-get upgrade
The following is a video showing an implementation of the previous two commands:
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