Ralph L; Hey ,
Allow me to intercede.
"apt-get upgrade" only updates installed packages as existing on the current install.
To see the relevant info; do in terminal:
In the event you have "old" software sources repositories enabled ... got some work cut out for us to get all squared away.
sudo apt-get update ##syncs the system data base with the repository
sudo apt-get upgrade ##updates installed packages
On a production server, General advise is to be aware of what is being updated !
ain't nothing but a thing