Linux APT commands

After initial install run:
sudo apt-get update

To update installed applications:
sudo apt-get upgrade

To install the 'cheese' package:
sudo apt-get install cheese

To remove the 'cheese' package:
sudo apt-get remove cheese

To clean the APT database:
sudo apt-get clean   or sudo apt-get autoclean

To have a good clear up:
sudo apt-get autoremove