Hi Ferdie
Debian has multiple package management commands but the most used are the following:
apt-get : APT is for Advanced Package Tool. It supports installing packages over internet using ftp or http protocols. You can also upgrade all packages in a single operations, which makes it even more attractive.
dpkg : Debian packaging tool which can be use to install, query, uninstall packages.
I prefer apt-get and have included some examples:
apt-get update: updates all your packages
apt-get install (package name): Install a a package
apt-get remove (package name):Remove a package but keep the config files
apt-get --purge remove (package name): Remove a package and config files
