# apt-get install package
||Download lists of new/upgradable packages.
||Perform an upgrade.
# apt-get remove package
||Remove packages includes configuration files.
# apt-get purge package
||Remove automatically all unused packages.
# apt-get autoremove package
||Erase downloaded archive files.
||Erase old downloaded archive files.
||Download the binary package into the current directory.
||Download and display the changelog for the given package.
||Assume "yes" as answer to all prompts.
# apt-get -y install package
||Perform a simulation of events that would occur based on the current system state but do not actually change the system.
||Package files are only retrieved, not unpacked or installed.
||Produces output suitable for logging, omitting progress indicators.
||Show full versions for upgraded and installed packages.
||Attempt to correct a system with broken dependencies in place.
||Print out a list of all packages that are to be upgraded.