Display a list of packages that match the packages specification and that are installed or available for installation.
List all installed or available packages.
List packages on the repository that are available for installation.
List packages on the system that are not available on any repository specified in the configuration file.
List installed packages.
List installed packages that are made obsolete by any packages in any repository in the configuration file.
List packages that have been recently added to any repository in the configuration file.
List packages that have updates available for installation.