<snip>
> dist-upgrade
> dist-upgrade in addition to performing the function of upgrade, also intelligently
> handles changing dependencies with new versions of packages; apt-get has a "smart"
> conflict resolution system, and it will attempt to upgrade the most important packages
> at the expense of less important ones if necessary. The dist-upgrade command may
> therefore remove some packages. The /etc/apt/sources.list file contains a list of
> locations from which to retrieve desired package files. See also apt_preferences(5)
> for a mechanism for overriding the general settings for individual packages.