Problems Updating Lubuntu 12.04, 12.10, and 13.04 on Slow Machines

[Yorvyk]

On 13/04/13 21:24, Ioannis Vranos wrote:
> I really messed this text today. The correct version:
>
> "dist-upgrade" is equivalent to "upgrade" + it removes obsolete
> packages.
>
This may be a misunderstanding of what you mean by obsolete but 
dist-upgrade doesn't delete obsolete packages.
 From synaptic man pages:-

Obsolete or locally installed - Display only packages that are not (for 
longer) included in one of the specified repositories.

 From the man pages for apt:-

upgrade is used to install the newest versions of all packages 
currently installed on the system from the sources enumerated in 
/etc/apt/sources.list. Packages currently installed with new 
versions available are retrieved and upgraded; under no 
circumstances are currently installed packages removed, or packages 
not already installed retrieved and installed. New versions of 
currently installed packages that cannot be upgraded without 
changing the install status of another package will be left at 
their current version. An update must be performed first so that 
apt-get knows that new versions of packages are available.

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. So, dist-upgrade 
command may 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.

--
Steve