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Duplicating subsets of package selections between systems

May 17, 2010, 07:03 (0 Talkback[s])
(Other stories by jhansonxi)

[ Thanks to jhansonxi for this link. ]

"I'm building a pair of Ubuntu systems for kids. For a variety of reasons, including lack of time and hardware problems, this has taken far longer than expected and I ended up with one running 9.10 (Karmic Koala) and the other 10.04 (Lucid Lynx). Since the Karmic system has the most testing effort into it (reviewing games for stability and kid appropriateness) I needed a way to duplicate the selection of games on the Lucid system while filtering out everything else since some packages are release-specific.

"Using Synaptic it is possible to export (File > Save Markings) either a list of packages that have changed selection state but the changes haven't been applied yet or optionally a list of all packages and their status. While Synaptic can filter displayed packages by repository or type (the "section" parameter in the deb INFO file), these have no effect on the markings export.

"The apt-get command (or dpkg directly) can be used to create a full list of packages but to produce a filtered list you need to use aptitude."

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