Eric S. Johansson
esj at harvee.org
Sat Jun 25 11:58:34 UTC 2005
Robert Valk wrote:
> I think this is a really fantastic idea, and I'd love to get involved
> or start something up. Learning Python at the moment (that's the Ubuntu
> 'lingua franca' yes?).
> I've been thinking a lot about an Ubuntu 'system restore' - what would
> need to be saved and in what form.
> I think the big saving grace is that people who need such a feature -
> ma, pa and co., are not the people who would go messing manually with
> config files and such. Conversely, people who do write their own X11
> config by hand are savvy enough to make their own backups. I reckon the
> best approach is the apt 'undo' layer someone suggested - being able to
> roll back changes made with the debian packaging framework. apt does so
> much of the hard work, it just needs that user-friendly ubuntu-isation
> on the top.
backup is hard to matter what you do and restore is even more difficult.
But I think there may be a solution if we're willing to accept a
I propose separating the base system and the site-specific modifications
into two separate regions. The base OS plus any changes to the base
(security, bug fixes etc.) go into the base region. Any site-specific
changes such as applications or configuration changes go into the
site-specific region. The two regions are merged dynamically (unionfs?)
such that anything in the site-specific region is dominant and
supersedes anything in the base region. making changes to files or
directories should be automatically placed in the site-specific region.
Backup and restore becomes much easier because the changes have been
preserved separate from the base system.
It's a rough idea. I think it has merit because it solves problems we
all wrestle with. It solves the backup problem but it also solves the
upgrade/install problem to some degree. We'll still have a problem with
overwriting configuration files within one layer. But even that can be
solved if we store changes in a third layer. (Base, site-specific
packages, site-specific changes).
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