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Distribution Upgrade tools for Ubuntu

-------------------------------------

This tool implements the spec at:

https://wiki.ubuntu.com/AutomaticUpgrade

Broadly speaking a upgrade from one version to the next consists

of three things:

1) The user must be informed about the new available distro

(possibly release notes as well) and run the upgrade tool

2) The upgrade tool must be able to download updated information

how to perform the upgrade (e.g. additional steps like upgrading

certain libs first)

3) The upgrade tools runs and installs/remove packages and does

some additional steps like post-release cleanup

The steps in additon to upgrading the installed packages fall into this

categories:

* switch to new sources.list entries

* adding the default user to new groups (warty, scanner group)

* remove packages/install others (breezy, R:mozilla-firefox, RI:firefox,

install ubuntu-desktop package again, R:portmap, I:language-package*)

* check conffile settings (breezy: /etc/X11/xorg.conf; warty: /etc/modules)

* ask/change mirrors (breezy)

* breezy: install new version of libgtk2.0-0 from hoary-updates, then

restart synaptic

* reboot

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