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Originally Posted by TadW
If you upgrade Ubuntu or Debian, all your installed packages need to be reinstalled. Thanks to the Debian packaging system (aptitude/apt-get/dpkg), the upgrades will not randomly overwrite your config files but ask you what to do (skip/overwrite/edit). Does ipkg have a similar system in place?
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But the thing is that they're automatically reinstalled . That's the quid of upgrading the distribution, as Debian is more a collection of packages tuned to work together than a Base OS and independent applications with dependencies (the way is in OSX, Win an the BSDs).
As for the other question, yes, ipkg has a similar system in place ("ipkg update" "ipkg upgrade"). I've done that on OpenWRT systems to upgrade from one WhiteRusian version to the next without problems, and respected my additional installed packages. Background: OpenWRT is another of the distributions for embedded systems that use ipkg, this one geared to linksys routers (WRT54GL, ...) and workalikes.