Very often I've had issues of apt and yum either uninstalling during an upgrade, or not working afterwards.
i'd be impressed if yum removed something that was not obsoleted during an upgrade. The code that follows out removal dep trees is never encountered during an upgrade request.
That is why there is an "or" in there. For instance, if you upgrade RH 8.0
to RH 9 via apt-get using the FL test version of apt-get, it uninstalls
apt during the upgrade! If you can get yum to upgrade to an rpmlib newer than
that built into yum, then yum won't work afterwards... In other words, there
are ways to cause problems with both programs if you try hard enough...
Now, I've never had either one mess anything up without telling me that it would (or least might) do so first, and making me confirm the action after that warning was issued. So, it's up to the user to protect themself from themself. ;)
-sv
-- Eric Rostetter
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