yum upgrade from F17 to F18

[Kevin Kofler]

Kevin Fenzi wrote:

> On Fri, 09 Nov 2012 20:16:50 +0100
> Roberto Ragusa <mail at robertoragusa.it> wrote:
> 
>> Serious question: why usrmove is not doable?
>> If you have all the dirs in your path, and move executable files from
>> one place to another, why should this fail?
> 
> All your dynamic libraries move?

If you do the move with a single C/C++ program rather than a shell script, 
the libraries are already loaded in memory when they move, so it wouldn't be 
an issue at all. Doing it with a shell script is trickier, but the UsrMove 
folks actually had that working (with LD_PRELOAD tricks), before it was 
decided that doing it in dracut was somehow "safer" (which sucks, because it 
makes the process much less convenient than a simple script or binary to 
run).

> You need selinux relabling?

SELinux is evil…

> I have been using yum upgrades on some of my machines here for many
> years, but there's often a weird broken dep or something I need to
> tweak for it to work right, for example:
> 
> * Every release there are a few packages that were removed, so when you
>   upgrade to the new release you have to remove them yourself.

Same with the "supported" upgrade types.

        Kevin Kofler