Upgrading with preupgrade: flawless!

[Marcel Rieux]

Some people here said that, despite Fedora suggesting not to upgrade
with yum, they did so and had good results. If this is the way to
upgrade with yum:

http://fedoraproject.org/wiki/YumUpgradeFaq#Instructions_to_upgrade_using_yum

I can tell you that upgrading with preupgrade from Fedora 11 to 12 is
much simpler. Here's what I did, following the instructions:

1) Do a back-up, just in case.

2) In gnome-terminal:

su
yum update
preupgrade

One, two, ? clicks

3) Go for a long bath.

4) Reboot the computer. The downloaded packages will install. So...

5) Eat supper

6) The computer will reboot automatically at the end and voilà!

Everything works.