[ Thanks to Falko
Timme for this link. ]
“This article describes how you can upgrade your Fedora 15
system to Fedora 16. The upgrade procedure works for both desktop
and server installations.“1 Preliminary Note: The commands in this article must be
executed with root privileges. Open a terminal (on a Fedora 15
desktop, go to Applications > System Tools > Terminal) and
log in as root, or if you log in with a regular user, type
su to become root.“Please make sure that the system that you want to upgrade has
more than 600 MB of RAM – otherwise the system might hang when it
tries to reboot with the following message (leaving you with an
unusable system):“Trying to unpack rootfs image as initramfs…”