First - why this is still in Development Testing forum. Because Rolling still has not been announced to the public. We hope to do this soon. At present we are testing and fixing some things related to making .iso files. When this is done and normal testing for release is done we will be doing the public announcement. And then Rolling will join the “Official” family of OM Lx releases.
Now about the Rolling upgrade.
This is a major upgrade.
@bero began copy cooker 2 rolling April 3 and finished on April 4. It is important that you upgrade your Rolling (and Cooker) systems the correct way always:
$ sudo dnf clean all ; sudo dnf distro-sync
I had 2 Rolling VirtualBox VM’s that upgraded with no issues. At the end there are some questions asked about keeping current file or installing the package maintainers version. Normally accepting the defaults is safe. Packages you for sure want to keep the existing file are the ones that have your passwords. They are:
/etc/group /etc/gshadow /etc/passwd /etc/shadow
For those always select to keep the existing file.
Note: For Rolling (and Cooker) it is unwise to upgrade your system with Discover or dnfDragora. They use a command that is desigened to work best with our stable release but this command can lead to problems in a more dynamic environment like OM Lx Cooker or Rolling.