this looks like hack, not professional solution for upgrading between major versions. Why isn´t there interface like yast wagon ?
Sometimes, doing any sort of server upgrade can be a time-consuming process. That’s especially true if you are still using physical media and have to manually tend each machine during the upgrade process. Well—with OES 2015 SP1, you can now use the patch or upgrade channel to do your upgrades. This should reduce the time it takes to get to the latest version of Open Enterprise Server.
In a new YouTube video, Lothar Wegner, an SE specializing in the File & Networking and Collaboration solutions from Micro Focus, shows you how this can be done. He also explains which previous versions of OES you can do this channel upgrade from and walks you through some critical steps you’ll need to do to have the best experience.
Speaking of Open Enterprise Server 2015 SP1, here’s a short list of new and improved features that are included with this latest version: