Please ensure you have backed up your system and/or data in the event of a failed upgrade Preupg tool doesn't do the actual upgrade. Like:Ĭat > /etc//centos-upgrade.repo > /var/tmp/system-upgrade/base/mirrorlist.txtĮcho > /var/tmp/system-upgrade/extras/mirrorlist.txtĮcho > /var/tmp/system-upgrade/updates/mirrorlist.txt

There are some tasks you can do to prevent from unwanted results.