After upgrading four Fedora systems (x86_64) from release 26 to 27, using # dnf system-upgrade download –refresh –releasever=27 –allowerasing –nogpgcheck –best -y, two of these worked OK, but two failed – with a sudden reboot, back to F26 – and no (apparent) error displayed, after # dnf system-upgrade reboot had rebooted the system, and the upgrade process … Continue reading →