Le 01/10/2019 à 19:57, MAILIST a écrit : > After 40 years of upgrading many different operating systems, > Windows (from 3.1 to 10), CentOS 6 to 8, Ubuntu, Fedora, Red Hat, > AT&T Unix, VAX VMS; I have never observed an upgrade from one major > version to the next to work. The last one I tried using their "upgrade > process" was Ubuntu 18 to 19. Didn't work. OpenSUSE Leap upgrades from one major version to the next work fine, provided you know what you're doing. * https://www.microlinux.fr/opensuse-leap-update-15-1/ In the past, I also performed major upgrades on Slackware servers, which were always perfectly documented by the distributor and worked without drama. Cheers, Niki -- Microlinux - Solutions informatiques durables 7, place de l'église - 30730 Montpezat Site : https://www.microlinux.fr Mail : info at microlinux.fr Tél. : 04 66 63 10 32 Mob. : 06 51 80 12 12