Upgrading Fedora Linux Using DNF System Plugin dnf-plugin-system-upgrade is a plugin for the DNF package manager and is used to upgrade your system to the current release of Fedora Linux. For Fedora Silverblue and Fedora CoreOS, which use rpm-ostree, you may refer to rpm-ostree documentation for details.
http://lxer.com/module/newswir....e/ext_link.php?rid=3