upgrading Fedora using dnf system-upgrade

upgrade_fedora

// in case you have VirtualBox and kmod-vbx, akmod-vbx, remove them
sudo dnf update
sudo dnf clean all
sudo dnf distro-sync --allowerasing
sudo dnf upgrade --refresh
sudo dnf system-upgrade download --releasever=NUM
sudo dnf system-upgrade reboot
sudo rpm --rebuilddb
sudo rpmconf -a
sudo dnf remove -y google-chrome-\* && sudo dnf install -y google-chrome-stable