update-grub in Fedora 30

Для груба2 без uefi:

sudo grub2-mkconfig --output=/boot/grub2/grub.cfg

Ссылки:

1) https://fedoraproject.org/wiki/GRUB_2#Updating_GRUB_2_configuration_on_BIOS_systems

2) https://unix.stackexchange.com/questions/152222/equivalent-of-update-grub-for-rhel-fedora-centos-systems