Fedora-FreeBSD-dual-boot #Fedora 25 and FreeBSD 11 #in Fedora cd cd /etc/grub.d/ emacs (or your favorite editor) 40_custom (add my 40_custom configuration) grub2-mkconfig >/boot/efi/EFI/fedora/grub.cfg reboot #you are ready to use Fedora and FreeBSD