On a fresh vps build of Ubuntu16/18 from the media library users have to run upgrade manually as grub2 is not updated in the current ISO package and I haven't found a way to run grub2 upgrade with using unattended and force-confdefThe reason they have this issue is when running a script for installing some software on their vps these scripts generally will do upgrade which obviously won't work and locks up apt.So is there a way to get an upgraded iso from virtualizor which won't have this issue?