- Optional for non-Dedicated servers:
File a "Miscellaneous" Support Ticket to switch the firmware to UEFI on your server. Wait for them to do it.
- Boot into Rescue Mode.
- Destroy all your data:
wipefs -a /dev/sda
curl "https:// url for live image .iso" > /dev/sda
- reboot
- When you see the boot menu, choose the installation from RAM.