Manipulate the UEFI Boot Manager. More information: https://manned.org/efibootmgr.
efibootmgr
efibootmgr -v
sudo efibootmgr -c -d /dev/sda1 -l \EFI\tools\Shell.efi -L "UEFI Shell"
sudo efibootmgr -o 0002,0008,0001,0005
sudo efibootmgr -b 0008 --delete-bootnum