efibootmgr

Manipulate the UEFI Boot Manager. More information: https://manned.org/efibootmgr.

• List the current settings then bootnums with their name:
  efibootmgr
• List the filepaths:
  efibootmgr -v
• Add UEFI Shell v2 as a boot option:
  sudo efibootmgr -c -d {{/dev/sda1}} -l {{\EFI\tools\Shell.efi}} -L "{{UEFI Shell}}"
• Change the current boot order:
  sudo efibootmgr -o {{0002,0008,0001,0005}}
• Delete a boot option:
  sudo efibootmgr -b {{0008}} --delete-bootnum