The parameter that you wish to set.
## GRUB < 2 ##
In the case of GRUB < 2, this will be something like ‘default’, ‘timeout’, etc…
See ‘info grub` for additional information.
## GRUB >= 2 ##
With GRUB >= 2, this will be ‘GRUB_DEFAULT’, ‘GRUB_SAVEDEFAULT’, etc..
See ‘info grub2` for additional information.