How to edit GRUB Default Operating System? [duplicate]

dual-boot grub2 windows-7 13.10

Solution 1:

use grub-set-default

$ sudo grub-set-default ENTRY

ENTRY is a number or a menu item title

or edit /boot/grub/grub.cfg

sudo chmod +w /boot/grub/grub.cfg
sudo vi /boot/grub/grub.cfg 
   change "0" in line: set default="0" to your choice
sudo chmod -w /boot/grub/grub.cfg

Solution 2:

How do I set Windows to boot as the default in the boot loader?

This question was discussed previously and a detailed answer could be found here...

How do I set Windows to boot as the default in the boot loader?

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