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How To Change the GRUB Boot Order for Dual-Boot Windows and Ubuntu

Ubuntu 9

If you’re running a dual-boot setup with Windows and Ubuntu, you may sometimes need to change the default boot order. This can be done by tweaking the GRUB (GRand Unified Bootloader), which is the default bootloader for Ubuntu. In this article, we’ll guide you through the process of changing the GRUB boot order.

Quick Answer

To change the GRUB boot order for dual-boot Windows and Ubuntu, you can use either Grub Customizer or manually edit the GRUB configuration file. Grub Customizer provides a graphical interface to easily rearrange the boot order, while editing the configuration file allows for more precise customization. Remember to save and apply the changes by updating GRUB after making any modifications.

What is GRUB?

GRUB is a bootloader package developed to support multiple operating systems and allow the user to select among them during boot-up. It is the reference implementation of the Free Software Foundation’s Multiboot Specification, which provides a user the choice to boot one of multiple operating systems installed on a computer or select a specific kernel configuration available on a particular operating system’s partitions.

Method 1: Using Grub Customizer

Grub Customizer is a graphical interface to configure the GRUB2/BURG settings and menu entries.

Installation

To install Grub Customizer, open your terminal and run the following commands:

sudo add-apt-repository ppa:danielrichter2007/grub-customizer
sudo apt-get update
sudo apt-get install grub-customizer

Changing Boot Order

Once installed, open Grub Customizer. You’ll see a list of all the operating systems that you can boot into. To change the boot order, simply select the operating system and use the up or down arrow to move its position. For instance, if you want Windows to be the default option, move it to the top of the list.

Don’t forget to click on the save button to apply the changes.

Method 2: Manually Editing the GRUB Configuration File

If you’re comfortable with using the terminal, you can change the boot order by editing the GRUB configuration file.

Backing Up the Configuration File

Before making any changes, it’s a good idea to back up the original configuration file. You can do this with the following command:

sudo cp /etc/default/grub /etc/default/grub.bak

This command uses the cp (copy) command to create a backup of the file /etc/default/grub and names it grub.bak.

Editing the Configuration File

Next, open the configuration file with a text editor. You can use any text editor you like, but for this example, we’ll use nano:

sudo nano /etc/default/grub

Look for the line that says GRUB_DEFAULT=0. This line tells GRUB to boot the first operating system in the list (in computer language, the count starts from 0). To change the default boot option, replace the 0 with the position of the desired operating system in the GRUB menu (remember, the count starts from 0). So, if Windows is the 5th item in the list, you would change this line to GRUB_DEFAULT=4.

After making the change, save and close the file. In nano, you can do this by pressing Ctrl+X, then Y, then Enter.

Updating GRUB

Finally, apply the changes by updating GRUB with the following command:

sudo update-grub

This command generates a new GRUB configuration file based on the default settings and the changes you made.

Conclusion

Changing the GRUB boot order is a straightforward process, whether you prefer using a graphical interface or the command line. Remember to always back up important files before making changes, and make sure to apply the changes by updating GRUB. Happy tweaking!

What is the purpose of GRUB?

GRUB is a bootloader that allows the user to select among multiple operating systems installed on a computer during boot-up.

How can I change the default boot order in GRUB?

There are two methods to change the default boot order in GRUB. You can either use a graphical interface called Grub Customizer or manually edit the GRUB configuration file.

How do I install Grub Customizer?

To install Grub Customizer, open your terminal and run the following commands:

sudo add-apt-repository ppa:danielrichter2007/grub-customizer
sudo apt-get update
sudo apt-get install grub-customizer
How do I open Grub Customizer?

Once installed, you can open Grub Customizer by searching for it in your applications menu or by running the command grub-customizer in the terminal.

How do I manually edit the GRUB configuration file?

To edit the GRUB configuration file, open your terminal and run the command sudo nano /etc/default/grub. This will open the file in the nano text editor.

How do I back up the GRUB configuration file before making changes?

To back up the GRUB configuration file, run the command sudo cp /etc/default/grub /etc/default/grub.bak. This will create a backup named grub.bak.

How do I update GRUB after making changes to the configuration file?

After making changes to the configuration file, run the command sudo update-grub to update GRUB and apply the changes.

How do I save and close the configuration file in `nano`?

To save and close the configuration file in nano, press Ctrl+X, then Y, then Enter.

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