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How To Disable Grub Menu at Boot Time in Ubuntu 20.04?

Ubuntu 10

In this tutorial, we will walk you through the process of disabling the GRUB menu at boot time in Ubuntu 20.04. The GRUB (GRand Unified Bootloader) menu can be useful when you need to select different operating systems or different versions of the kernel at boot time. However, if you’re using a single operating system, you might want to disable this feature to speed up the boot process.

Quick Answer

To disable the GRUB menu at boot time in Ubuntu 20.04, you can modify the GRUB configuration file by setting GRUB_TIMEOUT=0 or GRUB_TIMEOUT_STYLE=hidden. After saving the changes, update the GRUB configuration with the command sudo update-grub.

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.

Accessing the GRUB Configuration File

To disable the GRUB menu at boot time, we need to edit the GRUB configuration file. Open your terminal and type the following command:

sudo nano /etc/default/grub

This command uses sudo to run the nano text editor with root permissions, allowing you to edit the /etc/default/grub file, which contains the GRUB configuration.

Modifying the GRUB Configuration

In the opened file, look for the line that reads GRUB_TIMEOUT. This line determines the amount of time (in seconds) that the GRUB menu will be displayed before the default entry is automatically booted. If you set this value to 0, the GRUB menu will not be displayed during boot.

Change the line to:

GRUB_TIMEOUT=0

If setting GRUB_TIMEOUT=0 does not work, you can try setting GRUB_TIMEOUT_STYLE=hidden. This option hides the GRUB menu but still allows it to be accessed by pressing the Esc key during boot. Add or modify the line to:

GRUB_TIMEOUT_STYLE=hidden

Saving Changes and Updating GRUB

After making the changes, save the file and exit the text editor. If you’re using nano, you can do this by pressing Ctrl+X, then Y to confirm that you want to save the changes, and then Enter to confirm the file name.

Next, you need to update the GRUB configuration to apply the changes. Run the following command in the terminal:

sudo update-grub

This command generates a new GRUB configuration file based on the changes you made to the /etc/default/grub file.

Final Thoughts

By following these steps, you should have successfully disabled the GRUB menu at boot time in Ubuntu 20.04. Keep in mind that if you have a dual-boot setup with Windows or another Linux distribution, it’s important to ensure that the default operating system is set correctly in the GRUB configuration.

Remember, changes to the GRUB configuration should be made with care. Incorrect settings can prevent your system from booting correctly. Always double-check your changes and make sure you have a recovery option available if something goes wrong.

How can I access the GRUB configuration file in Ubuntu 20.04?

To access the GRUB configuration file, open your terminal and type sudo nano /etc/default/grub. This command will open the file in the nano text editor with root permissions.

How do I disable the GRUB menu at boot time?

To disable the GRUB menu at boot time, you need to modify the GRUB_TIMEOUT line in the /etc/default/grub file. Set GRUB_TIMEOUT=0 to completely hide the menu or set GRUB_TIMEOUT_STYLE=hidden to hide the menu but still allow access by pressing the Esc key during boot.

How do I save changes made to the GRUB configuration file?

To save changes made to the GRUB configuration file using the nano text editor, press Ctrl+X to exit, then press Y to confirm saving changes, and finally press Enter to confirm the file name.

How do I update the GRUB configuration after making changes?

To update the GRUB configuration after making changes to the /etc/default/grub file, run the command sudo update-grub in the terminal. This command generates a new GRUB configuration file based on the changes made.

Are there any precautions I should take when modifying the GRUB configuration?

Yes, it is important to double-check your changes and make sure you have a recovery option available in case something goes wrong. Incorrect settings in the GRUB configuration can prevent your system from booting correctly.

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