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How To Set GRUB Timeout to 0 on Ubuntu 18.04

Ubuntu 10

GRUB, or the Grand Unified Bootloader, is a key part of many Linux distributions, including Ubuntu 18.04. It’s the screen that appears when you first boot up your computer, allowing you to select which operating system to use. By default, GRUB waits for a few seconds before automatically booting the default operating system. However, if you want to speed up your boot time or simply don’t need the GRUB menu, you can set the GRUB timeout to 0. This article will guide you through the process.

Quick Answer

To set the GRUB timeout to 0 on Ubuntu 18.04, you need to modify the /etc/default/grub configuration file. Locate the line that says GRUB_TIMEOUT and change the value to 0. Save the changes, update GRUB, and restart your computer. Afterward, your system will boot the default operating system immediately without displaying the GRUB menu.

Understanding GRUB Timeout

The GRUB timeout is the number of seconds the GRUB menu will display before it automatically boots the default operating system. By setting this value to 0, the GRUB menu will not display at all, and the system will boot the default operating system immediately.

Modifying the GRUB Configuration File

To set the GRUB timeout to 0, you need to modify the /etc/default/grub configuration file. Here’s how:

  1. Open your terminal. You can do this by pressing Ctrl + Alt + T on your keyboard.
  2. Enter the following command to open the GRUB configuration file in the nano text editor:
    sudo nano /etc/default/grub
    The sudo command allows you to run commands with administrative privileges, while nano is a simple, easy-to-use text editor included with most Linux distributions.
  3. In the file, locate the line that says GRUB_TIMEOUT. This line determines how long GRUB waits before booting the default operating system.
  4. Change the value of GRUB_TIMEOUT to 0, so the line reads GRUB_TIMEOUT=0. If the line is not present, add it. Make sure the line is uncommented (i.e., there is no # at the beginning of the line).
  5. Save the changes by pressing Ctrl + O and then hit Enter. Exit the nano editor by pressing Ctrl + X.

Updating the GRUB Configuration

After modifying the GRUB configuration file, you need to update GRUB for the changes to take effect. Here’s how:

  1. In the terminal, run the following command:
    sudo update-grub
    The update-grub command generates a new GRUB configuration file based on the settings in /etc/default/grub and other configuration files.
  2. Wait for the command to complete. It should display a message saying that the operation was successful.
  3. Finally, restart your computer to apply the changes. You can do this by running the command:
    sudo reboot

After your computer restarts, it should boot the default operating system immediately, without displaying the GRUB menu.

Conclusion

Setting the GRUB timeout to 0 can help you boot your Ubuntu 18.04 system more quickly, especially if you only have one operating system installed. However, remember that if you need to access the GRUB menu again, you’ll need to press and hold Shift during boot.

Remember to be careful when modifying system files, as incorrect changes can cause issues with your system. If you encounter any problems, you can always change the GRUB_TIMEOUT value back to its original value and update GRUB again.

How can I access the GRUB configuration file?

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

What does it mean to uncomment a line in the GRUB configuration file?

Uncommenting a line in the GRUB configuration file means removing the # symbol at the beginning of the line. This allows the line to be read and executed by the system.

How do I save changes in the nano text editor?

To save changes in the nano text editor, press Ctrl + O to write the changes to the file, and then hit Enter.

How can I exit the nano text editor without saving changes?

To exit the nano text editor without saving changes, press Ctrl + X. You will be prompted to save changes, and you can choose to discard them by pressing N or Ctrl + C.

What does the `sudo update-grub` command do?

The sudo update-grub command generates a new GRUB configuration file based on the settings in /etc/default/grub and other configuration files. It updates the GRUB menu to reflect any changes made.

How can I restart my computer using the terminal?

To restart your computer using the terminal, run the command sudo reboot. This will initiate a system reboot. Note that you may be prompted to enter your password before the restart occurs.

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