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Set the default startup system to win10 for dual system win10 and ubuntu.

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This article explains how to set Windows 10 as the default operating system when dual-booting with Ubuntu 20.04. The steps involve accessing the terminal in Ubuntu, modifying the GRUB_DEFAULT value to the desired system number, and updating the grub file before restarting the system.

index_img: https://pic.uc23.net/uploads/images/thumbnews/2020/0609/1591696802823739.jpg
title: Set default startup system as win10 for dual boot win10 and ubuntu
date: 2022-11-17 16:38:20
updated: 2022-11-17 16:38:20
comments: true#

After installing Ubuntu 20.04 system under win10, the default startup system is Ubuntu.

To set the default startup system as win10, follow these steps:

  1. Enter the ubuntu system and press Ctrl+Alt+T to open the terminal.

  2. Enter the command:

    or go to the /etc/default/ folder, open the terminal, and enter the command:

    sudo gedit grub

    Modify the 6th line GRUB_DEFAULT=0 to the system number you want to start by default, and save after setting;

    The system number is the menu order when starting, starting from 0. Ubuntu is the default first, with a number of 0. Win10 is usually the 5th, with a number of 4. So set GRUB_DEFAULT=4.

  3. Enter the (sudo) update-grub command to update the grub file.

  4. Restart the system to default to the Windows system.

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