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Configure which OS or kernel to Boot by Default in Ubuntu 24.04

Last updated: December 13, 2024 — Leave a comment

This is a step by step beginner’s tutorial shows how to set the default OS or kernel entry in Grub boot-menu in Ubuntu, Linux Mint, Debian or other Linux.

Most Linux today uses Grub2 to provide a menu on start-up, allowing to choose which operating system, which kernel, or recovery mode to boot.

It by default boots the first entry, while user can configure to automatically another menu entries without user interaction. And, here’s how to do the trick in 2 ways: from command line or use a graphical tool.

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How to Change Default OS Entry in Ubuntu 20.04 Dual-Boot

Last updated: April 12, 2020

Dual-boot or multi-boot Ubuntu 20.04 with other operating systems? This tutorial will show beginners how to change the default OS entry in Ubuntu 20.04 desktop.

This is a graphical tool to configure the default Grub boot-loader in Ubuntu. It’s Grub Customizer, and available in Ubuntu universe repositories for Ubuntu 19.04 and higher.

1. Either install Grub Customizer via Ubuntu Software, or open terminal (Ctrl+Alt+T) and install the tool by running command:

sudo apt install grub-customizer

2. Then search for and launch the tool from application menu.

3. When Grub Customizer opens, do:

  • navigate to General settings tab.
  • Select an OS entry as default from the drop-down box after ‘predefined’
  • You may also change other settings: menu timeout, kernel parameters, font, background image, etc.
  • Finally click the Save button to apply changes.

That’s it. Enjoy!

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