This tutorial is going to show beginners how to easily disable or hide the Grub boot menu on startup.

Without dealing with Ubuntu configuration files, this can be easily done via a graphical tool called Grub Customizer.

1. Grub Customizer is not available in Ubuntu repositories until Ubuntu 19.04. So first open terminal (Ctrl+Alt+T) from application menu, then run command to add the software PPA:

sudo add-apt-repository ppa:danielrichter2007/grub-customizer

Type user password (no asterisks feedback) when it prompts and hit Enter to continue.

2. Then install the tool via command:

sudo apt install grub-customizer

3. Search for and launch Grub Customizer from application menu:

4. When the tool opens, do:

• navaigate to Generate settings tab,
• un-check the checkboxes for ‘show menu’ and ‘look for other operating systems’,
• finally click the Save button to apply changes.

That’s it! For temporary use, you can press and hold the Shift key to access the grub boot menu on startup.