Step-by-step – GRUB Customizer Installation in Ubuntu 20.04

Installing

2. 2. Installing GRUB Customizer

   Then to Install GRUB Customizer in Ubuntu
   Simply play:

   sudo apt install grub-customizer

   Authenticate with the User Admin Pass.
   If Got “User is Not in Sudoers file” then Look: Solution

3. 3. Launching GRUB Customizer

   Finally, Launch & Enjoy GRUB Customizer.

   

   Or from Shell with:

   grub-customizer



So Now I am truly Happy if My Guide could Help you to Quick-Start with GRUB Customizer on Ubuntu 20.04 Focal!