6.5 Editing the Boot Menu

The next step is to modify the Ubuntu boot menu. Since this was originally a dual boot system, the menu is configured to provide the option of booting either Windows or Ubuntu. Now that the Windows partition is gone, we need to remove this boot option. On Ubuntu this can be achieved by running the update-grub command as follows:

# update-grub

Sourcing file `/etc/default/grub’

Generating grub configuration file ...

Found linux image: /boot/vmlinuz-5.3.0-42-generic

Found initrd image: /boot/initrd.img-5.3.0-42-generic

Found linux image: /boot/vmlinuz-5.3.0-28-generic

Found initrd image: /boot/initrd.img-5.3.0-28-generic

Found memtest86+ image: /boot/memtest86+.elf

Found memtest86+ image: /boot/memtest86+.bin

Since there is now only one operating system to boot, the system will automatically boot Ubuntu on the next restart without displaying the boot menu. If you need to access this boot menu, for example to use the advanced boot options, simply press the Esc key during the initial stages of the startup process.