With GRUB 2 on Debian and Ubuntu, I like to edit /etc/default/grub and set
GRUB_CMDLINE_LINUX="" or GRUB_CMDLINE_LINUX_DEFAULT="". I’m removing “quiet” and “splash”
because I want to see all the boot messages.
Then run sudo update-grub to make the change take effect in /boot/grub/grub.cfg.
