Lately I'm seeing the GRUB menu appear when booting my machine. This happened after I put in an old drive that had a different [separate] Ubuntu installation on it. (This old drive has since been wiped and is now used as a backup location.) Do I need a boot loader if I have only one OS? Is it safe to remove GRUB completely?
1 Answer
Do not remove grub - it is your bridge between bios and operation system (just as @user535733 described).
If you do not want to see the grub while starting open the file /etc/default/grub (use sudo with your editor) and change the lines to
GRUB_TIMEOUT=2
GRUB_TIMEOUT_STYLE=hidden
This will hide the menu but still will give the chance to enter it - when you press the ESC key while booting see reference
sudo update-grub
?