Tweak Ubuntu GRUB

What is GRUB?

GRUB is a bootloader, it is the first thing that loads when the computer starts. It allows you to have different operating systems, and versions of them, on the same or different hard drives. GRUB offers various boot options. Timeout is one of GRUB's options which allows you to set a delay in seconds to select an item from menu. The default value of this option is 10 seconds. However, you can reduce this value if you want to have a shorter delay.

How to do

Step 1: Backup your Grub boot menu

sudo cp /boot/grub/menu.lst /boot/grub/menu_backup.lst

Step2: Open your Grub boot menu

sudo gedit /boot/grub/menu.lst

Step 3: Search for "timeout"
Use hotkeys Ctr+F and enter string "timeout', then click "Find" button to find out

Step 4: Change the value of timeout to 2

timeout 2

Step 5: Save the file and restart Ubuntu to see the effect