So how do you make GRUB2 sleep for a number of seconds? Try out the following three command strings from the GRUB2 prompt: Type sleep 10, and nothing appears on the screen for 10 seconds. Type sleep -v 10, and you will see the number of seconds displayed counting down from 10 to 0. Type sleep -i -v10, and you can press the ESCAPE key at any time to return to your main boot menu. As you can see there are a number of useful option to the GRUB2 sleep command. Here is the formal syntax for the sleep command:
