Question

Launch a new terminal.
a) Using SUDO edit the /etc/default/grub file
b) Modify the value GRUB_TIMEOUT to 30 and save the configuration.
c) Use # to comment out the Hidden display entry.
d) Type grub2-mkconfig –o /boot/grub2/grub.cfg and hit enter
e) Reboot the system. How long did you have to wait?
f) Press c to enter a command prompt.
g) At the grub> prompt type help and hit enter.
h) Type the command lspci and hit enter. What is being displayed?
i) Use a different command of your choosing. What was the command and what did it display?
j) Type reboot and enter to restart the system.
k) In what scenario would an organization want to modify the GRUB ?

We just need to answer the ones with the question marks after we have performed the operation..Sounds clear?

Answer 1

e) 30s, because you have set the time out value to be 30.

h) lspci can be thought of having two components ls & pci. ls = list, pci = all pci ports and devices.
    this means, lspci lists detailed information about all PCI buses and devices in the system

i) cat: Show the contents of a file or may be use, boot, to startup the system

k) GRUB is usually modified to speed up the boot process by removing logo at startup (by using quite/splash mode or maybe be changing the timeout.