====== Disabling Boot splashscreen ======
This option is particularly useful to see the bootsequence or to enter the password of an encrypted harddrive during the boot process.
Edit the /etc/default/grub file:
<code>
sudo vi /etc/dafault/grub
</code>

And change the value "quiet splash" of GRUB_CMDLINE_LINUX_DEFAULT with "".

if you use vi use the two following commands:
<code>
:%s/GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"/GRUB_CMDLINE_LINUX_DEFAULT=""/
:wq
</code>

After that update grub:
<code>
update-grub2
</code>