kernel boot parameter

[diskrod]

I recently upgraded to a HP laptop and my profile has changed. I'm a novice when it comes to Linux Lite but I'm trying to learn new stuff.  I'm confused about "add the kernel boot parameter" as shown below.  How do I add it? I'm able to get into the terminal and enter the first sudo line but after that I'm lost. Any help is appreciated. I have a slow boot time of six minutes which I'm trying to change with the following:

• sudo nano /etc/default/grub
  

Then add the kernel boot parameter: video=SVIDEO-1:d, so it will look like this: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash video=SVIDEO-1:d"

• sudo update-grub
  
• sudo reboot