Getting linux to boot from the correct os option

Code:

sudo nano /etc/default/grub

(nano could be replaced with gedit or xed or leafpad w.e you use)!

Code:

GRUB_DEFAULT=0

Edit 0 to 1 for the 2nd item in menu in advanced menu

save and reboot to test!
if it dont work do 2 instead thats the 3rd item! and so on! until it works!

more info found howtogeek.com/196655/how-to-configure-the-grub2-boot-loaders-settings