GRUB

Dual Boot - Remember Last Choice

dual boot - How to get grub2 to remember last choice? - Ask Ubuntu - http://askubuntu.com/questions/148662/how-to-get-grub2-to-remember-last-choice

Ubuntu:

/etc/default/grub

# GRUB_DEFAULT=0
GRUB_DEFAULT=saved
GRUB_SAVEDEFAULT=true

# GRUB_TIMEOUT=0
GRUB_TIMEOUT=60

note the GRUB_SAVEDEFAULT line needs to be added

then run:

sudo update-grub

To force a default for next boot use:

# list menu options
awk -F\' '/menuentry / {print $2}' /boot/grub/grub.cfg

# specify default boot option
grub-set-default "some-boot-menu-option"

grub-set-default Ubuntu

grub-set-default 0

NOTE: tab auto complete also works with grub-set-default!!

GRUB Legacy

See GRUB Legacy