Make Ubuntu boot into run Level 3

Edit /etc/default/grub with your favorite editor,

sudo vim  /etc/default/grub
Find this line:

GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash”
Change it to:

GRUB_CMDLINE_LINUX_DEFAULT=”text”

Update Grub:
sudo update-grub

Done, Next time you boot it will be into run level 3