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How to select which operating system starts first on a dual-boot installation (Windows7 and Ubuntu 12.04)

Zanna
  • 72,312
Dimitris
  • 23

2 Answers2

1

Edit /etc/default/grub, in terminal...

  • gksudo gedit /etc/default/grub

and edit/add these two parameters near the top of the file...

GRUB_DEFAULT=saved     <--- this line requires an edit
GRUB_SAVEDEFAULT=true  <--- this line needs to be added

...so that GRUB will remember your last selected OS as the default OS.

Then, in terminal...

  • sudo update-grub
heynnema
  • 73,649
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I am assuming you are using Grub2 to boot. More details can be found at https://help.ubuntu.com/community/Grub2/Setup#Configuring_GRUB_2.

  1. Boot your computer; when Grub appears, tap a key to prevent loading the default OS
  2. Look at the list of available options for booting; take note of the line number of the OS you want to boot by default; line numbers start at 0
  3. Boot into the OS that manages Grub; I am going to guess this would be Ubuntu
  4. In a terminal, open /etc/default/grub with sudo -H gedit /etc/default/grub (or other text editor)
  5. Look for the line that starts with either "GRUB_DEFAULT=" or "#GRUB_DEFAULT="; if the latter, remove "#"
  6. Replace whatever is after "=" with the line number of the OS you want to boot by default
  7. Save
  8. In a terminal, use sudo update-grub
Andrew Shum
  • 549