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How can I change default Operating System in start up boot menu?

asked 2012-06-16 05:44:25 -0500

sabi gravatar image

updated 2017-01-13 15:23:01 -0500

mattdm gravatar image

How can I change default Operating System in start up boot menu? It is Fedora 17 now and I want to set it on Win 7.

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hhlp gravatar imagehhlp ( 2012-06-16 11:28:41 -0500 )edit

Unfortunatly it did not work for me, after i've gone through the process of setting windows 7 to a default, after doing these commands, my fedora crashed and i couln't login onto desktop anymore :(. I get sendmain starting, hangs there and that's it, no splash sreen shows up, nothing! Any one can tell, if there is another way to fix the boot order, like a graphical interface? Thanks!

xcomb gravatar imagexcomb ( 2013-11-05 00:20:06 -0500 )edit

2 Answers

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answered 2012-06-18 09:36:07 -0500

Akshay gravatar image

updated 2012-06-18 09:37:07 -0500

In a terminal type:

grep menuentry /boot/grub2/grub.cfg

This will display all your grub entries

Highlight the entry you want to default to - for example Windows 7 (loader) (on /dev/sda1) Right click and choose copy


gedit /etc/default/grub

Change the entry



GRUB_DEFAULT="Windows 7 (loader) (on /dev/sda1)"

i.e. paste the entry you want (including the quotes)

Save, then type

grub2-mkconfig -o /boot/grub2/grub.cfg
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Seems like you are trying to run gedit as root. For gedit to work this way, use "gedit -s /etc/default/grub"

This disables the dbus check so it can be used as root.

LooseWire29710 gravatar imageLooseWire29710 ( 2012-12-28 16:26:09 -0500 )edit

when i try to save by command grub2-mkconfig -o /boot/grub2/grub.cfg.....i am getting no such file found.

Ajay gravatar imageAjay ( 2013-02-28 21:50:11 -0500 )edit

'gedit' isn't really the ideal command to be editing files as root, even if you can disable the dbus interface. Try a simple editor like nano, which has on-screen instructions.

wquine gravatar imagewquine ( 2013-08-06 20:38:01 -0500 )edit

Maybe you had add an extra space after the plus sign, just delete it and everything works fine.

salah gravatar imagesalah ( 2014-07-11 13:31:35 -0500 )edit

Thanks, saved my time

pal1 gravatar imagepal1 ( 2016-02-17 04:08:49 -0500 )edit

answered 2013-08-06 20:19:16 -0500

First Move to SuperUser


Then search the grub menu entries of your grub

grep menuentry /boot/grub2/grub.cfg

Now edit the grub config by an editor

vi /etc/default/grub

Change the timeout and the GRUB_DEFAULT=0 to GRUB_DEFAULT="Windows 7 (loader) (on /dev/sda1)" The "Windows 7 (loader) (on /dev/sda1)" thing is for Windows 7. You can find your text from the grep menuentry /boot/grub2/grub.cfg

Now save and close form text editor and type the command

grub2-mkconfig -o /boot/grub2/grub.cfg

You are all Done!!

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Other than the timeout, how does this differ from the existing answer? Why change the timeout, anyway?

randomuser gravatar imagerandomuser ( 2013-08-06 21:20:08 -0500 )edit

Didn't get to try this

pal1 gravatar imagepal1 ( 2016-02-17 04:09:21 -0500 )edit

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Asked: 2012-06-16 05:44:25 -0500

Seen: 123,714 times

Last updated: Nov 05 '13