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28 Oct 2014 Change default grub startup in CentOS 7

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This post describes how to change the default startup choice while booting up CentOS 7.

Edit the file /etc/default/grub

Change the line
GRUB_DEFAULT=saved
to
GRUB_DEFAULT="Windows 7 (loader) (on /dev/sda1)"

The value to add is determined by looking at the menuentry lines in /boot/grub2/grub.cfg
Choose the menuentry that you would like to be default.

To make this change active run the command
# grub2-mkconfig -o /boot/grub2/grub.cfg

You will see this change the next time you reboot.

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