How to Change the Boot Sequence of Oracle Linux 7

How to Change the Boot Sequence of Oracle Linux 7

Applies to:

            Oracle Enterprise Linux – Version: 7

Description:

After successful installation of Oracle Linux 7, when I restart the Linux I should select the second option from boot sequence within 3 second to start up the Oracle Linux.

Solution:

            To change the boot sequence in Oracle Linux 7 follow the simple steps:

           

GRUB2 count the menu entries in the configuration file starting at 0 for the first entry.

To display the menu entries that are defined in the configuration file:

[root@khi]# cd /boot/grub2

[root@khi grub2]# grep '^menuentry' /boot/grub2/grub.cfg

menuentry 'Oracle Linux Server (4.1.12-61.1.18.el7uek.x86_64 with Unbreakable Enterprise Kernel) 7.3' --class oracle --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-4.1.12-61.1.18.el7uek.x86_64-advanced-8898f753-92f7-4919-9b33-a389fbeceae9' {

menuentry 'Oracle Linux Server (3.10.0-514.el7.x86_64 with Linux) 7.3' --class oracle --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-3.10.0-514.el7.x86_64-advanced-8898f753-92f7-4919-9b33-a389fbeceae9' {

menuentry 'Oracle Linux Server (0-rescue-6cd2d0dcb059426f838f676d4963ff2d with Linux) 7.3' --class oracle --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-0-rescue-6cd2d0dcb059426f838f676d4963ff2d-advanced-8898f753-92f7-4919-9b33-a389fbeceae9' {

I need to boot Oracle Linux from second menuentry, to set the second menuentry for default boot execute the following command:

[root@khi grub2]# grub2-set-default 1

You must run the grub2-mkconfig command to re-generate the /boot/grub2/grub.cfg file:

[root@khi grub2]# grub2-mkconfig -o /boot/grub2/grub.cfg

Your comments, especially which will help us improve the functionality, will be greatly appreciatedJ