Step-by-step – CentOS 7 GRUB Change Default OS Guide

Customizing Boot Order

3. 3. Running GRUB Customizer

   Finally, Launch & Enjoy GRUB Customizer
   From Desktop Make Use of the Launcher:

   

   Or from Command Line with:

   grub-customizer

4. 4. Setting Up OSes Boot Order

   Finally, to Modify CentOS 7 Boot Entries Order
   Choose the “General settings” Tab & “Default entry”:

   

   Finally Save & Exit:

   

Congratulations, your CentOS 7 New GRUB Boot Order setup should be now nicely working!