How do I change the default kernel in GRUB that is loaded at startup?

Solution Verified - Updated -

Issue

  • The kernel booted by default (using GRUB) is different from the one you would like to be automatically selected on startup. How do I change the default kernel in GRUB that is loaded at startup?

Environment

  • Red Hat Enterprise Linux 4
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

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