Grub2 menu not showing during boot

Solution Verified - Updated -

Issue

  • Grub2 boot menu is not showing during system boot.
  • GRUB_TIMEOUT_STYLE is not defined or is set to GRUB_TIMEOUT_STYLE=menu in the file /etc/default/grub.

Environment

  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

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