How to remove existing rescue kernel and how to prevent them from being created after new kernel updates.

Solution Verified - Updated -

Issue

  • The rescue kernel is taking up space in /boot.
  • A rescue kernel entry is created for every Kernel installation.
  • A rescue kernel is marked as default after a Kernel installation.
  • /boot contains multiple initramfs-0-rescue and/or vmlinuz-0-rescue files
  • GRUB boot menu shows multiple 0-rescue entries

Environment

  • Red Hat Enterprise Linux 9
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 7

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