Customize, Repair & Change GRUB in Linux | Fix GRUB2 Errors in RHEL 7/8

Customise/Repair or Change GRUB2 in Redhat Enterprise Linux 7/8
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/boot/grub2/grub.cfg ====) Auto generated GRUB Configuration File

/etc/grub.d ===) GRUB Template Directory which contains other grub template files.

/etc/default/grub ===) GRUB Settings File

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To regenerate GRUB Configruation File with changed settings from /etc/default/grub use below command

grub2-mkconfig -o /boot/grub2/grub.cfg
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