Topic: grub

• GRUB 2 administration: /etc/default/grub, grub-mkconfig, grubby and the default entry

  GRUB 2 is configured indirectly: settings live in /etc/default/grub and are compiled into grub.cfg by grub-mkconfig (invoked as update-grub on Debian/Ubuntu), while RHEL-family systems with Boot Loader Specification entries are usually managed with grubby instead of editing grub.cfg by hand.

  methodology · en · reviewed · knowledge as of 2026-09-24

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