Grub2/Installing - Community Help Wiki
When using the grub-install command, the boot information is updated and written to the designated drive, missing - but not corrupted or intentionally deleted - files are restored. Specifically the core.img, grubenv, and device.map are updated and missing modules restored. If missing, the grub folder will be recreated. The grub-install command does not generate a new GRUB 2 menu (grub.cfg).
Sat Mar 14 17:00:29 2026 - permalink -
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https://help.ubuntu.com/community/Grub2/Installing#Reinstalling_GRUB_2