Just run sudo dpkg-reconfigure grub-pc before rebooting: https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypass?WUwbDVmRWk5RCtJZ2IyNUU2SyJ9#Known_issues
Just run sudo dpkg-reconfigure grub-pc before rebooting: /wiki.ubuntu. com/SecurityTea m/KnowledgeBase /GRUB2SecureBoo tBypass? WUwbDVmRWk5RCtJ Z2IyNUU2SyJ9# Known_issues
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