Encountering the ‘executing grub-install /dev/sda failed’ error when trying to install the GRUB bootloader can prevent your Linux system from booting properly.
This cryptic error message doesn’t provide much insight into what exactly went wrong. But with the right troubleshooting approach, you can get to the bottom of GRUB installation failures on both BIOS and UEFI systems.
In this comprehensive guide, we’ll walk through the various causes of the grub-install error, like incorrect target devices, unsupported filesystems, and insecure boot issues. Follow the step-by-step solutions to identify the failure reason and correct it so you can successfully install GRUB and get your Linux system booting again.
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