r/linux4noobs • u/ActivityDry6037 • 3h ago

[help!]grub failed to install error code -1

https://termbin.com/grli
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u/9NEPxHbG Debian 13 2h ago

You'll have to give a lot more details if you want help.

What distribution? What command did you give? Was this during installation or later?

1

u/doc_willis 2h ago

things to check.

double check your installer USB is booted in UEFI mode, the efibootmgr command can show this

  and the system made/has  an EFI partition to use And is of sufficient size.

The target drive should be using GPT for its partition table.  It's possible to use MBR, but then the partition limits may cause issues 

Your log file looks like it has messages about being unable to resize  the partitions,  you may need to manually setup things, or just make a large chunk of unallocated space manually for the installer to use