koehr.ing/content/til/2022-03-22.md

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{ .title = "There is a file system for EFI vars now", .date = @date("2022-03-22T00:00:00"), .author = "koehr", .draft = false, .layout = "til.html", .description = "", .tags = [], .custom = { .source = "https://www.kernel.org/doc/html/latest/filesystems/efivarfs.html" }, }

On kernel updates I saw a recurring "EFI variables are not supported on this system", so I investigated and learned that the new EFI variables are provided via a file system that needs to be mounted first:

mount -t efivarfs efivarfs /sys/firmware/efi/efivars