
From the EFI Tools package in the Linux user-space, it's now possible to read and manipulate the UEFI signatures database via the new efi-readvar and efi-updatevar commands. Aside from needing efitools 1.4, the EFIVARFS file-system is also needed, which was only introduced in the Linux 3.8 kernel.
More details on efitools 1.4 can be found in this blog post by James Bottomley.
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