Is it possible to erase the UEFI/BIOS using dd or rm -rf on Linux ? ( yt3.ggpht.com )

mvirts , 23 days ago

Pretty sure you can brick your system real quick using efivarfs

https://docs.kernel.org/filesystems/efivarfs.html

some systems dont let you write but some do.

Theres a similar system i was messing with to read and write the firmware code... reading through this may be informative.

efivars should let your change any bios/uefi settings if thats what youre looking for.

possiblylinux127 , 23 days ago

Modern versions of Linux don't let you erase it so easily

zaknenou OP , 23 days ago

thank you! I think this is what needed to explore
It is not my level to edit these things, I'm just Linux newbie exploring the possibilities.

But I still can't wrap my head over dd not being able to wipe a storage device out, despite being described as a "low level tool that can write zeroes to targets" in the discussion I viewed online.

BCsven , 22 days ago

The bios isn't like a regular storage device presented to the kernel for mounting.

bloodfart , 21 days ago

Dd can’t overwrite a burned cdr either. If the thing you wanna mess with is read only there’s no way to use it as a dd of.

zaknenou OP , 20 days ago

but CD-R aren't rewrite_able because of their physical property not because protected

bloodfart , 20 days ago

that's true, but in both cases the ability to write data simply isn't there.