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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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Overview: How UEFI Secure Boot Works in Linux (tiffybelle.vivaldi.net)

submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]

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Been down the rabbit hole lately of UEFI Secure Boot issues, and decided to write an overview of how it works out-of-the-box in the excellent Debian-based Linux Mint LMDE 6.

Have mostly been researching this stuff as I was looking to replace GRUB entirely with systemd-boot on one of my systems. Will likely write a follow-up piece documenting that journey if I think it'd be interesting to some nerds out there.

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[–] cdombroski 2 points 1 year ago

although if one wants they can actually take full control of the Secure Boot process by replacing the Platform Key (PK) with their own.

Fun fact, actually replacing the platform key will often end up with the motherboard not being usable until you do a firmware install or nvram clear. This is because various modules (most relevantly GPUs) on the motherboard have their own signed firmware that's loaded at boot and if you replace the platform key they can't be loaded anymore as they don't have a valid signature. See: https://github.com/Foxboron/sbctl/wiki/FAQ#option-rom