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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]

36 comments fedilink hide all child comments

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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[–] [email protected] 5 points 1 year ago (2 children)

Interesting. I guess this could be a method to allow actual full disk encryption? Unless there's a way to have grub encrypted too?

[–] [email protected] 8 points 1 year ago

What do you mean by that? TPM and Secure boot do not manage encryption, but rather authentication and key management aspects. You still need an unencrypted UEFI partition storing your EFI binaries. This partition is always readable by an attacker, however any changes to binaries will make booting fail. Also no secrets should be stored here.

[–] [email protected] 7 points 1 year ago* (last edited 11 months ago)

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