Hacker ApprovedDepartments

LearnixOS

The most recommended of 3 online books

Recommended as a hands-on, low-level walkthrough for building an operating system in Rust, detailed enough to reimplement; critics note typos and inconsistencies in the text.

Recommended as a hands-on, low-level walkthrough for building an operating system in Rust, detailed enough to reimplement; critics note typos and inconsistencies in the text.

16 people gave an opinion

recommend it
10
criticize it
6
approval share
63%
Each figure is one person. RecommendsCriticizes

Recommended in 1 of 13 months

  1. November 2025: not recommended
  2. December 2025: recommended
  3. January 2026: not recommended
  4. February 2026: not recommended
  5. March 2026: not recommended
  6. April 2026: not recommended
  7. May 2026: not recommended
  8. June 2026: not recommended
  9. July 2026: not recommended
  10. August 2026: not recommended
  11. September 2026: not recommended
  12. October 2026: not recommended
  13. November 2026: not recommended (month in progress)

Why it doesn’t carry the badge

  • 10 people recommend itNeeds 10 or more, met.
  • 1.6 recommenders for every criticNeeds 2 to 1 or better, not met.
  • Recommended in 1 of 13 monthsNeeds 4 or more, not met.

The same three rules apply to every product, and the badge can’t be bought. How the badge works

What people say about it

The reasons people give, with the number of comments that give each one. Open a reason to read what they said.

Why people recommend it

Each mark is one comment

  • Low-level detail without magic libraries

    “Avoiding to use „magic“ libraries which abstract away a lot of the intricacies the lower levels is helping with the understanding.”

    Comment from 26 Dec 2025 in “LearnixOS”

    “I think it's really cool that they're using bare-metal Rust for this.”

    Comment from 26 Dec 2025 in “LearnixOS”
  • Clear Rust-based explanations

    “I think it's really cool that they're using bare-metal Rust for this.”

    Comment from 26 Dec 2025 in “LearnixOS”

    “I've found the Rust-y explanations well worth the read!”

    Comment from 26 Dec 2025 in “LearnixOS”
  • Written by a real, honest author

    “I'm just glad to see this was written by an actual person.”

    Comment from 27 Dec 2025 in “LearnixOS”

    “The author didn't make it up”

    Comment from 26 Dec 2025 in “LearnixOS”

What people warn about

Each mark is one comment

  • Typos and inconsistencies in text

    “There are several small inconsistencies in the intro text”

    Comment from 26 Dec 2025 in “LearnixOS”

    “the many typos are annoying and distracting”

    Comment from 26 Dec 2025 in “LearnixOS”

Other online books people recommend

The two most recommended other online books, with the same counts for each, so you can compare like for like. The tick on each bar marks the 2 to 1 line the badge needs.

LearnixOS compared with 2 alternatives
ProductRecommendCriticizeApprovalMonthsOwnedBadge
LearnixOSThis page10663%1——
Quantum Countryby Andy Matuschak and Michael Nielsen50100%2——
Data Engineering Bookby datascale-ai4267%1——
See all 3 online books, ranked

What people said

All 16 comments that mention it, newest first. Each links to the original comment.

“focusing on BIOS bootloaders and cylinders/heads/sectors that have been a lie for a very long time over UEFI & NVMe is just a weird choice”

CriticizesComment from 2 Jan 2026 in “LearnixOS”

“I'm just glad to see this was written by an actual person.”

RecommendsComment from 27 Dec 2025 in “LearnixOS”

“I am all in favour of such projects”

RecommendsComment from 27 Dec 2025 in “LearnixOS”

“it's got a lot of complex legacy baggage that's an unnecessary cognitive burden for beginners”

CriticizesComment from 27 Dec 2025 in “LearnixOS”

“I've found the Rust-y explanations well worth the read!”

RecommendsComment from 26 Dec 2025 in “LearnixOS”

“I think that it is very important, and can be beneficial to people that come from other languages”

RecommendsComment from 26 Dec 2025 in “LearnixOS”

“The author didn't make it up”

RecommendsComment from 26 Dec 2025 in “LearnixOS”

“as primer, it's pretty good as it is”

RecommendsComment from 26 Dec 2025 in “LearnixOS”

“Avoiding to use „magic“ libraries which abstract away a lot of the intricacies the lower levels is helping with the understanding.”

RecommendsComment from 26 Dec 2025 in “LearnixOS”

“Opening with a made-up quote (that is very simple to Google, which quickly confirms its apocryphal nature)”

CriticizesComment from 26 Dec 2025 in “LearnixOS”

“There are several small inconsistencies in the intro text”

CriticizesComment from 26 Dec 2025 in “LearnixOS”

“an excellent writeup. It's detailed enough to implement in any programming language.”

MixedComment from 26 Dec 2025 in “LearnixOS”

“I think it's really cool that they're using bare-metal Rust for this.”

RecommendsComment from 26 Dec 2025 in “LearnixOS”

“the many typos are annoying and distracting”

CriticizesComment from 26 Dec 2025 in “LearnixOS”

“dedicates at least as much time to discussing the eccentricities of the underlying Rust implementation”

CriticizesComment from 26 Dec 2025 in “LearnixOS”

“I like the idea of the project!”

RecommendsComment from 26 Dec 2025 in “LearnixOS”

Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.