Inferno operating system
Hacker ApprovedShares rank 43 of 87 operating systems by recommenders
Free operating system from the Plan 9 lineage, praised for its everything-is-a-file design and typed shell, but it was never fully completed and has bit-rotted.
Free operating system from the Plan 9 lineage, praised for its everything-is-a-file design and typed shell, but it was never fully completed and has bit-rotted.
13 people gave an opinion
- recommend it
- 12
- criticize it
- 1
- approval share
- 92%
Recommended in 8 of 13 months
- November 2025: recommended
- December 2025: recommended
- January 2026: not recommended
- February 2026: recommended
- March 2026: recommended
- April 2026: recommended
- May 2026: recommended
- June 2026: not recommended
- July 2026: recommended
- August 2026: recommended
- September 2026: not recommended
- October 2026: not recommended
- November 2026: not recommended (month in progress)
Why it carries the badge
- 12 people recommend itNeeds 10 or more, met.
- 12 recommenders for every criticNeeds 2 to 1 or better, met.
- Recommended in 8 of 13 monthsNeeds 4 or more, 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
Plan 9 style everything-is-a-file design
“Plan 9 and inferno come pretty close to literally everything being a file”
Comment from 2 Apr 2026 in “ReactOS Shows Improved Stability and 64-Bit Support at Chemnitz Linux Days 2026” “Maybe inferno with proper namespaces AND in-kernel namespace support.”
Comment from 16 May 2026 in “A 0-click exploit chain for the Pixel 10” “Plan9/9front and Inferno obliterated it”
Comment from 3 May 2026 in “Lib0xc: A set of C standard library-adjacent APIs for safer systems programming” - Comment from 17 Jul 2026 in “Solod: Go can be a better C”
- Comment from 21 Nov 2025 in “The Lions Operating System”
Typed shell and type-system design
“Inferno is a really nice system with a lot of interesting reference stuff implemented like a typed shell”
Comment from 11 Nov 2025 in “Writing your own BEAM” “There are even type-system libraries to make it easy to implement (like Inferno).”
Comment from 19 Feb 2026 on Hacker News “there was still Inferno, with Limbo fixing Alef's design mistakes”
Comment from 4 Aug 2026 in “Plan 9 from Bell Labs, the little OS that could”
What people warn about
Each mark is one comment
Rushed and never fully completed
“Inferno was forced onto the Labs people by Lucent in an attempt to compete with Sun's Java and built in a year”
Comment from 11 Nov 2025 in “Writing your own BEAM” “Inferno was never fully completed and bit-rotted a bit but it still builds on systems with 32 bit support”
Comment from 11 Nov 2025 in “Writing your own BEAM”
Other operating systems people recommend
The four most recommended other operating systems, 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.
| Product | Recommend | Criticize | Approval | Months | Owned | Badge |
|---|---|---|---|---|---|---|
| Windows | 1,287 | 3,582 | 26% | 13 | 10 yrs192 owners | — |
| macOS | 1,041 | 1,928 | 35% | 12 | 11 yrs183 owners | — |
| Linux | 745 | 277 | 73% | 12 | 19 yrs116 owners | Approved |
| FreeBSD | 335 | 94 | 78% | 12 | 20 yrs69 owners | Approved |
| Inferno operating systemThis page | 12 | 1 | 92% | 8 | — | Approved |
What people said
19 of the 20 comments that mention it, newest first. Each links to the original comment.
“there was still Inferno, with Limbo fixing Alef's design mistakes”
“across UNIX, Plan 9 and Inferno”
“They seem to be making good progress, starting out from Trung Nguyễn's effort.”
“I think they've 100% nailed it once again.”
“throws away many nice things about Inferno and Limbo”
“far less exploits, and with no Kubernetes or Docker nonsense”
“Maybe inferno with proper namespaces AND in-kernel namespace support.”
“I preferred Inferno's GUI to plain old Rio/Acme etc.”
“Plan9/9front and Inferno obliterated it”
“the managed code thing had been done before with Inferno”
“something that should have been replaced by Inferno”
“Plan 9 and inferno come pretty close to literally everything being a file”
“There are even type-system libraries to make it easy to implement (like Inferno).”
“its authors did two other operating systems trying to make UNIX done right”
“it worked well enough to run on telephony equipment in prod”
“looking at Plan 9 and Inferno”
“Inferno was forced onto the Labs people by Lucent in an attempt to compete with Sun's Java and built in a year”
“Inferno is a really nice system with a lot of interesting reference stuff implemented like a typed shell”
“Inferno was never fully completed and bit-rotted a bit but it still builds on systems with 32 bit support”
Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.