Top all-time · #106
Jeff Geerling
Personal blog · jeffgeerling.com · on HN as geerlingguyhardwareprogramming
Jeff Geerling's personal blog at jeffgeerling.com covers hardware and programming. Since 2016, 346 different Hacker News readers have linked it 985 times, most often “I'm booting my Raspberry Pi 4 from a USB SSD”. It is still writing: the last post was on 2026-10-30, and you can follow it by feed.
Rarely recommended · 2 of 40 sampled comments recommend it?
Why HN links it
HN readers link Jeff Geerling's blog for Raspberry Pi hardware, storage and boot tests, and detailed teardowns and reviews of home-lab, KVM, NAS and AI-cluster projects.
- Recommended for · 2 comments
- Called "great and very detailed write ups"; one commenter says to consult the SD card performance post.
Summarised by Claude from a sample of 40 HN comments that link here. Each comment is marked recommending, critical or neutral (citing without judging); how this works.
Most-linked posts?
- I'm booting my Raspberry Pi 4 from a USB SSD7 people · 8 mentions · first linked 2020-06-09
- The Raspberry Pi Compute Module 4 Review6 people · 10 mentions · first linked 2020-10-19
- I clustered four Framework Mainboards to test LLMs6 people · 6 mentions · first linked 2025-08-07
- /blog6 people · 6 mentions · first linked 2021-07-17
- I won't connect my dishwasher to your cloud5 people · 5 mentions · first linked 2025-03-24
- External GPUs and the Raspberry Pi Compute Module 45 people · 5 mentions · first linked 2020-10-27
- /blog/2025/15-tb-vram-on-mac-studio-rdma-over-thunderbolt-5/5 people · 5 mentions · first linked 2026-03-27
- Mini NASes marry NVMe to Intel's efficient chip5 people · 5 mentions · first linked 2025-07-04
- Use an External GPU on Raspberry Pi 5 for 4K Gaming5 people · 5 mentions · first linked 2024-10-08
- Dell's Response to the MacBook Neo5 people · 5 mentions · first linked 2026-08-07
What Hacker News says?
Hah, just came across his blog while trying to debug an issue I'm having: https://www.jeffgeerling.com/blog/2018/fixing-503-service-un...
Comment linking /blog/2018/fixing-503-service-unavailable-and-endpoints-not-available-traefik-ingress-kubernetes
on “Raspberry Pi 400 Desktop PC”Submitted Self-hosting your own media considered harmful according to YouTube as a story · 1634 points
HN discussionI was hopping they would just use the compute module[1] and you could replace/upgrade or even use it in another project. In the teardown you can see there is only one board. [2] I would have also though it would cost less but I guess integrating it directly is even cheaper. [1] https://www.raspberrypi.org/blog/raspberry-pi-compute-module... [2] https://www.jeffgeerling.com/blog/2020/raspberry-pi-400-tear...
Comment linking /blog/2020/raspberry-pi-400-teardown-and-review
on “Raspberry Pi 400 Desktop PC”Submitted I won't connect my dishwasher to your cloud as a story · 1012 points
HN discussionI was lucky to get a pre-release version to test, and I decided to tear it down before I started trying it out. I posted this blog post with detailed pictures of the insides, and some more details and performance benchmarks: https://www.jeffgeerling.com/blog/2020/raspberry-pi-400-tear... There are also a couple videos linked in the post, if you're more visually-inclined. Fun fact: the Pi 400 (and Compute Module 4) b…
Comment linking /blog/2020/raspberry-pi-400-teardown-and-review
on “Raspberry Pi 400 Desktop PC”Submitted 1.5 TB of VRAM on Mac Studio – RDMA over Thunderbolt 5 as a story · 609 points
HN discussionEh... that was not my experience: https://www.jeffgeerling.com/blog/2020/i-replaced-my-macbook... (Unless you're speaking almost entirely of webapps, which mostly run fine even on the measly 1.5 GHz 4-core Pi ARM processor.)
Comment linking /blog/2020/i-replaced-my-macbook-pro-raspberry-pi-4-8gb-day
on “Apple announces it will switch to its own processors for future Macs”Submitted M4 Mac mini's efficiency as a story · 568 points
HN discussionI found the same problem when I tried running off Pi OS 64-bit for a day—almost every app that _did_ have a Linux binary available was only able to run under x86_64, not on arm64... More here: https://www.jeffgeerling.com/blog/2020/i-replaced-my-macbook... Zoom, Bluejeans, Dropbox, pretty much all the popular apps I used where I could find a Linux version for my Dell laptop, I couldn't find a way (though got close a…
Comment linking /blog/2020/i-replaced-my-macbook-pro-raspberry-pi-4-8gb-day
on “Apple announces it will switch to its own processors for future Macs”Submitted The Raspberry Pi 4 needs a fan as a story · 566 points
HN discussionI've been using OBS for a couple months for live streams on YouTube (see https://www.jeffgeerling.com/blog/2020/ansible-101-jeff-geer... ), and I have had rock-solid reliability, using an external mic interface, an external camera (displayed PIP), and sharing one of two displays during some instructional sessions. One thing to keep in mind, though—unless you have a dedicated video card, and it's supported by OBS (th…
Comment linking /blog/2020/ansible-101-jeff-geerling-youtube-streaming-series
on “OBS Studio: Open-source software for video recording and live streaming”Submitted I returned my 2016 MacBook Pro with Touch Bar as a story · 559 points
HN discussionI know I've been getting a number of questions around livestreaming for churches lately (since I used to do that a lot more in the past), and I've been gathering my thoughts in a blog post here: https://www.jeffgeerling.com/blog/2020/how-livestream-masses... It depends mainly on the budget, but with Easter coming up (probably _the_ major day in many (if not most) Christian churches), it seems many groups are scrambl…
Comment linking /blog/2020/how-livestream-masses-or-other-liturgies-on-youtube
on “OBS Studio: Open-source software for video recording and live streaming”Submitted They stole my voice with AI as a story · 524 points
HN discussionI wrote about it a bit earlier this year: https://www.jeffgeerling.com/blog/2020/how-i-livestream-obs-... But I'm considering doing a little more in the realm of 'how its made' type videos, because you can do most of the things 'professional' video producers do on a budget, depending on how many nice things you want to do in a video.
Comment linking /blog/2020/how-i-livestream-obs-sony-a6000-and-cam-link
on “I Just Hit $100k/year On GitHub Sponsors”Submitted Monitoring my home's air quality with AirGradient's DIY sensor as a story · 515 points
HN discussion> Here's the problem (and it's not insurmountable): right now, there's no easy path towards sustainable content production when the audience for the content is 100x smaller, and the number of patrons/sponsors remains proportionally the same. https://www.jeffgeerling.com/blog/2025/self-hosting-your-own...
Comment linking /blog/2025/self-hosting-your-own-media-considered-harmful-updated
on “Yt-dlp: Upcoming new requirements for YouTube downloads”Submitted Starlink review, four months in as a story · 509 points
HN discussionIf you use an OS that handles high DPI very well, and where 98% of all apps handle it just as well (including resolution scaling), it is an absolute joy to my eyes to be able to use 4K at the same effective resolution (so basically 1080p, but double the resolution, double the sharpness). Every time I use a 'non-retina' type of display (like an old laptop I use for testing or my 19" 1080p monitor), it feels like I'm…
Comment linking /blog/2020/i-replaced-my-macbook-pro-raspberry-pi-4-8gb-day
on “Time to Upgrade Your Monitor”Submitted UASP makes Raspberry Pi 4 disk IO 50% faster as a story · 489 points
HN discussionJeff Geerling just did a video with a cluster of 4 Framework Desktop main boards. He put a decent amount of work into Exo and concluded it’s a VC Rugpull… abandoned as soon as it won some attention. He also explored several other open source AI scale out libraries, and reported that they’re generally way less mature than tooling for traditional scientific cluster computing. https://www.jeffgeerling.com/blog/2025/i-c…
Comment linking /blog/2025/i-clustered-four-framework-mainboards-test-huge-llms
on “I want everything local – Building my offline AI workspace”Submitted I bought the cheapest EV, a used Nissan Leaf as a story · 473 points
HN discussionJeff Geerling blogged about his demo setup - https://www.jeffgeerling.com/blog/2025/15-tb-vram-on-mac-stu... Uses Exo - https://exolabs.net You can do it with other software, that's just one of the quick-and-easy setups if you've got a spare 40-60k for studios sitting around
Comment linking /blog/2025/15-tb-vram-on-mac-studio-rdma-over-thunderbolt-5/
on “Muse Spark Open”Submitted Everything I know about Kubernetes I learned from a cluster of Raspberry Pis as a story · 470 points
HN discussionI've used this for years when passing large files between systems in weird network environments, it's almost always flawless. For some more exotic testing, I was able to run my own magic wormhole relay[1], which let me tweak some things for faster/more reliable huge file copies. I still hate how often Google Drive will fall over when you throw a 10s-of-GB file at it. [1] https://www.jeffgeerling.com/blog/2023/my-own…
Comment linking /blog/2023/my-own-magic-wormhole-relay-zippier-transfers
on “Magic Wormhole: get things from one computer to another, safely”Submitted I regret building this $3000 Pi AI cluster as a story · 468 points
HN discussion> My macbook's bluetooth will not connect to my earbuds, but only when zoom is running. that sounds like something related to this bug : https://www.jeffgeerling.com/blog/2018/airpods-get-stuck-low...
Comment linking /blog/2018/airpods-get-stuck-low-quality-16-khz-audio-mode-when-starting-vm
on “How the Zoom macOS installer does its job without you clicking ‘install’”Submitted Mini NASes marry NVMe to Intel's efficient chip as a story · 454 points
HN discussionThere are a number of resources that may be useful for your curriculum for this project listed in "Is there a program like codeacademy but for learning sysadmin?" https://news.ycombinator.com/item?id=19469266 : > [ http://www.opsschool.org/ , https://github.com/kahun/awesome-sysadmin/blob/master/README... , https://github.com/stack72/ops-books , https://landing.google.com/sre/books/ , https://response.pagerduty.com/…
Comment linking /blog/2018/testing-your-ansible-roles-molecule
on “Show HN: Linux sysadmin course, eight years on”Submitted The ASUS Tinker Board is a compelling upgrade from a Raspberry Pi 3 B+ as a story · 441 points
HN discussion
