Dr. Cuff
@forbiddenunix.com
retired unix whisperer and hpc apprentice
formerly big dot edu, etc.
🇬🇧 / 🇺🇸
formerly big dot edu, etc.
🇬🇧 / 🇺🇸
December 29, 2025 at 1:06 AM
Sure there is stress in life, but nothing is more stressful than watching an attempt to pull off The Full Puff, when there’s only enough time for the rough puff.
(Can’t watch!!)
#baking #soggybottoms
(Can’t watch!!)
#baking #soggybottoms
December 29, 2025 at 12:19 AM
Sure there is stress in life, but nothing is more stressful than watching an attempt to pull off The Full Puff, when there’s only enough time for the rough puff.
(Can’t watch!!)
#baking #soggybottoms
(Can’t watch!!)
#baking #soggybottoms
I’m shall be mostly live skeeting chapters of my “origin book” over the next year.
Thanks John!
I am inside you.
Thanks John!
I am inside you.
December 28, 2025 at 12:54 AM
I’m shall be mostly live skeeting chapters of my “origin book” over the next year.
Thanks John!
I am inside you.
Thanks John!
I am inside you.
The nog bottle is drained, and the sausage rolls are no longer with us.
We thank them both for their service.
We thank them both for their service.
December 28, 2025 at 12:07 AM
The nog bottle is drained, and the sausage rolls are no longer with us.
We thank them both for their service.
We thank them both for their service.
Make a Bond movie academic
Dr. No: An In-depth Longitudinal Study of Latent Success Criteria from a Cohort of 2,000 Cross validated Viva Results in Bioinformatics.
Dr. No: An In-depth Longitudinal Study of Latent Success Criteria from a Cohort of 2,000 Cross validated Viva Results in Bioinformatics.
December 26, 2025 at 5:48 PM
Make a Bond movie academic
Dr. No: An In-depth Longitudinal Study of Latent Success Criteria from a Cohort of 2,000 Cross validated Viva Results in Bioinformatics.
Dr. No: An In-depth Longitudinal Study of Latent Success Criteria from a Cohort of 2,000 Cross validated Viva Results in Bioinformatics.
Reposted by Dr. Cuff
Magic and Chroma are extremely happy right now. Happy Christmas to everyone.
Here’s our little #magicpuss wishing you all a very Merry Christmas!
Seen here holding on tight to his new favorite, and super tasty present from @spacekittyexpress.bsky.social!
He’s a big fan!
#cats #catsofbluesky
Seen here holding on tight to his new favorite, and super tasty present from @spacekittyexpress.bsky.social!
He’s a big fan!
#cats #catsofbluesky
December 25, 2025 at 6:05 PM
Magic and Chroma are extremely happy right now. Happy Christmas to everyone.
Real talk:
@micheleclamp.com: Cuff did you see it?
@forbiddenunix.com: nah, what?
@micheleclamp.com: the open houses?
@forbiddenunix.com: was it on the socials?
@micheleclamp.com: no it was on REDFIN!!!
(End)
@micheleclamp.com: Cuff did you see it?
@forbiddenunix.com: nah, what?
@micheleclamp.com: the open houses?
@forbiddenunix.com: was it on the socials?
@micheleclamp.com: no it was on REDFIN!!!
(End)
December 25, 2025 at 2:27 AM
Real talk:
@micheleclamp.com: Cuff did you see it?
@forbiddenunix.com: nah, what?
@micheleclamp.com: the open houses?
@forbiddenunix.com: was it on the socials?
@micheleclamp.com: no it was on REDFIN!!!
(End)
@micheleclamp.com: Cuff did you see it?
@forbiddenunix.com: nah, what?
@micheleclamp.com: the open houses?
@forbiddenunix.com: was it on the socials?
@micheleclamp.com: no it was on REDFIN!!!
(End)
The forbidden unix, posting about the lost unix.
Another Liam banger for the holidays. 👇
#unix #tape
Another Liam banger for the holidays. 👇
#unix #tape
UNIX V4 tape successfully recovered: First ever version of UNIX written in C is running again
www.theregister.com/2025/12/23/u...
Crucial early evolutionary step found, imaged, and ... amazingly ... works
<- by me on @theregister.com
www.theregister.com/2025/12/23/u...
Crucial early evolutionary step found, imaged, and ... amazingly ... works
<- by me on @theregister.com
UNIX V4 tape successfully recovered
: Crucial early evolutionary step found, imaged, and ... amazingly ... works
www.theregister.com
December 24, 2025 at 11:49 PM
more TB4 / TB5 rdma shenanigans. The kext isn't signed, never gets to the kext cache, or has been omitted. All the extracted rdma .dylibs point to this kext. Has anyone got the output from "kextstat | grep -I rdma" on a box with TB5 that could help me show it's loaded? That would be aces!
![jcuff@midnight kcache % sudo /usr/bin/kmutil load -p /System/Library/Extensions/AppleThunderboltRDMA.kext
Authenticating extension failed: Kext com.apple.driver.AppleThunderboltRDMA v0.0.1 in codeless kext bundle com.apple.driver.AppleThunderboltRDMA at /System/Library/Extensions/AppleThunderboltRDMA.kext:
Authenticating extension failed: Bad code signature
jcuff@midnight kcache %
jcuff@midnight kcache % ipsw kernel extract ./kernelcache.decompressed com.apple.driver.AppleThunderboltNHI
• Created com.apple.driver.AppleThunderboltNHI
jcuff@midnight kcache %
jcuff@midnight kcache %
jcuff@midnight kcache % ipsw kernel extract ./kernelcache.decompressed com.apple.driver.AppleThunderboltRDMA
Usage:
ipsw kernel extract <KERNELCACHE> <KEXT> [flags]
Aliases:
extract, e
Flags:
-a, --all Extract all KEXTs
-e, --arch string Which architecture to use for fat/universal MachO
-h, --help help for extract
--output string Directory to extract KEXTs to
Global Flags:
--color colorize output
--config string config file (default is $HOME/.config/ipsw/config.yaml)
--no-color disable colorize output
-V, --verbose verbose output
⨯ failed to parse KEXT com.apple.driver.AppleThunderboltRDMA: fileset does NOT contain com.apple.driver.AppleThunderboltRDMA](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:asud2ogk7zptaio5ounbsknc/bafkreieoiecsvealplk5qonjhz4zdms3fqajqe6hxa27wgnrrjvn66lela@jpeg)
December 24, 2025 at 9:13 PM
more TB4 / TB5 rdma shenanigans. The kext isn't signed, never gets to the kext cache, or has been omitted. All the extracted rdma .dylibs point to this kext. Has anyone got the output from "kextstat | grep -I rdma" on a box with TB5 that could help me show it's loaded? That would be aces!
Down, down deeper and down.
Coffin meet nail. Ohai nail! ‘ello coffin, what’s occurin’? Not much. Same ol’ same ol’ really.
Say, weren’t you a big deal back in the summer? Yeah. But that didn’t last, bit like my 18A fab, which is now pretty much not fab.
Not at all.
#hpc #ai #cloud
Coffin meet nail. Ohai nail! ‘ello coffin, what’s occurin’? Not much. Same ol’ same ol’ really.
Say, weren’t you a big deal back in the summer? Yeah. But that didn’t last, bit like my 18A fab, which is now pretty much not fab.
Not at all.
#hpc #ai #cloud
December 24, 2025 at 3:10 PM
Ever since we arrived in the USA, we’ve been huge supporters of the Bostoo Yook Yarters.
Our good friend @phylogenomics.bsky.social said that the Bostoo Yook Yarters were the team to support if you like the beep ball bloot.
#baseball #gosox
Our good friend @phylogenomics.bsky.social said that the Bostoo Yook Yarters were the team to support if you like the beep ball bloot.
#baseball #gosox
For anyone worried AI will replace all of us.
Courtesy of Gemini for the prompt “create an infographic of all the World Series winners since 1986”
I dare you to find 10 things that are right.
Courtesy of Gemini for the prompt “create an infographic of all the World Series winners since 1986”
I dare you to find 10 things that are right.
December 24, 2025 at 2:13 AM
Ever since we arrived in the USA, we’ve been huge supporters of the Bostoo Yook Yarters.
Our good friend @phylogenomics.bsky.social said that the Bostoo Yook Yarters were the team to support if you like the beep ball bloot.
#baseball #gosox
Our good friend @phylogenomics.bsky.social said that the Bostoo Yook Yarters were the team to support if you like the beep ball bloot.
#baseball #gosox
to save any of y'all trying the new @jeffgeerling.com super rdma jaccl magic and you only have the thunderbolt 4?
don't bother, you need thunderbolt 5.
however you can still use ring mode though, which as you can see isn't so shabby at 37.9 Gbit/s of old fashioned TCP over thunderbolt 4!
#hpc #ai
don't bother, you need thunderbolt 5.
however you can still use ring mode though, which as you can see isn't so shabby at 37.9 Gbit/s of old fashioned TCP over thunderbolt 4!
#hpc #ai
December 23, 2025 at 4:19 PM
to save any of y'all trying the new @jeffgeerling.com super rdma jaccl magic and you only have the thunderbolt 4?
don't bother, you need thunderbolt 5.
however you can still use ring mode though, which as you can see isn't so shabby at 37.9 Gbit/s of old fashioned TCP over thunderbolt 4!
#hpc #ai
don't bother, you need thunderbolt 5.
however you can still use ring mode though, which as you can see isn't so shabby at 37.9 Gbit/s of old fashioned TCP over thunderbolt 4!
#hpc #ai
December 22, 2025 at 1:00 AM
December 21, 2025 at 2:08 AM
Calling out the epic once in a lifetime go to holiday destinations of Garstang *and* Poulton-le-Fylde right on the box, and not a peep from the @yorkshiretea.bsky.social socials?
Priceless!
🇬🇧
Priceless!
🇬🇧
December 20, 2025 at 4:16 PM
Calling out the epic once in a lifetime go to holiday destinations of Garstang *and* Poulton-le-Fylde right on the box, and not a peep from the @yorkshiretea.bsky.social socials?
Priceless!
🇬🇧
Priceless!
🇬🇧
Mostly for @jefflayton.bsky.social and @micheleclamp.com. I think I’ve finally found out how they do the purple ones. Heh. 🤣
December 19, 2025 at 4:30 PM
Mostly for @jefflayton.bsky.social and @micheleclamp.com. I think I’ve finally found out how they do the purple ones. Heh. 🤣
Rather than contemptuous ridicule, events like these should be given awards. At a legit ceremony, with celebrities handing out little gold painted trophies and stuff.
Remote, unauthenticated and hooked into all the OBM and mngt switches?
Ding ding ding!
We have ourselves a world record winner!
Remote, unauthenticated and hooked into all the OBM and mngt switches?
Ding ding ding!
We have ourselves a world record winner!
Maximum-severity vuln lets unauthenticated attackers execute code on trusted infra management platform. www.theregister.com/2025/12/19/h...
HPE OneView RCE bug scores a perfect 10
: Maximum-severity vuln lets unauthenticated attackers execute code on trusted infra management platform
www.theregister.com
December 19, 2025 at 4:02 PM
Rather than contemptuous ridicule, events like these should be given awards. At a legit ceremony, with celebrities handing out little gold painted trophies and stuff.
Remote, unauthenticated and hooked into all the OBM and mngt switches?
Ding ding ding!
We have ourselves a world record winner!
Remote, unauthenticated and hooked into all the OBM and mngt switches?
Ding ding ding!
We have ourselves a world record winner!
As an washed up ex academic HPC manager, I am 100% in love with this. Epic.
High speed RDMA over the thunderbolts?
Yep, all the itches scratched. Well played as always Jeff.
#hpc #ai
bsky.app/profile/jeff...
High speed RDMA over the thunderbolts?
Yep, all the itches scratched. Well played as always Jeff.
#hpc #ai
bsky.app/profile/jeff...
For those who like watching: youtube.com/watch?v=x4_R...
Or reading: jeffgeerling.com/blog/2025/15...
Or reading: jeffgeerling.com/blog/2025/15...
Apple didn't have to go this hard...
YouTube video by Jeff Geerling
youtube.com
December 18, 2025 at 4:57 PM
As an washed up ex academic HPC manager, I am 100% in love with this. Epic.
High speed RDMA over the thunderbolts?
Yep, all the itches scratched. Well played as always Jeff.
#hpc #ai
bsky.app/profile/jeff...
High speed RDMA over the thunderbolts?
Yep, all the itches scratched. Well played as always Jeff.
#hpc #ai
bsky.app/profile/jeff...
Current joy, finding who to follow all of the @chromamagic.com tech people since I moved to my new nerd account months ago.
I should write a python for this, or something.
With apologies in advance to @bielleogy.bsky.social and @soniacuff.com
Computer is hard.
I should write a python for this, or something.
With apologies in advance to @bielleogy.bsky.social and @soniacuff.com
Computer is hard.
December 18, 2025 at 3:10 AM
Current joy, finding who to follow all of the @chromamagic.com tech people since I moved to my new nerd account months ago.
I should write a python for this, or something.
With apologies in advance to @bielleogy.bsky.social and @soniacuff.com
Computer is hard.
I should write a python for this, or something.
With apologies in advance to @bielleogy.bsky.social and @soniacuff.com
Computer is hard.
Those newspaper quizzes are about to get super wicked mean…
(and you thought the purple clues were hard)
🤣
(and you thought the purple clues were hard)
🤣
December 17, 2025 at 7:21 PM
Those newspaper quizzes are about to get super wicked mean…
(and you thought the purple clues were hard)
🤣
(and you thought the purple clues were hard)
🤣
Doug did a real tidy reality check, and quality deep dive job on this one.
Particularly love the slot machine analogy.
Excellent.
#hpc #cloud #ai
Particularly love the slot machine analogy.
Excellent.
#hpc #cloud #ai
What started as a few paragraphs to help explain AI to a friend grew into this long article (with reference links). If you have not been watching AI and LLM progress closely, like I have, you may find this background primer helpful.
www.hpcwire.com/2025/12/16/a...
www.hpcwire.com/2025/12/16/a...
A (Mostly) Non-Technical AI Primer - HPCwire
I have studied and watched artificial intelligence grow over the last forty years. Like many, back in 1968, I was inspired by HAL 9000 in Stanley Kubrick’s 2001: A Space Odyssey. The question on my mi...
www.hpcwire.com
December 17, 2025 at 3:42 PM
Is anyone old enough to remember the olden times when NVIDIA bought their first HPC scheduler through the Bright Computing acquisition?
Youngsters might remember Run:AI also. But sure why not go buy yet another one, just to make triple sure. 👍
ALL THE SCHEDULE ARE BELONG TO US!
#hpc #cloud #ai
Youngsters might remember Run:AI also. But sure why not go buy yet another one, just to make triple sure. 👍
ALL THE SCHEDULE ARE BELONG TO US!
#hpc #cloud #ai
December 17, 2025 at 3:07 PM
All,
Please take this as the absolute final word on the subject. No further discussion required.
⚠️ There is well written, sensible actual science in this article!
#hpc #cloud #ai
Please take this as the absolute final word on the subject. No further discussion required.
⚠️ There is well written, sensible actual science in this article!
#hpc #cloud #ai
Fascinating piece about the manifold problems with data centers in space: taranis.ie/datacenters-...
It's not just the heat problems, but it doesn't appear to make sense on any dimension… complexity, size, reliability, cost, anything.
It's not just the heat problems, but it doesn't appear to make sense on any dimension… complexity, size, reliability, cost, anything.
Datacenters in space are a terrible, horrible, no good idea.
There is a rush for AI companies to team up with space launch/satellite companies to build datacenters in space. TL;DR: It's not going to work.
taranis.ie
December 17, 2025 at 3:02 PM
Required basic science chapter reading for all of the “yay! let’s do the #gou and the #hpc in space!” drama that’s currently being bounced around…
A H200 card is not a datacenter, Mr Simpson.
#cloud #space #heat #datacenter
www.nasa.gov/smallsat-ins...
A H200 card is not a datacenter, Mr Simpson.
#cloud #space #heat #datacenter
www.nasa.gov/smallsat-ins...
7.0 Thermal Control - NASA
The heat exchange depends on several factors listed below. Solar absorptivity and infrared (IR) emissivity are surface optical properties referenced below and
www.nasa.gov
December 13, 2025 at 4:54 PM
Required basic science chapter reading for all of the “yay! let’s do the #gou and the #hpc in space!” drama that’s currently being bounced around…
A H200 card is not a datacenter, Mr Simpson.
#cloud #space #heat #datacenter
www.nasa.gov/smallsat-ins...
A H200 card is not a datacenter, Mr Simpson.
#cloud #space #heat #datacenter
www.nasa.gov/smallsat-ins...