Dr. Cuff
@forbiddenunix.com
retired unix whisperer and hpc apprentice
formerly big dot edu, etc.
🇬🇧 / 🇺🇸
formerly big dot edu, etc.
🇬🇧 / 🇺🇸
Scientific proof that the fastest route from Shrewsbury Massachusetts, to Shrewsbury Massachusetts is always via Pittsburgh Pennsylvania.
For @bielleogy.bsky.social
For @bielleogy.bsky.social
January 11, 2026 at 11:13 PM
Scientific proof that the fastest route from Shrewsbury Massachusetts, to Shrewsbury Massachusetts is always via Pittsburgh Pennsylvania.
For @bielleogy.bsky.social
For @bielleogy.bsky.social
When I’m not tinkering with unnatural acts of HPC, I dabble in the kind of cross over sound system meets shipping fiasco (channeling @alex.zenla.io)
Feel free to read the whole thread, it’s a doozey — also if anyone has any ideas we would appreciate it!
github.com/owntone/ownt...
Feel free to read the whole thread, it’s a doozey — also if anyone has any ideas we would appreciate it!
github.com/owntone/ownt...
Sonos Era not working over AirPlay (but Sonos Roam does) · Issue #1853 · owntone/owntone-server
I have a HW sound card on my Pi 5 (running Ubuntu 22) that is piping audio to Owntone (latest installed via apt repos) via a fifo named pipe, and for some reason I cannot get any sound from one of ...
github.com
January 11, 2026 at 10:44 PM
When I’m not tinkering with unnatural acts of HPC, I dabble in the kind of cross over sound system meets shipping fiasco (channeling @alex.zenla.io)
Feel free to read the whole thread, it’s a doozey — also if anyone has any ideas we would appreciate it!
github.com/owntone/ownt...
Feel free to read the whole thread, it’s a doozey — also if anyone has any ideas we would appreciate it!
github.com/owntone/ownt...
If anyone has Thunderbolt 5 on OSX I'd be interested to see what you see with this simple back to back two node setup.
For me I was moderately happy with what I got out of a TB4 wire. It's a bit like 2013 Infiniband for seventy bucks hehe.
#hpc
github.com/DrCuff/hpc/b...
For me I was moderately happy with what I got out of a TB4 wire. It's a bit like 2013 Infiniband for seventy bucks hehe.
#hpc
github.com/DrCuff/hpc/b...
github.com
January 11, 2026 at 4:47 PM
If anyone has Thunderbolt 5 on OSX I'd be interested to see what you see with this simple back to back two node setup.
For me I was moderately happy with what I got out of a TB4 wire. It's a bit like 2013 Infiniband for seventy bucks hehe.
#hpc
github.com/DrCuff/hpc/b...
For me I was moderately happy with what I got out of a TB4 wire. It's a bit like 2013 Infiniband for seventy bucks hehe.
#hpc
github.com/DrCuff/hpc/b...
This is wicked cool and useful.
I’m up to my eyeballs trying to convince spack to carry out an unnatural acts with alpine and musl. Caught in a system gmake definitely exists, but packages.yaml showdown which isn’t helped with an unrelated buggy gmake getenv() stdlib.h issue. Fun and games 🤣
#hpc
I’m up to my eyeballs trying to convince spack to carry out an unnatural acts with alpine and musl. Caught in a system gmake definitely exists, but packages.yaml showdown which isn’t helped with an unrelated buggy gmake getenv() stdlib.h issue. Fun and games 🤣
#hpc
New blog post: Using Spack on top of EESSI: A Proof of Concept
Can we convince Spack to reuse software installations available in EESSI to resolve required dependencies when installing QuantumESPRESSO?
www.eessi.io/docs/blog/20...
@spackpm.bsky.social
Can we convince Spack to reuse software installations available in EESSI to resolve required dependencies when installing QuantumESPRESSO?
www.eessi.io/docs/blog/20...
@spackpm.bsky.social
Using Spack on top of EESSI: A Proof of Concept - European Environment for Scientific Software Installations (EESSI)
www.eessi.io
January 11, 2026 at 3:42 PM
This is wicked cool and useful.
I’m up to my eyeballs trying to convince spack to carry out an unnatural acts with alpine and musl. Caught in a system gmake definitely exists, but packages.yaml showdown which isn’t helped with an unrelated buggy gmake getenv() stdlib.h issue. Fun and games 🤣
#hpc
I’m up to my eyeballs trying to convince spack to carry out an unnatural acts with alpine and musl. Caught in a system gmake definitely exists, but packages.yaml showdown which isn’t helped with an unrelated buggy gmake getenv() stdlib.h issue. Fun and games 🤣
#hpc
Neat new little SLURM plug-in is this from the folks over at @rackslab.io
github.com/rackslab/slu...
#hpc #ai #cloud
github.com/rackslab/slu...
#hpc #ai #cloud
GitHub - rackslab/slurm-quota: CPU/GPU time quotas for users & accounts in Slurm
CPU/GPU time quotas for users & accounts in Slurm. Contribute to rackslab/slurm-quota development by creating an account on GitHub.
github.com
January 8, 2026 at 11:48 AM
Neat new little SLURM plug-in is this from the folks over at @rackslab.io
github.com/rackslab/slu...
#hpc #ai #cloud
github.com/rackslab/slu...
#hpc #ai #cloud
Wicked psyched to see that #garmin expects we can (only if we live our best life, hashtag blessed, hashtag life goals, hashtag crushing it! etc) now get to live to over 300 years old!
Way to go!
#running #crushingit #hahahah #lifegoals
🤣
Way to go!
#running #crushingit #hahahah #lifegoals
🤣
January 1, 2026 at 4:17 PM
Wicked psyched to see that #garmin expects we can (only if we live our best life, hashtag blessed, hashtag life goals, hashtag crushing it! etc) now get to live to over 300 years old!
Way to go!
#running #crushingit #hahahah #lifegoals
🤣
Way to go!
#running #crushingit #hahahah #lifegoals
🤣
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!