jasoneckert 20 hours ago

The *nix world is full of dark-but-fun terminology. Daemons run the system. New files get 666 (before the umask takes away unnecessary permissions). Parents kill their children before killing themselves. And sometimes you have to kill zombies.

  • vhodges 18 hours ago

    From: https://devrant.com/rants/1101391/my-daily-unix-command-list...

    unzip; strip; touch; finger; mount; fsck; more; yes; unmount; sleep.

    • Uehreka 14 hours ago

      > unzip; strip; touch; finger; mount; fsck; more; yes; unmount; sleep.

      T E C H N O L O G I C

      T E C H N O L O G I C

    • oefrha 15 hours ago

      Except you shouldn’t fsck while mounted.

      • toast0 10 hours ago

        Works fine in FreeBSD/ufs :p

    • prepend 10 hours ago

      Tail/head

      It’s almost like these commands were all made by nerd teenage boys.

    • __MatrixMan__ 11 hours ago

      This is a weird thread to happen upon when my other monitor has variables named sexp.

  • arp242 7 hours ago

    From: https://www.unixprogram.com/churchofbsd/index.html

    One day I was at a restaurant explaining process control to one of my disciples. I was mentioning how we have to kill the children (child processes) if they become unresponsive. Or we can even set an alarm for the children to kill themselves. That the parent need to wait (wait3) and acknowledge that the child has died or else it will become a zombie.

    The look of horror the woman sitting across had was unforgettable. I tried to explain it was a computer software thing but it was too late, she fled terrified, probably to call the police or something. I didn't really want to stick around too long to find out.

  • _fat_santa 16 hours ago

    Almost feels like a right of passage when you inevitably google something like "kill self" (in reference to killing the current process) and get a popup telling you about suicide resources.

    • mort96 12 hours ago

      Or "kill orphaned children" and be put a list somewhere

    • ganjatech 15 hours ago

      Or indeed a rite of passage

    • jakjak123 12 hours ago

      "Kill orphaned child process"

  • js2 10 hours ago

    Zombies can't be killed for they are already dead; they can only be reaped, by waiting on them. (This is why init inherits orphans, so it may reap them when they eventually die.)

  • gberger 16 hours ago

    Sometimes you have to kill orphans too!

  • __MatrixMan__ 11 hours ago

    Zombies or orphans, depending on which side you want to play as today. Plenty of killing to be done on both.

  • paulnpace 12 hours ago

    Unics (from Multics).

dcminter 20 hours ago

> We also assume that this is the meaning behind the daemon.co.uk, host to many United Kingdom web sites

Not sure if it was the origin of the company name, but the domain was demon.co.uk not daemon. E.g. I had pretence.demon.co.uk with them for a few years.

https://en.m.wikipedia.org/wiki/Demon_Internet

  • pixelesque 20 hours ago

    Yeah, never heard of a 'daemon.co.uk' in the 90s, but likewise had a Demon account...

trelane 15 hours ago

"Warning: This paragraph is about science so, if this topic causes you undue alarm, please close your eyes until you've finished reading it."

Amazing.

lynguist 10 hours ago

I find the “a la mode” vs “au jus” discussion right under the daemon one very interesting!

I wasn’t familiar with both of these expressions but I looked it up and “a la mode” is an American culinary expression, meaning “served with ice cream”. And “au jus” is also an American culinary expression, meaning “gravy” or “broth”. Now, even though they are both derived from a French expression that is a prepositional phrase with à (meaning with), it does not matter any more when they were borrowed to English.

“A la mode” became a new adverbial expression meaning just that: “served with ice cream”. You can have pie a la mode = pie served with ice cream, but obviously not *pie with a la mode = pie with served with ice cream.

And “au jus” became a noun expression meaning “broth” or “gravy”. And you must say sandwich with au jus = sandwich with gravy and can’t say *sandwich au jus = sandwich gravy.

What is extremely interesting here is that it bothers the prescriptivist who wants language to be a certain way he feels it is supposed to be, also the author on that webpage.

  • amatecha 9 hours ago

    Yeah, I was hanging out with someone recently who kept using "au jus" like "sauce", i.e. "you could make that with an au jus" , "ooh yeah that would be so good with an au jus on the side!" or similar ...

  • BlueTemplar 8 hours ago

    I immediately ordered my daemon to cook me some pilipili au jus de cuniculus.

    Also, I think I will risk opening my eyes now.

  • selimthegrim 5 hours ago

    You can say sandwich au jus but it refers to the sandwich with gravy not the gravy

mmooss 3 hours ago

They rely too much on Professor Corbato's account:

Corbato confidently gives the reason but A) doesn't claim to have coined the term, and may not know what the coiner's thinking was; B) at the time may have had a different understanding than some other members of the group - it's not the sort of thing that people have a meeting about; and C) is writing about something that happened decades ago.

Corbato then cites Take Our Word's prior description - people who weren't present when the word was coined, and who openly say they have no idea: "This is so reminiscent of Maxwell's daemon watching his molecules that we can only assume that whoever dubbed these "system processes" had Maxwell's daemon in mind. Unfortunately, we have found no hard evidence to support this."

Then Take Our Word cites Corbato, creating a loop. The only evidence in that loop is Corbato's flawed (being human), prompted (by reading Take Our Word) memory of possibly limited knowledge from decades ago.

gcanyon 20 hours ago

Ha -- I read the title and said to myself, "gotta be Maxwell, right?" The jolt of pleasure I get from being right about things like this is unreasonable.

  • JKCalhoun 18 hours ago

    Yeah, author tries to throw us a curve ball at first with that koo-koo backronym.

JD557 a day ago

Unrelated to the word "daemon", but related to the article, I was a bit surprised by this assertion:

> Eventually, though, the theory of quantum mechanics showed why it wouldn't work.

I was familiar with the information theory arguments (the same presented in Wikipedia[1]). Is that why they mean here by "quantum mechanics" or is there another counterargument to Maxwell's daemon?

1: https://en.m.wikipedia.org/wiki/Maxwell's_demon#Criticism_an...

  • n4r9 a day ago

    I'm guessing that the daemon's ability to allow only fast molecules through the gate depends on knowing their position and velocity simultaneously?

    • eru 18 hours ago

      But the daemon doesn't need to know them all that precisely.

      • n4r9 14 hours ago

        I think you'd have to be pretty precise to know if it's heading towards a hole that's only just large enough for it.

        • eru 8 hours ago

          Why would you make the hole so small?

          The main requirement for the hole is that it's small enough that (with high enough probability) only at most one or a handful of molecules will make its way through.

          And that size is completely independent of the size of your molecules, and only depends on how many there are per unit volume. There's a lot of 'empty space' between molecules in a gas.

          • n4r9 36 minutes ago

            Good question. I was going off the linked article which states:

            > In the middle of the divider was a tiny gate, just large enough to admit one molecule of gas.

            Still, that's quite a small hole relatively speaking. So you'd have to be fairly precise about both position and velocity. Potentially more than is allowed by Plank's constant. I dunno though, this isn't one of the counterarguments in the Wikipedia page, so probably you're right.

    • BlueTemplar 9 hours ago

      Yes, exactly, and this is what allows quantification.

      http://www.av8n.com/physics/thermo/entropy-more.html#sec-pha...

      With 'entropy' being an obsolete term for (lack of) information, and

      > “classical thermodynamics” is a contradiction in terms.

      • Vecr 8 hours ago

        On the "information" part, I'm not sure that's correct, have you seen the papers that dispute the Bayesian versions of thermodynamics?

        I think practically though, even before you hit anything "quantum", the requirement that you physically interact with the system is what dooms you.

  • Vecr 14 hours ago

    It probably (if the calculations are right) is unable to actually do much of anything useful (because it's too complex to avoid being extremely correlated with the rest of the universe ("embedded")), and even if it could it wouldn't be better than a standard ASI in most real-world situations.

    That's assuming you aren't trying to claw back more energy than you lose, I'm pretty sure that's not possible to reliably do without crazy hypothetical physics.

magicalhippo 10 hours ago

I recall reading a mail exchange posted on some usenet group about, IIRC, some boss or similar higher-up being shocked to discover the UNIX systems they ran were full of demons, and as a devout christian wanted the sysadmin to put an end to that immediately. The sysadmin was repeatedly trying to explain that a daemon was not the same as a demon, without success.

Tried to find the post again, but no dice :(

  • tharkun__ 5 hours ago

    A real BOFH would've just complied with the boss' request and made sure all the daemons were killed and stayed dead.

etcd 21 hours ago

Always thought it was because it denotes a process that stays alive and so is like a little living demon in your computer.

modernerd 20 hours ago

Wonderfully written. “Warning: This paragraph is about science so, if this topic causes you undue alarm, please close your eyes until you've finished reading it.”

trash_cat 20 hours ago

"Disk And Executive MONitor" does sound kinda cool, though.

  • rubyfan 20 hours ago

    I’d guess someone backed into that acronym when asked “why do you call these things daemons?”

    • m463 13 hours ago

      Does Anyone Else Make Outrageous Names?

twobitshifter 19 hours ago

Do you pronounce it as demon or like Matt Damon?

  • jamesog 17 hours ago

    It should more properly be written as dæmon. The æ ("ash") character is usually pronounced more like "ee", as in encyclopædia. I've never heard anyone say "encycloPAYdia" :-)

    • int_19h 10 hours ago

      The original pronunciation of ae/æ in words originating from Latin or Greek is basically like "I". As usual, English molded it into something else in many cases, which is why we write "demon" these days. But if you insist of "daemon", then it really ought to be pronounced like the original Greek δαίμων.

    • bityard 12 hours ago

      Yes. Daemon is just the archaic spelling of demon. The ae is a vowel sound that didn't survive to modern times. The word was NEVER pronounced "damon." To my knowledge.

    • bbor 15 hours ago

      Fascinating! This is why I stick with nice, clean structural linguistics, this applied stuff gets sticky. I just confirmed on Youtube that the (some?) British people do indeed pronounce "Aesthetic" as "ah-stet-ic" not "ee-stet-ic", and upon diving a bit, it seems that the rule is "don't ask for a rule, you fool! It's 'e' now except for when it isn't." Thanks for the interesting tidbit!

        The letter æ was used in Old English to represent the vowel that's pronounced in Modern English ash, fan, happy, and last: /æ/. Mostly we now spell that vowel with the letter a, because of the Great Vowel Shift.
        When æ appears in writing Modern English, it's meant to be a typographic variant of ae, and is pronounced the same as that sequence of vowel letters would be. So Encyclopaedia or Encyclopædia, no difference.
      
      https://english.stackexchange.com/questions/70927/how-is-%C3...

      Highly recommend the protracted arguments in the comments, that's a wonderfully pedantic StackExchange. Big shoutout to someone in 2012 defining "NLP" as an unusual word -- how the world has changed! It's only a matter of time before they open an AP/IB course in NLP...

      • saltcured 14 hours ago

        Hmm, I'm a Californian and I pronounce daemon as demon, understanding the first vowel as the same vowel as for Aesop. Indistinguishable from the vowel in "beam" and "niece".

        But I pronounce the first vowel in aesthetic differently. For me, it's somewhat in between the vowels in "bed" and "bad" but closer to the former.

        • bbor 13 hours ago

          …TIL how to pronounce “Aesop”! Thanks for saving me eventual embarrassment - now I know why other people don’t mix up Aesop Rock and ASAP Rocky!

          As a fellow Californian, I’d say we have authority anyway - I was taught in school that Ohio has the least specialized dialect, but that’s based on newscasters and such. The 21st century is the Californian century!

          …that is, assuming Brussels’ English is out of the running, I suppose ;)

      • int_19h 10 hours ago

        The letter "æ" as used in Old English does indeed correspond to /æ/, but we don't use that letter (or even digraph) for this purpose anymore. In all the words where it is still occasionally used, it corresponds not to Old English "æ", but to Latin "ae", which is [ae̯].

      • jamesog 14 hours ago

        "Aesthetic" gets even stickier! In the UK I tend to more commonly hear it pronounced as "es-thetic".

        The Great Vowel Shift indeed makes written English much more confusing than it perhaps should be. English is already a messy hodge-podge of a language, then our writing system started to get standardised (or standardized, if you're American!) right as pronunciation started to change, leading to the written version of words suddenly no longer being anything like the pronunciation.

      • foobarian 7 hours ago

        Oh I get it so it's like ä!

    • lagniappe 16 hours ago

      because it's spelled encyclopedia

      • jamesog 15 hours ago

        US English spells it as encyclopedia, British English spells it as encyclopaedia.

  • dcow 19 hours ago

    I believe it officially is pronounced the same as demon. But colloquially I hear a lot of (and sometimes find myself using) “damon”.

    • whartung 18 hours ago

      I’m in the Matt Damon camp. Always pronounced it that way, never really gave it much thought. Just seems “right” to me.

      • bbor 15 hours ago

        Hard agree. It's an archaic word, it seems a shame not to revel in that fact whenever you use it! I've been using "automata" a lot recently, and that's another one that is just more fun the unusual way. Also it helps that it's clear either way -- no one will be confused upon hearing "daymon" even if they're not used to it, unlike "etsee", "user-slash-libe", "user-slash-bine". Or, god forbid, "oo-zir slash"...

      • JadeNB 17 hours ago

        And now we can perhaps hash out whether the `lib` in `/usr/lib` is pronounced with a long or short 'i'. I hope I'm not the only one who pronounced it the first way with no real thought, and never noticed until I heard someone else say it with a long 'i' that that was obviously the logical pronunciation.

        • brianmurphy 15 hours ago

          I have always pronounced lib like the word liberal.

          I was mind-blown the first time I heard someone pronounce etc as "et-see".

          et-see rolls off the tongue so much better than ee-tee-see that it makes perfect sense now.

          • emmelaich 5 hours ago

            I've pronounced it as `etcet` as short for `et cetera`. But that's probably my Australian habit of shortening everything.

        • dpassens 16 hours ago

          Surely the logical pronunciation is the way you'd pronounce it in library, so a long 'ai' rather than any kind of 'i'? Though I personally always use the short 'i'. I was going to justify that by saying it's the same as /usr/bin, but that's also short for binaries, so should also be an 'ai'.

          • macintux 15 hours ago

            I've been pronouncing it with the short 'i' for 30 years, but mainly, possibly only, in my head.

            In 1998 I started a new job, and my boss pronounced "URL" as "earl". That threw me for a loop, had to fight my way through our first conversation before I figured out what he was saying.

            • bitwize 15 hours ago

              I pronounce API as "appy", which sometimes draws quizzical looks (people think I'm using next-level cutesy slang for "application"). But I never could do the "earl" thing. Or "sequel".

          • JadeNB 15 hours ago

            > Surely the logical pronunciation is the way you'd pronounce it in library, so a long 'ai' rather than any kind of 'i'?

            Yep, that's what I meant to say with:

            > … never noticed until I heard someone else say it with a long 'i' that that was obviously the logical pronunciation.

            But maybe the sentence structure was too tortured for it to be clear what I was saying.

            > Though I personally always use the short 'i'. I was going to justify that by saying it's the same as /usr/bin, but that's also short for binaries, so should also be an 'ai'.

            Oh, shoot, even after I noticed the logical pronunciation of "lib" (long 'i') it never occurred to me that the same applied to "bin". I guess I just can't say any paths out loud any more.

            • dpassens 13 hours ago

              > that's what I meant to say

              Ah, that makes sense. I thought you meant long 'i' as in extending the duration of the 'i' sound, like in 'beep' vs 'bip'.

            • saltcured 14 hours ago

              Do you pronounce the vowel in /var as in "bar" or as in "bare"?

              Also, for those who try to pronounce everything rather than spell them out, where does it end?

              I now have a newly discovered, morbid interest in how such folks say path elements like "selinux", "httpd", and "pgsql"...

            • fwip 14 hours ago

              Perhaps the difference for you is that "bin" is already an English word with an official pronunciation.

              Personally, I also use short-i for "lib," because I tend to pronounce shortenings of text as if they were words themselves.

burcs 19 hours ago

Saw this on a conspiracy theory subreddit recently, thought it was absolutely hilarious:

"Boy I love trapping demons in microscopic silicon megastructures to do my bidding, I sure hope nothing goes wrong"

  • sgarland 18 hours ago

    I told my eight year old the “we taught sand how to think” joke, and he loved it, and also indulged me in a brief explanation.

    It really is absolutely wild that it all works when you go to the absolute fundamentals and start working forward.

    • somat 14 hours ago

      The funny thing is that before that we taught light bulbs how to think(thermionic logic), and before that we taught magnets how to think(relay logic) and before that we taught levers how to think(gear logic)

      • sgarland 10 hours ago

        It’s magic all the way down.

  • stuckinhell 17 hours ago

    Didn't some Wharton professor post something similar too recently?

emmelaich 5 hours ago

Maybe we should have used `eudaemon` (happy spirit) to avoid alarming the common folk.

keepamovin a day ago

I always wondered about this. Now I know. Thank you :)

bitwize 15 hours ago

I remember learning about Maxwell's Daemon through the Apple II game Dr. Maxwell's Molecule Magic, in which you take the role of the daemon. You must toggle the barrier on and off in order to trap enough gas molecules at high enough pressure to launch a rocket ship. Once you think you have enough, you can then launch the rocket to see how well you did. If you were successful, the rocket would blast off the screen and an image would show of an astronaut on the moon saying "Hi, Mom!" (Speech was provided via PWM through the Apple II speaker.)

Eleven-year-old me was easy to entertain. Especially if rockets, robots, or science was involved.

reaperducer 21 hours ago

I knew the origin of daemon from high school Greek philosophy courses.

At the time, I thought "when an I ever going to use this stuff in real life?" Then I got into computers.

  • AStonesThrow 16 hours ago

    I know, right? I used to read about the role of eunuchs in ancient royal courts, and I thought to myself, who does that anymore?

FergusArgyll 19 hours ago

Huh, I assumed: it does work whilst remaining unseen

pyinstallwoes a day ago

from PIE dai-mon- "divider, provider" (of fortunes or destinies), from root da- "to divide."

to divide power, compute.

pzmarzly a day ago

Interestingly, Safari Reader View doesn't work on this page. Firefox's does.

Alternatively, here's a readable mirror: https://ei.cs.vt.edu/%7Ehistory/Daemon.html

And another: https://old.reddit.com/r/linux/comments/7w7914/the_origin_of...

  • Dalewyn a day ago

    This was the internet we loved, I miss it.

  • latexr a day ago

    > Safari Reader View doesn't work on this page.

    What do you mean? I just tried it and it was fine.

    • pzmarzly a day ago

      For me (macOS 15.0.1), it only extracts the biggest quote (Your explanation of the origin of the word daemon ... United Kingdom web sites), the rest of the text is lost.

      • dcow 19 hours ago

        Works on iOS. Page is so horrendous that I immediately reached for it.

  • Teknomancer 16 hours ago

    “Text of the site below because looking at that site hurt. A lot.” For fucking real!