What is Linux? Unix? POSIX?

Рет қаралды 56,419

Күн бұрын

What's the difference between Linux and Unix? They look and work the same but they don't seem to fundamentally be the same thing. Today, we take a closer look at what these differences are and how they've come about.
= 0612 TV =
0612 TV, a sub-project of NERDfirst.net, is an educational KZfaq channel. Started in 2008, we have now covered a wide range of topics, from areas such as Programming, Algorithms and Computing Theories, Computer Graphics, Photography, and Specialized Guides for using software such as FFMPEG, Deshaker, GIMP and more!
Enjoy your stay, and don't hesitate to drop me a comment or a personal message to my inbox =) If you like my work, don't forget to subscribe!
Like what you see? Buy me a coffee → www.nerdfirst.net/donate/
0612 TV Official Writeup: nerdfirst.net/0612tv
More about me: about.me/lcc0612
Official Twitter: / 0612tv
= NERDfirst =
NERDfirst is a project allowing me to go above and beyond KZfaq videos into areas like app and game development. It will also contain the official 0612 TV blog and other resources.
Watch this space, and keep your eyes peeled on this channel for more updates! nerdfirst.net/
-----
Disclaimer: Please note that any information is provided on this channel in good faith, but I cannot guarantee 100% accuracy / correctness on all content. Contributors to this channel are not to be held responsible for any possible outcomes from your use of the information.

Пікірлер: 130

@NERDfirst Жыл бұрын

Corrections / Notes: At 4:47 I describe the role of a kernel as one that translates instructions for hardware. This is a rather unfortunate oversimplification of the role of a kernel to the point where it's become somewhat misleading. For that I apologize and thank KZfaq user Irvin Cote for pointing that out! A better description would be that the kernel decides on hardware allocation and management with regard to software - One very important example of such a role is managing the areas of RAM that is allocated to each program and which processes run on which CPUs at any given moment. Again, this is still very much of an oversimplification. The goal of this video isn't really to discuss the implementation of operating systems (maybe that can be another video!), but hopefully this makes things a little less misleading. We regret the error, and thank you again to Irvin for pointing this out!

@ubayyd Жыл бұрын

Thanks for the clarification! You should pin this comment. 🙂

@NERDfirst Жыл бұрын

Hello and thank you for your comment! This comment was pinned immediately after it was written. Did it show up as a regular unpinned comment for you?

@34521ful 5 жыл бұрын

This video deserves way more views. Amazing job! Looking forward for more videos

@NERDfirst 5 жыл бұрын

Hello and thank you very much for your comment! If you like, you can check out the channel, there's a lot more there :)

@wyleong4326 3 жыл бұрын

24K views as of Christmas 2020, it’s gonna continue to grow...

@sibaprasad1803 4 жыл бұрын

awesome video man... I needed just this one video, but still couldn't stop myself from subscribing. Such precise and on point videos are rare in youtube.

@NERDfirst 4 жыл бұрын

Hello and thank you very much for your comment! Glad you liked the video =)

@georgegeoffrick288 4 жыл бұрын

First I was hesitant to watch this because of the views, and at the end best presentation ever. Great job

@NERDfirst 4 жыл бұрын

Hello and thank you for your comment! Glad you stuck around, and great to know you liked the video =)

@hussein3115 2 жыл бұрын

bro you are a legend, I have been struggling with this for months, I always though I got it but then something would come up and I didn't know what I thought I did

@NERDfirst 2 жыл бұрын

Hello and thank you for your comment! Glad to be of help =)

@DanielDimitrov-pn5gc Жыл бұрын

One of the very few videos that really deserves pressing LIKE ! Very rare and detailed explanation! Thank you!

@NERDfirst Жыл бұрын

You're welcome! Very happy to be of help =)

@3gsahil 2 жыл бұрын

Perfect !! 👌 The best explaination I could find . Thank you ❤️

@NERDfirst 2 жыл бұрын

You're welcome! Very happy to be of help =)

@georgensude6946 5 жыл бұрын

Bang on!!!!. Very precise and detailed.

@NERDfirst 5 жыл бұрын

Hello and thank you very much for your comment! Glad you liked the video :)

@FXK24 4 жыл бұрын

Very well presented, thanks!

@NERDfirst 4 жыл бұрын

You're welcome! Glad you liked the video =)

@lumiere2598 2 жыл бұрын

Very informative and to the point! Thank you 😆

@NERDfirst 2 жыл бұрын

You're welcome! Very happy to be of help =)

@georgebenjamin6632 3 жыл бұрын

I love your videos man. Thank you!

@NERDfirst 3 жыл бұрын

You're welcome! Glad you liked the video =)

@natarajanyuvaraj5265 Жыл бұрын

Very interesting and informative man. 👏

@NERDfirst Жыл бұрын

Hello and thank you for your comment! Glad you liked the video =)

@chuck327 Жыл бұрын

Awesome video. Very clearly explained

@NERDfirst Жыл бұрын

Hello and thank you very much for your comment! Glad you liked the video =)

@andylib 4 жыл бұрын

great explanation, thank you for this

@NERDfirst 4 жыл бұрын

You're welcome! Glad to be of help =)

@SebastianGavajda 5 жыл бұрын

Solid presentation. Thumbs up.

@NERDfirst 4 жыл бұрын

Hello and thank you very much for your comment! Glad you liked the video =)

@patrickmullen2914 Жыл бұрын

Really great video. A thumbs up 👍

@NERDfirst Жыл бұрын

Hello and thank you for your comment! Glad you liked the video =)

@debojitkumardas9260 3 жыл бұрын

Amazing!! Subscribed.

@NERDfirst 3 жыл бұрын

Hello and thank you for your comment and support! Glad you liked the video =)

@sachinthomas3772 5 жыл бұрын

nice one brotha well explained

@NERDfirst 5 жыл бұрын

Thank you! Glad to be of help =)

@AdventureSteven 3 жыл бұрын

clear explanation, thank you!

@NERDfirst 3 жыл бұрын

You're welcome! Happy to be of help =)

@ediahtAnhoJ 3 жыл бұрын

Thanks very much... I have been looking for the meaning of POSIX and after reading so much and watching so many - I found this video that actually laid bare what POSIX is at a High-Level. Appreciate the work done

@NERDfirst 3 жыл бұрын

Hello and thank you very much for your comment! Glad to be of help =)

@anshsharma3964 2 жыл бұрын

was doing exactly this and found the answer here

@thiruvenkatakrishnan4242 3 жыл бұрын

Very informative video 👍👍

@NERDfirst 3 жыл бұрын

Hello and thank you for your comment! Glad you liked the video =)

@deepankarmishra8198 3 жыл бұрын

This was really helpful

@NERDfirst 3 жыл бұрын

Hello and thank you for your comment! Glad to be of help =)

@whattheydoexactly7794 11 ай бұрын

Thank you for the video

@NERDfirst 11 ай бұрын

You're welcome! Glad to be of help =)

@erichkohl9317 5 жыл бұрын

Very good explanation. 😀👍

@NERDfirst 5 жыл бұрын

Thank you very much! Glad you liked the video =)

@bunggo9914 2 жыл бұрын

wow, this is an amazing explanation.

@NERDfirst 2 жыл бұрын

Hello and thank you very much for your comment! Glad you liked the video :)

@giftchukwuemeka8324 Жыл бұрын

awesome video

@dibbyo456 4 жыл бұрын

Great explanation... 👌

@NERDfirst 4 жыл бұрын

Hello and thank you for your comment! Glad you liked the video =)

@abhijeetsingh1573 3 жыл бұрын

Thank you I was confused in what is posix and how it works in unix and linux

@NERDfirst 3 жыл бұрын

You're welcome! Glad to be of help =)

@magoyama 5 жыл бұрын

great video, thank you

@NERDfirst 5 жыл бұрын

You're welcome! Very happy to be of help =)

@GroundControl2MT 5 жыл бұрын

Thanks for the explanation

@NERDfirst 5 жыл бұрын

You're welcome! Glad to be of help =)

@SandeepSharma-sr4rj 6 жыл бұрын

Cool, thanks!

@NERDfirst 6 жыл бұрын

You're welcome! Glad to be of help =)

@chefuzlinamohdfuad7822 4 жыл бұрын

Very well explained and presented. Kuddos to the presenter.

@NERDfirst 4 жыл бұрын

Hello and thank you very much for your comment! Glad you liked the video =)

@BasedMando 2 жыл бұрын

Not mentioning Windows under Unix group example was a nice touch, LOL!

@NERDfirst 2 жыл бұрын

Heh, I actually didn't know Windows was involved at all? I thought I did my research, but this really is an expansive topic and I guess that flew under the radar.

@thineshkumar5068 9 ай бұрын

Fine explanation

@NERDfirst 9 ай бұрын

Hello and thank you for your comment! Glad you liked the video =)

@pramitchaudhury1821 3 жыл бұрын

Thanks so much

@NERDfirst 3 жыл бұрын

You're welcome! Glad you liked the video =)

@Aronnax777 2 жыл бұрын

Great video, but If I remember correctly while all linux operating systems have the same kernel. Unix operating systems like Mac OSX are Unix derivatives (that have been certified) but don't have a Linux kernel. Linux is technically a Unix derivative as well, but it is not Unix certified.

@NERDfirst 2 жыл бұрын

Hello and thank you for your comment! Yes, that's my understanding as well, the difference being in the kernel. Though I believe as long as _any_ operating system can meet the Unix specs (and you pay for the certification of course), it's considered Unix.

@MrTamilindian 5 жыл бұрын

thank you so much...🙂

@NERDfirst 5 жыл бұрын

You're welcome! Glad to be of help =)

@virality365 2 ай бұрын

MacOS is Aqua built on Darwin kernal which is a posix compliant Unix system.

@mk677hd 6 жыл бұрын

Awesome

@NERDfirst 6 жыл бұрын

Thank you! Glad you liked the video =)

@celsiusfahrenheit1176 4 жыл бұрын

excellent

@NERDfirst 4 жыл бұрын

Hello and thank you for your comment! Glad you liked the video =)

@aradhanamurarka2949 Жыл бұрын

Thanku sir

@NERDfirst Жыл бұрын

You're welcome! Glad to be of help =)

@Einhamer 2 жыл бұрын

I came to finally satisfy my doubts about these terms! And while i did it, I learned that some stardards might be kinda sus...

@NERDfirst 2 жыл бұрын

Great to hear! Happy to be of help =) And if you think about how the various flavors of Linux and UNIX are all about following the same standards and being like each other as much as possible, you could really say it's impostors all the way down.

@ianpatricklulu6179 2 жыл бұрын

amogus

@mantisfootball918 4 ай бұрын

Haha.

@267praveen 4 жыл бұрын

Questions 1. Is Solaris OR macOS not POSIX compliant but SUS compliant? 2. Is Android POSIX compliant but not UNIX (SUS) compliant?

@user-eh5zk5bb9k 3 жыл бұрын

nice!!!!!!!

@NERDfirst 3 жыл бұрын

Hello and thank you for your comment! Glad you liked the video =)

@Killerkraft975 6 ай бұрын

TLDR : They fundamentally work the same. Unix has a 'standard' to be certified, thus becomes proprietary. The main differences is that Linux is basically just open source Unix

@NERDfirst 6 ай бұрын

Hello and thank you for your comment! While this is a succinct summary of the functional differences (which are little), the history is a lot more interesting, so hopefully the video is still worth a watch :)

@JJordanov945 4 жыл бұрын

Should I be afraid if two years after this video was published I decide to watch it on a Wednesday for the first time and he says "Hello and welcome back to a random Wednesday episode" ??

@NERDfirst 4 жыл бұрын

Hello and thank you for your comment! To be fair, there's a 1 in 7 chance of getting that right =P

@sherif96fahmy Жыл бұрын

you cannot understand how this video impacts peoples lives lol. Thank you

@NERDfirst Жыл бұрын

You're welcome! I wouldn't think this was exactly life-changing, but all that matters is that you walked away with something useful =)

@coffeebeansncomputermemes Жыл бұрын

Great vid, thank you! ... But at 6:46 you state that Linux is a derivative of Unix which I don't think is true. While I Would agree that it does fall under the umbrella of Unix-like systems, and although the intentions of the creator of Linux were to build a FOSS Unix clone, he did in fact build it from scratch. So I think saying it is a derivative is a bit incorrect. As far as I Know at least.... ***edited to change the timestamp from 6:56 to 6:46

@coffeebeansncomputermemes Жыл бұрын

Also I think the part about POSIX and SUS specs is really cool! I knew about POSIX but had no idea about SUS. I always wondered exactly how macOS is branded as Unix and it must be because they conform to the SUS standard then. Very cool

@NERDfirst Жыл бұрын

Hello and thank you very much for your comment! Yeah, I suppose I should've made it clearer - Linux was indeed written from scratch, but what I was trying to say is that the design and architecture was modelled off Unix (specifically minix), so it's a derivative in that sense.

@TheRiishii 5 жыл бұрын

Woo cool

@NERDfirst 5 жыл бұрын

Thank you! Glad you liked the video :)

@RamkrishanYT 3 жыл бұрын

But you forgot to include hannah montana linux, the most popular linux, in popular linux OSs

@NERDfirst 3 жыл бұрын

Hello and thank you for your comment! Oh gosh that really does exist...

@totalingseven 3 жыл бұрын

me when I see the title : Linux😮 Unix😲 Posix😱

@agnesakne4409 4 жыл бұрын

Are u a computer science student?

@NERDfirst 4 жыл бұрын

Hello and thank you for your comment! I was a computer science student. I'm currently a computer science graduate =)

@agnesakne4409 4 жыл бұрын

@@NERDfirst I believe you're a good man Mister!

@naveen9102 2 жыл бұрын

most of the quality videos like this doesnt have the views they deserve

@NERDfirst 2 жыл бұрын

Hello and thank you very much for your comment! Glad you liked the video =)

@mindlessgreen 4 жыл бұрын

So fucked up! Thanks for the great explanation.

@NERDfirst 4 жыл бұрын

You're welcome! Glad to be of help =)

@kushailsingh8400 3 жыл бұрын

Linux branches out of Unix at some point way earlier in the Unix life cycle.

@scality4309 3 жыл бұрын

Dennis?

@NERDfirst 3 жыл бұрын

Hello and thank you for your comment! Looking for someone?

@no-ld3hz 2 жыл бұрын

Bsd isn't unix, it's unix like Linux is unix-like because it was based off of core concepts of unix

@NERDfirst 2 жыл бұрын

Hello and thank you for your comment! This is interesting - BSD itself also refers to a family of operating systems, which is a point I didn't catch while I was researching for this video. Apparently BSD _did_ make some Unix-compliant operating systems, but common flavors we hear about today like FreeBSD and OpenBSD are indeed only Unix-like.

@no-ld3hz 2 жыл бұрын

@@NERDfirst yeah I just wanted to clear up some confusion. It's rare for an operating system to actually use unix.

@inverto492 Жыл бұрын

Correction at 4:47 about what the kernel is and its role, No the kernel is not "handling the though responsibility of translating instruction of applications to what the cpu and ram can understand" This is not remotely true.

@NERDfirst Жыл бұрын

Hello and thank you for your comment! Yes, looking back, I think that, wanting to come up with a one-line description of the kernel, I oversimplified things a little too much. I'll put up a pinned comment to explain further!

@mr_1wr572 3 жыл бұрын

When MacOS is sus

@NERDfirst 3 жыл бұрын

I mean, it _is_ pretending to be Unix, and succeeding!

4 жыл бұрын

You should clean your glasses broh

@NERDfirst 4 жыл бұрын

Heh, sorry about that! Those were my old glasses and some of the coating was damaged so it'll always look patchy and gross. I've gotten them replaced entirely since.

@xcoldbloom 3 жыл бұрын

the audio is weird: at random times your voice will have less volume like you're backing away from the microphone. also plz dont show ur face again

@NERDfirst 3 жыл бұрын

Hello and thank you for your comment! I'm sorry you've had a bad experience! The poor audio quality is due to the dynamic range compression effect and room noise, and the talking head shots is to reduce turn-around time. Unfortunately we have to work within tight time and cost budgets so some compromises had to be made!

@__gadonk__ 3 жыл бұрын

What the fuck?!