What is Linux? Unix? POSIX?

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.

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[NERDfirst]

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 YouTube 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!

[ful]

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

[sibaprasad]

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.

[hussein]

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

[georgegeoffrick]

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

[DanielDimitrov-pngc]

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

[MRantzWI]

Very well done! Great presentation with a lot of information....

[abhijeetsingh]

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

[LifenResurrection]

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

[gsahil]

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

[BasedMando]

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

[lumiere]

Very informative and to the point! Thank you 😆

[virality]

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

[natarajanyuvaraj]

Very interesting and informative man. 👏

[chefuzlinamohdfuad]

Very well explained and presented. Kuddos to the presenter.

[andylib]

great explanation, thank you for this

[georgensude]

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

[Aronnax]

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.

[sheriffahmy]

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

[Einhamer]

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