Name: Linux - File and Folder Permission Introduction
Uploaded: 2020-03-26T10:14:13.000Z
Duration: 15 min 24 s
Description: Thousands of YouTube videos with English-Chinese subtitles! Now you can learn to understand native speakers, expand your vocabulary, and improve your pronunciation...

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So in today's video, I'm going to give you an introduction to permissions in the world of Lennox.

Hold on, hold on Breathing and Maria breathing.

I know, I know a lot of people would start getting things like permissions and Lennox.

They start hyperventilating because they know how in the same Microsoft active directory permissions could be.

And they're thinking, Oh, my golly, I just finally figured out Microsoft's permissions.

Now I have to figure out Lennox Well, here's a thing do realize, at least in a base Lennox over a base Lennox installation permissions within the Lenox world are just so much simpler than the Windows world, the Windows world.

At this point, you'd probably have to have a whole freakin book used to know all the permissions, right?

Sharing permissions and local permissions and all kinds of permissions going on Now we have to realize in Lenox World is it is that is not the case.

Permissions in the Lenox world are incredibly simple, possibly too simple you could argue.

These with a base insulation, but they are incredibly simple.

So, really, In the Lenox world, you only have three actual permissions in a base insulation.

So read means that you can read a file or folder.

Uh, right means you are able to write to a file folder.

So basically, it means you're able to modify it or edit it, that you do have to be careful the Lenox world, because this is one of those places where you go like Well, hey, Lennox, folks, you didn't have to go Quite insane.

But it could have added a couple more, because when you have the right permission that it gives you the ability to write to a file and rename a file and delete a file or folder, eh?

So one of the problems you run into the right permission is that's one of those permissions.

It can give a little bit too much power people on.

Then finally, you have the execute permission and simply the execute permission is that if it is a script or inexcusable that it allows you to actually run that you have read right and execute.

And those are the only permissions you have passed that you're then able to set those permissions for three different groups.

The first group, whenever you're looking at permissions, is the first group will be the actual user account that is the owner of the file or folder eso in the demonstration that I'll show you today, Bob Bob is the user account that you've been using.

So Bob has particular permission to a file or four.

It's a read right execute, I read, write whatever else the first set.

That is for the user's account that his owner of the file folder, the next set of Reed right execute.

That is for the group owner of the Filer folder.

So you can put user accounts into a group, and then you can set a group owner for that file or four eso.

Let's say Bob has read right, execute permission on a file a voter, and then you can have Bob's grew another group Bob is in.

Are you know, whatever permission to the Final Four so you can actually have a different set of permissions for members of a group that are owner for that file folder, and then finally in the last group that that we talk about is the everyone group.

So you have the user account, the group owner account and then literally everybody else.

So any other user account or user that was able to access the file folder no matter where they are, whether they're sitting at the command line at the system or whether they're, you know, on the other side of the universe, as long as they get to that file folder through the network, somehow that is the final permission, and that is whatever permissions they are allowed.

So one of things that you'll see a lot, especially in the Web world, is you may have a user account.

The user account has a read right execute permission for a file or folder, the group account.

They'll have whatever permissions they have on Finally, the everyone, everybody else, the world will simply have a read access.

So you have Web pages, you have images, you have that type of stuff they will be able to read.

They will be able to see that information, but they won't be able to do anything else.

So those are the three permissions that you have in the three groups that you'll be dealing with.

Now, when you hear that, you might be thinking.

Okay, well, where did the numbers come from?

I've heard of 777751756 What are those numbers?

So when you look at those numbers, basically what those numbers being is, those are new miracle representations of Reed, right?

So the 1st 7 of the first number is for the user account.

The second number, the 2nd 7 or whatever else it is, is the permissions for the group owner.

And the final number is the permissions for everybody else.

When you're looking at the numbers, basically what you have is one the number one that stands for execute the ability to execute.

Whatever is in the filer Fuller, Are you able to run?

We're talking about actually writing to a file folder or we're talking about renaming it or deleting it.

And then finally, four is read and read means you're able to read, and then all you do in order to get that 777 is you basically added up.

So if you want to give people read Rite permission to a file folder, it will be to Farid for for right, so that will be six.

If you want to give people simply, you read ability for a file folder that would simply before, if you want somebody for some reason, have the reed and execute.

Execute is one, so therefore you get five.

And so that's basically how the numbering system work.

It's works, and it's relatively simple, so that let's go over to the computer so I can give you a bit of a demonstration to show you kind of how this looks in the real world On again and again, to be clear, clear it's a sample is a symbol is not the Windows world.

The Windows world's great I Love active directory, but wow, that crack can get complicated.

And Lennox World, this is much, much, much more simple and the main reason people get tripped up is because they in their mind, they're thinking that's more complicated than it actually is.

So let's go over to the computer and I'll show you how this works.

My computer, I just buy has created this little keynote slide again just to give you a visual.

Sometimes you feel like visual representations.

One equals, execute two equals, right for equals.

Reid s when you're actually sitting there at a Lennox consul and you're looking at what the end result will be if you have zero, What that will mean is basically, there is no permission there.

Whatever group or user you're talking about, we'll have no permission.

If it is one, they'll have the execute permission.

If it's too, they'll have the right permission because he slashed hyphen w hyphen.

If it's three, they'll have hyphen right and execute permission.

If it's four, it'll equal read hyphen, hyphen.

So you have to read and execute permission.

Write hyphens who have read Rite permission and seven is read, write or execute.

Basically, we're talking about full control.

And so what you'll do is you'll see these numbers and again you'll see like seven, 77 or 750 And so those will be an order, user account, group owner account, and then everyone else we go over here, we just take a look at this other slide again just to reiterate this.

So the first number is owner, or the first letter is owner.

The owner has full control, The group has full control, and literally everybody in the world has full control.

Generally, you don't do 77 It is the big player.

Just to be clear, I'm not one of those hyper fanatical security people.

But this is something that you just don't do past that.

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Linux - File and Folder Permission Introduction

literally

incredibly

obvious

access