Hey everybody and welcome to the next video on the Linux operating system module.
Now in this video we're going to be going over something called IDE nodes.
Now we've touched all we've touched on AI nodes before briefly but now we're gonna go in a little bit
more detail on them.
So what does an AI node as a recap.
It is a unique number associated with a particular file.
Now I nodes also are attached to a block number which is then attached to a block group in the files
in the Linux file system.
We've talked about with that particular video.
Now what's in it.
Now it's all useful information about a specific file such as the permissions on the file which we've
already gone over before the owner I.D. which we're going to go over in a separate video.
Just know that this is the user i.e. now we have a group I.D. So the idea of the group the size the
file the number of hard links associated with that file the time it was last modified the time it was
last accessed in the last time the AI node was modified.
Now I want to take a step back here and make sure everybody understands what the directory actually
is now a directory is still just a file but what it does is it has a entry table that has a file name
and directory name if there's some directories and I note numbers.
Now the reason that's important is because when you move data and use the end the command you're not
physically moving any data which is why when you move you can move gigs within half a second.
As long as it's on the same file system you're not going to run into any issues with that.
Now if you start hitting into different partitions that's when things will take take a lot longer but
if it's on the same partition the same file system then moving it is does nothing more than take the
entry of that file or files removes it from the current directories table and adds it to the new one
so that way when you search for that directory or that particular file or files we have it in the other
directories table.
So it'll be searched up from there.
Now when you've ran Ella stash Ella you might have seen the dot in the dot dot now dot is an entry in
the directories table for the current directory that you're sitting in and the dot dot is referring
to the parent directory.
So again it has the DOT is associated with the eye node number for the current directory and the dot
dot is is the is associated with the eye node number of the parent directory so there's always a correlation
between the two.
Now we're going to go over quickly how to search through eye nodes.
Right.
So right now we have a file called test start to XY.
So we see here we have our permissions our name group date size etc..
Right.
So we're good here.
So what we want to do is we want to do less.
Dash L. A.
I know what that's gonna do is bring us this extra number right here.
So this number is our I know number for the five for the number of tests that are the file test to 16.
Now let's see if we can actually search by an I know number as well.
So if we do find in the current directory we're looking at item then we give it the I know number
e oh okay copy come on
0 1 3 3 7 3 1
0 1 3 3 7 3 1.
That's right.
Yep.
And then we're going to do a dash print so we can see it.
It found just our test that takes time.
Now if we come in here and change this number to 0 we don't get anything.
So we have that's not the I know number associated to it.
So go ahead and play around with looking at I know numbers and searching them up on the system that
we've set up before.
And if you run into any problems again go to the Facebook group with more happy out.