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Hello, you beautiful people.

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And welcome back where we're going to be continuing our discussion of the find command and how we can

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control the search depth that the find command searches to.

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So if I open up our file explorer, I've made a few, few new folders.

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So in our documents folder I have made a folder called Level two.

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And inside there I've got a file called two dot txt and then a folder called level three.

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And inside there I've got a file called three dot tfsi then level 44. txt, level five and five point

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txt where it ends.

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And we're going to be using this to take a look at how we can control the search depth that the find

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command searches to.

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So all of that stuff is in our documents folder, as you can see here.

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So I'm just going to change into our documents folder and use an LS and you can see that level two is

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in there.

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So this is what we're seeing at the minute, this is what we are currently in.

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So let's clear the screen and start our discussion.

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If I just run the find command from here, the find command will search to an infinite depth.

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It will list every file and every folder from this point in the file system.

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Okay, so from here and downwards.

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So if I run that, you'll see it shows us level two and it will show us everything inside there.

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So you'll see we get to dot txt and it shows us a level 33. txt, level four, 4.2 SDA level five and

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five SDA.

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Everything is shown in there, but we can control the depth that the fine command searches to by using

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the max depth option.

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So let me show you how we do that.

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So if we type find we're going to again start from our current working directory, we can actually specify

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that to make it a bit clearer by using the dot.

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By the way, remember dot means this directory, so I'm actually going to use this from now on.

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I'm just going to always start by saying, okay, start from this directory by using the dot.

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So the max depth option, you type one dash and then max depth and you can specify the depth here.

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So let's say we put one.

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So the first thing you might know is, is Ziad, why is there just one dash?

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I thought you said for long form options you need to have two dashes.

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Well, that's right.

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But for the find command, you only have one dash for these options because there's so many of them.

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There's so many long form options.

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I guess they tried to save you typing by just reducing it to one dash.

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Okay, so here we are.

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We have just one dash max depth and then one.

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And this is saying only search to a maximum depth of one.

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Really.

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So if we see that, let's see what happens.

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You see here that we only see the level two folder.

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So a max depth of one is just like seeing what you see here.

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It only shows you what is in the current directory.

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Okay, now if I do max depth of two, that's like showing you what's here and what's one level down.

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Okay.

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So if we if we take a look here, what we should see is we should see level two and then it will go

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inside and it will show you to TXT and the level three folder.

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So if we run that max depth of two, we see level two, which is here, it's showing us the level two

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folder.

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This is where we start.

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So it's showing us the level two folder going in there, showing us to dot txt and level three.

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So we see the level two folder two point txt and level three.

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Okay.

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Now if we want to go to a max depth of three, that's going to go down another level into level three.

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So if I run that, we'll see now that we see three dot txt and level the level four folder shown as

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well.

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If we keep going deeper, if we do max up the four, we're now starting to take a look inside level

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four.

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We're seeing four dot txt and the level five folder and if we do max depth of five, it's going to go

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down even further all the way until we see five txt and you can give it like you know, a max depth

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of 100 and it will still work because all you're defining is a maximum depth.

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Okay?

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It doesn't mean it will go all that way.

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That's just as far as it could go if it was possible.

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Now by default there is no maximum depth, so it will list everything here.

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We didn't have to specify a maximum depth if you wanted to go all the way into the file tree.

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But if you want to limit how far it goes, that's when you use the max depth option and you say, Hey,

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I only want you to show me what's in this folder.

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That's when you use max depth of one, and it's incredibly useful for listing out what's in the current

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folder.

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Now, if we just clear the screen, there's another really great option that the fine command has,

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which is the type option.

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So if we just go all the way back up to our documents here, the type option allows you to search for

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just files or just directories.

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Notice by default the find command lists both.

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It lists both files and directories, but the type option lets you specify just one.

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So if I start here in our documents folder and I list out everything starting at this folder, you see

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that we list out the folders and their files.

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But if I said, okay, I just want to list out the files, what I do is type the type option with again

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noticing just one dash and if I just want files, I would type f f for file.

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Okay.

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So if I press enter now.

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Now you'll see that we just get 4.5.23.2 HD and 2.2 HD.

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We just get the files.

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Likewise.

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I could just get the folders by pressing instead of having f have dx.

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So if I type dx, you know, we now just get the folders.

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So level two folder, the level three folder, the level four folder and the level five folder.

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Starting at this directory here and you can combine this of course with the max depth option.

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So if I do max depth of one now all we're doing is we're going to a maximum depth of one and just showing

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the folders.

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Now I did this on purpose to show you that if you put them this way around, you'll get a warning and

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it says warning.

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You have specified the max depth option after a non option argument type, but options are not positional.

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I'll tell you what this means shortly.

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Really quickly.

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Okay.

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What this means is just put max depth first.

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So that's all you've got to do.

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Okay.

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And that warning goes away.

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So if you're going to specify multiple options, just put the max depth first.

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If I if I clear the screen, you'll see that warning goes away.

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So now we're searching to a maximum depth of one and showing all the directories.

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Let's go to a maximum depth of two.

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We're now seeing the level three folder.

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If I go to a maximum depth of four, let's say oops, not 42, max depth of four as do three.

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Can't type today.

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Maximum depth three.

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We're going to level three and we're seeing the level four folder.

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And if we go into the level four folder, we'll see the level five folder.

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And if we go into the level five, go to level five, it won't make any difference because all that's

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in level five is another file which isn't being shown because all we're looking for is directories.

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So if I go and change that to an F now, you'll see we list all the files and you know, it works exactly

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the same.

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So these are really good options to combine together and there's loads of things that you can do to

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customize the way that the find command actually searches.

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But just to quickly summarize that the type option has two possible inputs.

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You could give it F for file or D for directory.

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And if you're going to use it with the find command, make sure that you give it the max depth option

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first.

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And if we're going to specify where to start from, make sure that comes as well.

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So if we're going to do in the C folder and we're going to list every single file in the Z folder,

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let's say, but only to a maximum depth of one.

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There you are.

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This is every single file that is in the Z folder.

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Oops.

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Let me just clear the screen and do that.

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This is every single file in the C folder without any directories.

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And if we just want to see the directories, then here they are.

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So that's a very useful combination of commands to have there and it will come very useful in your assignment.

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So I'm going to break this video here, keep it nice and short and sweet.

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And in the next video, we're going to pick up with some more awesome stuff you can do with the fine

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command.