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Hello the beautiful people.

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And welcome to this video where we're going to be kickstarting our discussion of how to delete files

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and directories using the command line.

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So in this video you're going to learn how to use the HM command to delete files, and you're also going

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to learn how to use the r m command along with wild cards to make the r m command even more powerful.

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By the end of this video, you'll know how to delete files using the command line, and in the next

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video we'll move our discussion onto directories.

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So let's go ahead and get right into it.

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All right.

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So let's kick off by creating a file called Delete Me in our home directory so we can see that we're

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already in our home directory.

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By looking at our shell prompt, we see the tilde, the squiggle up there, which means we're in the

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shell prompt.

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But to confirm we could just type the command print working directory and see that we are indeed in

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our home folder.

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So let's create a file called Delete Me.

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We're going to use the touch command and type delete me and press enter.

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And now if we use the LS command, we'll see that we do indeed have a file called Delete Me been created.

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We can confirm this of course by opening up our graphical file browser and we'll see a file called Delete

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Me.

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Okay, so so far so good clearing the screen.

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Now that we've created Delete Me, how can we actually delete it?

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Okay.

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Well, the way to actually delete or remove that file is using something called the r m command.

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Now the r m command is r m stands for remove and all you've got to do is give the m command a set of

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paths to files that you actually want to delete.

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And these could be absolute paths or relative paths.

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So if we open up the main page for the R m command, it says that you can give it more than one file.

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You see, you can give it a file and then it's got three dots after it.

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And we know from our discussion of command line syntax or command line layout that these three dots

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mean you can have more than one.

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And if you need a refresher on that, check the cheat sheet in the previous section.

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It's got all that information in there for you.

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So let's go ahead and remove delete me so I could because I'm already in the same folder.

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I could just use the relative path like that or delete me.

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And when I press enter we'll see that delete me has indeed been deleted.

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I could if I create delete me if I create, delete me in our documents folder this time.

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Okay.

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So if we're looking at our documents folder, we see delete me has been created at the minute in the

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command line.

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I'm just in the home folder so if I try to do RMM delete me, that won't work because there is no such

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thing as delete me in this in this directory.

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So delete it.

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I have to do our m documents slash delete me.

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So I have to give it the path relative to where we are now, which is the home folder.

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So here I am in the home folder to get to delete me I have to do documents then delete me.

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Okay.

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So document slash, delete me and I press enter and then it gets deleted and you can have more than

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one.

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So if I go ahead and create a file called let's say file one dot txt that's in our home directory,

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I create a file called file two in our documents.

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So a file two point text in our documents and I create a file called file three dot txt in our downloads.

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So I've got one in the home folder, one in the documents and one in downloads.

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So delete all those.

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I can just enter them one after another.

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So I do m file one txt.

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I don't have to do anything because that will do because I'm already in the home directory.

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The same folder as the document slash file two and downloads slash file three.

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And if I press enter, you see the file one disappeared.

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File two has disappeared from documents and file three has disappeared from downloads.

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So the R command is a very simple command to use for files.

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Just think of it as the opposite of the touch command.

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So if you want to create a file, you do touch file one.

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If you want to delete it, our M to our M file one and it'll work just like that.

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So now that we've seen how to use the r m command in a basic way, let's take it up a notch and use

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it along with wild cards.

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Now, wild cards can really level up the power that your commands have.

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So let's just see.

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See how we do this using the r m command.

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Let's make a few new files.

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Let's make a file one txt let's make file two dot pmg and file three jpg.

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So when I press enter, you see that all three of those have been created in our home folder.

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Okay, now how would we delete every single one of them that ended in dot txt?

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So that's actually just for now.

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Let's make another one file for txt.

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So we've got to the end in txt and we've got one that ends in PNG and one that ends in jpg.

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How would we delete them?

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They're the ones that end in txt.

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Well, first of all, we could do it manually.

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We could say ah rm file one txt and file for txt.

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That would work.

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But I want a bit more of a clever solution than that.

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I want to say delete every file that ends in dot txt.

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Now the way we do that is by giving the command a pattern and anything that matches this pattern will

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be added as a command line argument to it.

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So if I the pattern that I'm going to use is this star dot txt.

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Let us break this down.

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So the star means anything.

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Anything could go there.

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So this whole thing is our pattern.

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The star means anything.

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And then dot txt.

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So what this means is for anything to match that pattern.

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All it has to do is end in dot txt.

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So basically what this is saying is remove everything that ends in dot txt and we press enter on that.

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You see that file one and file four have been deleted because they ended in dot text.

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So let's let's try and see if we could make some other files.

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Let's make, let's make file one dot txt again and file for dot dot txt.

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Let's make those back and then then let's let's create some of the files.

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Okay, let's create some called qibla dot txt and sublime one and then qibla two dot png and qibla three

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dot jpg.

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Okay.

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So we've got some that start with qibla and some that start with the word file.

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Okay.

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How would we delete the ones that just start with the word file?

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Well, the way that we do this is we would use the ram command again.

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Of course, because we need to delete.

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Then we need to give it another pattern.

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So let's think how how would we create a pattern that would match anything as long as it started with

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the word file?

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Well, the way we could do that is we could type the word file and then put a star, because this means

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as long as it starts with file and then has anything after it, it matches.

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So all it has to do is start with the word file.

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And if I press enter, we see that file one, two, three and four.

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Doesn't matter about the file extension or anything.

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As long as they start with file, they've been deleted.

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But all of the problems have been kept there.

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So let's let's create file one, two, three and four again.

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So we're going to create touch file one txt file two dot png, file three dot jpg and file for txt will

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make them back again.

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Okay.

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Now we want to delete all of the files that have the number two in them.

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Okay.

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So how would we do that?

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Well, what we might do is we might say, okay, let's remove it.

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Doesn't matter what it starts with, but it's got to have the two in there and it doesn't matter what

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it ends in.

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So here we are.

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We're saying it could have anything, then the number two and then anything afterwards.

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So if we do that, we see that file two has been deleted and problem two has been deleted, but all

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the others are okay.

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What about getting rid of the ones that end in jpg?

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Well, to do that you just do our m ends in jpg.

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I press enter file three dot jpg and three have been deleted, but all the others that end in txt are

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still there.

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What about deleting those?

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Ah m everything that ends in dot txt press enter and they've all been deleted as well.

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So you can see here how wildcards can really make the your commands a whole lot more powerful and a

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lot more specific.

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There's one more that I want to show you.

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Let's just go up here.

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We've made back our files and let's make back ash blam ash files sublime two dot png, i think.

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Yep.

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And problem three dot jpg.

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Now what if we wanted to get rid of the ones that had two or three in them?

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Well, to do that, remember how we got rid of the one that had two in it?

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We said it could start with anything, then have a two, then ending anything.

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Well, now we want to give it some options.

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And this is where the square brackets come in.

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So if I said, okay, something like that, that's saying it could start with anything, then have either

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a two or three and then ending anything.

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So this should get rid of file two, file three and Sjoblom two and Sjoblom three.

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So if I press enter, there are file two and file three and problem two and should blam three have been

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deleted?

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So wildcards are incredible tools that really allow you to control what's going on when you use your

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commands, and anything that matches this pattern will be passed as a command line argument to the command

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that you use the wildcards for.

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So that's a bit of wildcards in action as well.

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So there you have it.

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In this video you learnt about the Rim Command.

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Now the Rim Command is the command that's used to remove stuff from your file system.

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And in this video we focus specifically on deleting files.

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You also built upon what you learned in the last video about wild cards and saw wild cards being used

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in action to delete files.

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Now, what you saw about wild cards in this video, it doesn't only apply to the M command.

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What you learned about wild cards and how you might do specific tasks works for any command you build

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patterns called regular expressions with wild cards and whatever matches those patterns is passed as

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a command line argument to the command that you're using.

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So there you are.

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You've seen some wild cards in practice as well.

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Up next, what we're going to be doing is we're going to be developing this discussion a bit more and

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we're going to move on to looking at how you might delete directories, how can you delete folders?

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So that's a that's a completely next level.

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It's going to be very exciting stuff.

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So I'll see you in the next video.