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All right we have two more important command line commands to learn before we can move on to node and

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express and actually writing code.

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So those two commands are our AM and the other one is r.m dash Aref.

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Technically this is actually just one command r.m and this is something called a flag which is a way

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of changing what the command does.

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Let's begin with r.m.

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We use our m to delete a specific file.

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So in this case let's go to the fav colors directory.

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And as I mentioned before blue and green are not actually my favorite colors so let's get them out of

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there let's just delete them entirely.

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So we need to CD in two colors slash fav colors just like that and we can see blue green and purple

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to remove blue dot text.

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I need to first type on them and then the name of the file.

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So r.m Blue Dot T or use autocomplete member of that tab.

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And if I type LS It's now gone.

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I don't know if you noticed but it didn't actually delete from the file tree yet.

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And that's just a matter of it lagging a little bit behind because remember when we actually delete

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this file it's on a computer somewhere else.

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So on one of cloud nines computers that they've designated for me to use here.

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So when I delete something yes they send the command from my browser to their computer.

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It then deletes the folder or the file and then once it's been deleted it then sends something back

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to my file tree to tell it to remove blue dot to 60 from the display.

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So sometimes it likes a little bit which is another reason that it's good to just use the command line

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.

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Let's also remove the green tea XTi.

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So r.m green tea XTi.

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And now we're left with just Purple about THC which as I mentioned is my favorite color.

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So that's how we can remove individual files.

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And then the other command is r.m dash R.F. which allows us to remove entire directories.

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So I'm going to back out and one more time and I'm going to delete the entire colour's directory and

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that means getting rid of orange red and yellow that he XTi as well as fav colors and my beloved purple

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that THC going to get rid of all of them by using Ahram dash Aref

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the dash R.F. stands for something that you might not expect.

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It stands for recursive force which basically means that when we say delete colors it's going to delete

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all of the child directories that colour's contains.

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So not only the files here but it will delete fav colors and all the files inside of that.

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And that could go nested as many levels as we want.

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It's going to force delete everything inside of that directory.

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Technically Ahram and r.m dash R.F. are the same command line command and dash Areff is a modifier or

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what's called a flag for the r.m command.

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So it's still the r.m command.

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But dash R.F. will have it do something slightly different.

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And then we need to provide an argument which is the name of the directory to delete.

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And in this case it's colors.

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So r.m dash R.F. space colors and I hit enter.

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And you can see my entire colors directory just disappeared.

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If I type LS over here there is no colors director anymore.

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If I try and C.D into colors it tells me no such file or directory and it's all gone including my fav

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colors directory and my purple that TXI the file as well.

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To summarize r.m will delete an individual file and Ahram dash R.F. will delete an entire directory

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.

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One interesting note about r.m dash Areff is that if you're not careful and you use it in the root directory

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of your entire computer you could actually wipe everything from your machine.

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And I've never actually seen that or heard that happen.

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It's almost like an urban legend I guess at this point but it is something that is technically possible

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.

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If you did r.m dash RF slash which almost scares me to even type that even though I have nothing of

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value on this workspace yet.

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If I hit enter that could delete every single thing in this workspace.

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It's an interesting tidbit but it's also worth knowing about