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OK so this is my second time recording this video the first time I forgot to turn my microphone on and

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performed for my cat.

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So she approved of it.

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Let's see if you approve of it the second time around now that I have a little bit of practice.

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So we're going to be talking today is really talking about viewing creating and editing files.

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So I've already showed you the echo command if you recall we used echo to create a file.

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Right we created a hollowed out tax and we can just echo hello out to the terminal.

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We could say echo hello and I'll say hello back.

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So what we can do with Echo is we can use it to write to a file.

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So if we were to say echo hey and then we write it to hey that text well we can look and see that hey

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that text is here and you can see my files from the previous one.

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So I'm trying to come with more ways of saying hello but we're gonna use hey that text here.

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So if we can't pay that texts all Kat does is print out to the screen what is in a file it says hey

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OK.

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So let's say we want to append cat or we want a pen.

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Hey that text while we can tab up here.

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What if we just say hey again we've got this greater than symbol here and we're just putting it into

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the hate text file.

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Well that didn't work we didn't spend it.

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We actually overrode it.

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So what if what can we use to actually over append this here's what we can do is we could say hey again.

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Again.

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Right.

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Just to give us something different and we can add a second greater than symbol here.

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So now if we cat the file you can see that we actually appended to the end of it.

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So this becomes incredibly useful when we are either adding stuff to a list say we're gathering IP addresses

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or we just want to combine our lists or when we're creating a series of commands and we're going to

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use those commands to send all at once.

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We're going to cover that later when we're talk about file transfers and the penetration testing section

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where we use a set of commands like this on a Windows machine to actually transfer files via FTB is

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just so much easier than typing them all in one by one we can create a little document and run the document.

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So this becomes useful when we have a series of commands and for other reasons as well as you'll learn

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as you go on in your Linux career so we've talked about Echo and we've talked about cat.

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So let's talk about some other ways to create a file.

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We can use something called Touch and to say new file that tax.

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And if the less you could see that new file that Texas here.

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But if we cat new file there's nothing in there because we haven't put anything in there yet.

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So there's a few things that we can do.

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We could use echo and append the file.

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Right.

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We could also use a tool called Nano no Nano is a terminal text editor.

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There are other terminal text editors like VI in vim.

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I don't prefer those personally I like now the most some people have their preferences.

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So I encourage you to play around with any of them as you wish.

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Vi and them are the other two but for this course we're gonna be using nano.

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So if I say nano new file text I could type whatever I want in here

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and we're gonna be using nano a lot to create scripts to create python scripts and to edit shell code

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as we get into a little bit exploit development.

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So I'm going to hit control X I hit y for saving and then we'll save it to new file that text if we

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catch this.

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Now it says hey I could take whatever I want in here.

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So that's one way of editing it.

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Another way of editing it is using a graphical interface so we can use g at it and say new file and

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if you don't like using a terminal you're more than welcome to use it here.

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Just type in new line here and save it.

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And I I like using G edit it's a lot cleaner because I can you know highlight and delete I don't have

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to use my keyboard to navigate around like I do in the terminal.

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So if you have the option to use git it for sure but sometimes you're gonna be on another machine that's

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not your own or is headless and doesn't have a gooey that you're gonna have to use now.

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So get comfortable using both.

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So we say this let's go ahead and cat it out and see what happens.

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OK.

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You could see that the new line is in there so really that's the overview that I wanted to cover.

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So just know that you can create files pretty much using echo touch.

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And actually you can create files using nano as well.

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You say nano this is new that text although say hello control X say that you al s you could see this

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is new that text is right here so you can use all of these tools in different ways to create files.

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It's completely up to you how you want to do it.

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Personally what I'm creating a file I use nano and I just create a new shell script python script a

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text document.

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That way you could also do it using G edit as well.

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So just know that we're gonna be using this a lot and try to get comfortable with these.

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And from here we're going to be moving into controlling Kelly Services.

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So we're just going to briefly talk about what services you need running on boot and how to do that.