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[No audio]

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Next topic we have is combining and splitting files.

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You could combine multiple files into one

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and you could combine one file, you

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could split one file into multiple files.

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Like just an example right here.

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When you cated three files, you could output

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of all those files into a fourth file,

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which is you call it file4.

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So what will happen is whatever is inside, whatever the

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contents of those files, one, two, three, they will be

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combined and they will be pushed out toward file4.

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So that's how you combine it.

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So how do you split it and why do we need to split it?

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Okay, well, there are certain times when you do have big,

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huge files and you do need to either compress it.

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If the compressing is not an option, then what

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you could do is you could split it.

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Meaning you chop that file into different files.

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And the reason you do that is because sometimes you have

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to send files across one computer to another or to a

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third party vendor, or if it's a log file that they

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have to check, they have to check and it's huge.

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And it's huge.

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So the only way to do, and your

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only friend is out there is the split.

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So you split it, chop it, whichever the number of files

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that you want to do and boom, you will have it.

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So let's look at this file that we

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have and we will create some files.

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And in this example, you see I have a file

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and I'm splitting the file in 300 lines per file

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and putting it into a file called childfile.

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Let's look at our Linux machine and I

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will explain it to you much better while

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we are doing it through the command line.

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[No audio]

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Okay, this is our Linux terminal, which

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you guys are very familiar with.

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Okay, we are in our home directory, just confirmed that.

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So we don't have to put all the practice files

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or the stuffs that are not belong to other directories.

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So we know we are in the right directory.

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Now I want you to create a file,

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let's call it,

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[No audio]

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countries, or you know continents.

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[No audio]

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Let's call it countries That's fine.

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[Author typing]

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The file is created and I am using vi

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So the first line I'm going to create is England.

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This is just a country.

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Second one is USA, third one is Canada and so on.

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But if you don't know how to use VI at

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this point, you will be learning VI later on.

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But if you don't know how to use VI at

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this point so what you could do is echo.

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Let's remove the countries file, then do echo, put

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usa into countries, cat it and you will see.

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Yes, it's there.

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Next one you put an echo uk and

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you output with two redirects, to

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[No audio]

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countries. Make sure it's there.

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Yes, we have two countries.

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We will keep doing that until we have some text in it.

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So uk, uae,

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[No audio]

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and canada and

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[No audio]

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and

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[Author typing]

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france, and

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[Author typing]

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switzerland, and we'll stop here, japan.

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So just do that,

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confirm, that you have all those contents in there.

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So right now, how many lines do we have?

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We'll do,

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we have 7.

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So I'm going to make, split them, into split,

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and just check the option is -l,

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I'm going to split two lines each of countries, and

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I'm gonna put them in a file called separate,

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just sep,

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and I'm going to hit enter.

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Now let's see what we have.

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So you see, automatically Linux knows that once

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I'm going to create file sep, of course

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I requested to create two in each file,

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it has automatically appended with names like a, a, a, ab, ac, ad.

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So let's look at what's in our aa file.

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We have usa and uk, bb

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[No audio]

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sorry ab,

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[No audio]

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uae and canada,

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ac france and switzerland,

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and the last one is japan.

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Okay, so every file has two entries.

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Why we don't have two entries in the last file?

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Think about it. I'm going to give you a couple of seconds.

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[No audio]

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Okay, I hope you guessed it right because, we do not have,if you go

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to countries file, we do not have the exact numbers.

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Meaning we do not have eight lines.

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So that's why it took the first two put it in

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one, first two second file, first two third file, and since

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we didn't have anyone, japan was the only one left alone,

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sorry, japan,

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and that's why it went just into one line to that file.

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That's how combining file and splitting files work.

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This is a helpful tool when you have

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to split large, long, huge files, and you

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have to transfer from one computer to another.

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[No audio]