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In this lesson, we'll go ahead and create a script.

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So we're just going to walk through some

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of the commands that's in the script

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and just go over how it's broken down

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and describe some of the commands

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that make it easier to understand.

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So the first thing we want to do we're going to create a file.

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Name it check_storage.

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Now we use a test command just to create

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a shell of that file

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and we're going to change the ownership.

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So we're able to modify it

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cause we're going to use a text editor.

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So we going to change the ownership to me

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cause it's right now it's under the root

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and then we'll be able to change it

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and make manipulations to it.

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We'll change own command.

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Change it to me.

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Okay. Then we have to change the permissions.

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All right.

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So let's make sure they went through.

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Okay. Now it's a lot easier to manipulate

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the scripts using that text editor

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so we going to applications, accessories

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to text editor.

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We're going to open it.

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Typically it's going to be

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in other locations

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computer

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scripts

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storage.

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Okay.

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Now we're going to modify this text editor.

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We want to display the line numbers

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and I like to highlight the current number.

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So we're going to begin the script

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by writing some contextual echo statements

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just to let us know

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and whoever runs the command what's going on at this point.

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So whenever the script first runs

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this will let us know by printing out this message

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on the screen saying beginning storage check.

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I want to put the date in.

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It's going to echo the date.

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It's going to use the,

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remember the dollar sign is for a variable

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and going to use the date command.

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Okay?

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So at this point, what the system's going to do is

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read date

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and then it's going to print out the actual date by

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running the command analytics environment.

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And next we just going to add some hyphens.

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Again, this isn't important

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this is just going to make the output a little bit

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more visually appeasing.

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Okay.

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So next we're going to declare a variable.

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We will name it part, sample partition

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do a dev

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sda1

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Okay. Now we're about to run a command

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and we're going to declare this command.

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Of course it's going to be ours.

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Call it, check percentage.

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This command is about to get pretty lengthy

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but after I finish it, we're going to break it down.

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All right.

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So that's a pretty long command

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but what I'm going to do is I'm going to go back to the

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terminal and we're just going to break down each one

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just for a little reference.

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We should be familiar with all these at this point

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but again, for reference, we going to break it down.

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So first thing I'm going to go through is the

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disk free H

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so this command just shows us the storage that's available

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and it's going to put in a human readable format.

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That's what the H option stands for.

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Okay.

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Then we'll go to grip.

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Now we'll have to use grip

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and it's going to reference the variable that we said earlier

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but in our Linux environment, it doesn't recognize part.

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So we're going to have to actually type out the dev sda1.

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Okay.

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So what we see is just going to

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select the specific partition that we're looking for

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next going to add the awk command

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and remember that extracts the data

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in the fifth column from the results.

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So, let's check that out really quick.

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Okay. Since we have it up there

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it's easier to see the fifth columns going to be percentages.

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So it's just going to only take that value

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and next we going to use the cut command

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and we're going to reference the percent side

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and we're going to just remove it.

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So we're able to manipulate that variable only

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with the number itself.

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So the percentage side won't get in the way.

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So it's going to be cut.

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All right.

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So now we only pull the number

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from the, disk free command

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specific to the dev sda1 partition

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from the fifth column, which is the percentage

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and we're going to remove the percent sign

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and that's going to echo

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partition was going to reference dev sda1.

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We're going to reference the command that we just created.

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Add the percentage sign.

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Okay.

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So we'll see this command is just letting us know that

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we're going to spit out to the screen

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or a document

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that the partition dev sda1

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is

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and we going to run that command that we just went through

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add a percent sign to that value,

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which should be 25 full.

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So 25% full.

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Dune's going to let everyone know who's using this

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that the script is complete.

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Click save.

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I should better run this bad boy.

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Okay.

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So it went through successfully.

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It printed out everything that we put inside

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of our check storage

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that sh, echo beginning storage

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echo the date, echo the device, the percent full.

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We going to let the user know that

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the storage check is now complete.

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So now we're going to modify this script

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and we are just going to

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now redirect the information

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to a file.

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So this is a command,

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that's exactly what it does.

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It's the same telling us,

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hey, from this point on

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we're going to send everything into your home directory,

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under a file called storage_report.txt

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So let's also modify this last statement

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to let the user know that as well.

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Now last thing we must do,

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we going to add this piece right here.

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And that's going to let the system know

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that we going to send that last echo to the screen.

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Because it doesn't really need to be part of report.

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That's to let the person know,

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that is running the command

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where the information will be stored.

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Okay.

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Now let's save this.

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Now let's run that command one more time.

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Okay.

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So we see it went through.

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It's letting us know that it saved to the storage report

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For those of you yeah.

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Okay.

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Looks like it went through successfully.

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Okay.

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We just walked through the basics of creating

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a small script of how to redirect the information to

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your report file

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or just keeping it on a screen

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for the user to see the information,

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and see the steps it's going through.

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But remember the script does what you tell it to do.

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So if you want to let the user know

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every step that's going through,

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that will be very helpful for whoever's using it.

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Thank you for sticking with this walkthrough.

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And I will see you in the next lesson.