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Today, we will talk about the environment variables in cowardliness, environment variable is like

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a variable in any programming language that we can set to a value and use it any time in our terminal

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when we need it, when we open a terminal window.

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A new batch process will be created and which it has its own environment variable.

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If we want to create a new environment variable, we simply use the export command.

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Let us try to create an environment variable that holds our Kelly Linux IP address, and we will name

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it DSD IP.

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Let's check if our variable is created by using the echo and calling our variable with a dollar sign.

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Perfect.

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Now let's ping our own local IP using this new variable.

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Notice this environment battle will be only available in the terminal window, but if we are open another

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one, this variable will be gone.

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If we want to make it through old shells, we must add it to the up to the our dot Benghazi.

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Or if you're using the Z shell, then we add it to the dot Z S.H., our C file, the dot Benghazi or

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the Dot S.H. Z.

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S HRC should be located in the home directory of your user.

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If it's not found then simply created using the touch command.

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But before we do that, let's open another shell and see if we can call the same variable we just created.

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As you can see, there was no output from the command simply because the variable we created in the

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other terminal, not this one.

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Now let's open our DOD Benghazi file and add the export line to it.

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Now, let's open another Besch window and see if we can use this variable.

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Perfect, we were able to use the variable we just added to our Dubash RC file, and since this file

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is loaded, every time the user logs into the system, all the environment variables in the file were

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loaded as well.

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Now, we have reached the end of this lesson.

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Thank you.

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And see you in the next one.