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Once again, we're at the end of the lesson, time for a lap.

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In this lesson, write a shell script that rewrites filenames to the filename in uppercase.

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And the script must meet the following requirements.

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The filename should be provided as an argument while running the script.

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And if no argument was provided, the script should print an error message.

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Do not use existing files, but use the touch command to create some dummy files before

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running the script.

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The purpose here is that you are not going to mess up the contents of your etc directory

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or any other important files.

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So just to be clear, the script shouldn't be creating the files, but before running

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the script, you use touch file 1 and then you run the script to convert it to uppercase.

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Good luck with that.