FAQ: Redirection - sed

This community-built FAQ covers the “sed” exercise from the lesson “Redirection”.

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This exercise can be found in the following Codecademy content:

Web Development

Learn the Command Line

FAQs on the exercise sed

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When I followed the steps to substitute “snow” for “rain” in this exercise, it printed the changes to the terminal each time, but did not actually change the document forests.txt. So when I did the final step and used “cat forests.txt”, none of the instances of “snow” had been replaced with “rain”.

How do I make the substitutions permanent in forests.txt?

Welcome back to the forums!

You can use the -i option to edit a file permanently.

See here for more information.

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Thank you! That is helpful.

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