FAQ: Redirection - Review

Frequently Asked Questions Command Line FAQ
1

Community%20FAQs%20on%20Codecademy%20Exercises
Community%20FAQs%20on%20Codecademy%20Exercises1000×208 141 KB

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

Paths and Courses
This exercise can be found in the following Codecademy content:

Web Development

Learn the Command Line

FAQs on the exercise Review

There are currently no frequently asked questions associated with this exercise – that’s where you come in! You can contribute to this section by offering your own questions, answers, or clarifications on this exercise. Ask or answer a question by clicking reply (reply) below.

If you’ve had an “aha” moment about the concepts, formatting, syntax, or anything else with this exercise, consider sharing those insights! Teaching others and answering their questions is one of the best ways to learn and stay sharp.

Join the Discussion. Help a fellow learner on their journey.

Ask or answer a question about this exercise by clicking reply (reply) below!
You can also find further discussion and get answers to your questions over in Language Help.

Agree with a comment or answer? Like (like) to up-vote the contribution!

Need broader help or resources? Head to Language Help and Tips and Resources. If you are wanting feedback or inspiration for a project, check out Projects.

Looking for motivation to keep learning? Join our wider discussions in Community

Learn more about how to use this guide.

Found a bug? Report it online, or post in Bug Reporting

Have a question about your account or billing? Reach out to our customer support team!

None of the above? Find out where to ask other questions here!

2

Can anyone provide further explanation on the ‘<’

for example you can just do cat forests.txt but you could also do cat < forests.txt

3

I second oakzd. I found no distinct and detailed explanation with examples about using < symbol in command line. Where is it used, what is it for, in what cases it is necessary?

4

Hello,
Can anyone help me understand the difference between using a sed command as is it and using sed -i ?

5

sed just shows the output in the terminal, sed -i overwrites/changes the actual file.

(It might be a bit easier to visualize if you make a random .txt file on your computer and actually try to do it, then open the file and view the results.)