How do I create the file?

You can create the file usernames.txt using the terminal. Here are a couple of methods:

Using touch Command

Open your terminal and run the following command:

touch /home/labex/project/usernames.txt

Using a Text Editor

You can also create and edit the file using a text editor like nano or vim. For example, using nano:

nano /home/labex/project/usernames.txt

This will open the usernames.txt file in the Nano text editor. You can then add your content and save the file by pressing CTRL + O, followed by Enter, and exit with CTRL + X.

Choose the method that you prefer!