Incorrect submission thrown for exploration

[hugobowne]

If this has already been discussed, feel free to close.

In many exercises, I want to see where I am (pwd) or explore a little bit (ls). Sometime it is helpful to see where I am to solve the challenge, such as here: https://campus.datacamp.com/courses/introduction-to-shell-for-data-science/manipulating-files-and-directories?ex=11

however, when I execute pwd, I am told I am making an incorrect submission. But I'm not even trying to make a submission. This is proving very frustrating for me. However, it may be a result of expectations set from Python/R courses on DC.