There's a very good exercise on Codecrafters (https://app.codecrafters.io/courses/shell/overview https://app.codecrafters.io/courses/shell/overview) to walk you

There's a very good exercise on Codecrafters (https://app.codecrafters.io/courses/shell/overview https://app.codecrafters.io/courses/shell/overview) to walk you through writing your own shell. I found it enlightening, as well as a good way to learn a new language.