In the Man challenge, you might potentially get the error message:
Uname option to print kernel version doesn't contain the right answer, try again!
This means you likely entered the incorrect response and you need to try something different.
This is your journey, you will need to own it. The application is rigorous and needs a lot of research.
These resources come in handy
Error accumulations count towards your final score. Try not to enter the same wrong answer twice!