Code not getting saved in jupyter notebook

Every time I log into the jetson nano kit I need to start my coding from scratch as the codes do not get saved in the Jupyter environment which opens. I need to install “sudo”, “pip” and everything else before actually starting to code every single time. Is there any way to permanently save the notebook and all my progress?

Hi,
Do you run it like this:
How to Install Jupyter Lab on JP4.4