Error “Unable to open Jupyter Notebook: Port 8888 is already in use”

Question

I am getting following error when I run Jupyter Notebook:

(base) C:\\Users\\ramne>jupyter notebook
[I 01:19:00.648 NotebookApp] The port 8888 is already i         


        

Answer 1

The port 8888 is used almost exclusively by Jupyter, and the fact that it's in use indicates more than anything that you have another Jupyter session already running. I'm 99% certain you can just kill the task that's using it, or you can run

jupyter notebook list

to see current notebooks. And as mentioned in the other answer you can run

jupyter notebook --port 8889

To run on a different port instead (replace 8889 by any other number you'd like).