Installation pip3
ubuntu 19.10 has no python, and is substituted python3.
to perform sudo apt install python3-pipthe installation pip3
Installation jupyter
carried outsudo pip3 install jupyter
Run jupyter notebook
Under ordinary users execute jupyter notebook
if performed in the root, will be reported
[C 14:36:09.951 NotebookApp] Running as root is not recommended. Use --allow-root to bypass.