jupyter notebook can not start - jupyter-notebook

Question

I usually command with 'jupyter notebook' to start the jupyter notebook .
Traceback (most recent call last): File
"/home/jake/venv/bin/jupyter-notebook", line 8, in
sys.exit(main()) File "/home/jake/venv/lib/python3.7/site-packages/jupyter_core/application.py",
line 268, in launch_instance
return super(JupyterApp, cls).launch_instance(argv=argv, **kwargs) File
"/home/jake/venv/lib/python3.7/site-packages/traitlets/config/application.py",
line 663, in launch_instance
app.initialize(argv) File "",
line 2, in initialize File
"/home/jake/venv/lib/python3.7/site-packages/traitlets/config/application.py",
line 87, in catch_config_error
return method(app, *args, **kwargs) File "/home/jake/venv/lib/python3.7/site-packages/notebook/notebookapp.py",
line 1720, in initialize
self.init_webapp() File "/home/jake/venv/lib/python3.7/site-packages/notebook/notebookapp.py",
line 1482, in init_webapp
self.http_server.listen(port, self.ip) File "/home/jake/venv/lib/python3.7/site-packages/tornado/tcpserver.py",
line 151, in listen
sockets = bind_sockets(port, address=address) File "/home/jake/venv/lib/python3.7/site-packages/tornado/netutil.py", line
174, in bind_sockets
sock.bind(sockaddr) OSError: [Errno 99] Cannot assign requested address
but this message is showed up

Answer 1

Go to /etc/hosts and check that the local host has the ip 127.0.0.1
How to go to the hosts file? If you are using Linux, open up terminal, type
cd /etc/
Then type
cat hosts
This will display the contents in hosts. Now you will see localhosts there. Change its value to 127.0.0.1 if it already isn't. And that should get your notebook running.
If you find that localhost is already 127.0.0.1, then try the command in your terminal:
jupyter notebook --ip=0.0.0.0 --port=8080
to run the jupyter notebook.
The second one is an immediate fix, but every time you want to start jupyter notebook, you will have to provide those two arguments. On the other hand, the first one is a permanent fix (recommended) and you just have to type "jupyter notebook" the next time.