$ jupyter notebook
Traceback (most recent call last):
File "/anaconda3/bin/jupyter-notebook", line 11, in
sys.exit(main())
File "/anaconda3/lib/python3.7/site-packages/jupyter_core/application.py", line 266, in launch_instance
return super(JupyterApp, cls).launch_instance(argv=argv, **kwargs)
File "/anaconda3/lib/python3.7/site-packages/traitlets/config/application.py", line 657, in launch_instance
app.initialize(argv)
File "", line 2, in initialize
File "/anaconda3/lib/python3.7/site-packages/traitlets/config/application.py", line 87, in catch_config_error
return method(app, *args, **kwargs)
File "/anaconda3/lib/python3.7/site-packages/notebook/notebookapp.py", line 1602, in initialize
self.init_webapp()
File "/anaconda3/lib/python3.7/site-packages/notebook/notebookapp.py", line 1381, in init_webapp
self.http_server.listen(port, self.ip)
File "/anaconda3/lib/python3.7/site-packages/tornado/tcpserver.py", line 143, in listen
sockets = bind_sockets(port, address=address)
File "/anaconda3/lib/python3.7/site-packages/tornado/netutil.py", line 168, in bind_sockets
sock.bind(sockaddr)
OSError: [Errno 49] Can't assign requested address
Short Answer
$ jupyter notebook --ip=127.0.0.1
PORT 8888
You can also explore what you are already running on PORT 8888
$ lsof | grep 8888Skype 407 uki txt REG 1,5