How to close IPython Notebook properly?

Try killing the pythonw process from the Task Manager (if Windows) if nothing else works.

Linux (Ubuntu 14.04)

As mentioned, try to kill ipython notebook processes properly by first going to the “running” tab in your ipynb/jupyter browser session, and then check open terminals on your console and shut down with ctrl-c. The latter should be avoided if possible.

If you run an ipython notebook list and continue to see running ipython servers at different ports, make note of which ports the existing notebooks are being served to. Then shut down your TCP ports:

fuser -k 'port#'/tcp 

I’m not sure if there are other risks involved with doing this. If so, let me know.

If you run jupyter in the background like me:

jupyter notebook &> /dev/null &

Then to exit jupyter completely, instead of Ctl-C, make an alias command:

echo 'alias quitjupyter="kill $(pgrep jupyter)"' >> ~/.bashrc

Restart your terminal. Kill all jupyter instances:

quitjupyter

Note: use double quotes inside of single quotes as shown above. The other way around will evaluate the expression before writing it to your .bashrc (you want to write the command itself not ‘kill 1430’ or whatever process number may be associated with a current jupyter instance). Of course you can use any alias you wish. I actually use ‘qjup’:

echo 'alias qjup="kill $(pgrep jupyter)"' >> ~/.bashrc

Restart your terminal. Kill all jupyter instances:

qjup

In the browser session you can also go to Kernel and then click Restart and Clear Output.

Environment

My OS is Ubuntu 16.04 and jupyter is 4.3.0.

Method

First, i logged out jupyter at its homepage on browser(the logout button is at top-right)

Second, type in Ctrl + C in your terminal and it shows:

[I 15:59:48.407 NotebookApp]interrupted Serving notebooks from local
directory: /home/Username 0 active kernels

The Jupyter Notebook is running at:
http://localhost:8888/?token=a572c743dfb73eee28538f9a181bf4d9ad412b19fbb96c82

Shutdown this notebook server (y/[n])?

Last step, type in y within 5 sec, and if it shows:

[C 15:59:50.407 NotebookApp] Shutdown confirmed
[I 15:59:50.408
NotebookApp] Shutting down kernels

Congrats! You close your jupyter successfully.

Actually, I believe there’s a cleaner way than killing the process(es) using kill or task manager.

In the Jupyter Notebook Dashboard (the browser interface you see when you first launch ‘jupyter notebook’), browse to the location of notebook files you have closed in the browser, but whose kernels may still be running.

iPython Notebook files appear with a book icon, shown in green if it has a running kernel, or gray if the kernel is not running.

Just select the tick box next to the running file, then click on the Shutdown button that appears above it.

This will properly shut down the kernel associated with that specific notebook.

I think accepted answer outdated and is not valid anymore.

You can terminate jupyter notebook from web interface on file menü item.

When you move Mouse cursor on “close and halt”, you will see following explanation.

And when you click “close and halt”, you will see following message on terminal screen.

I am copy pasting from the Jupyter/IPython Notebook Quick Start
Guide Documentation, released on Feb 13, 2018.
http://jupyter-notebook-beginner-guide.readthedocs.io/en/latest/execute.html

1.3.3 Close a notebook: kernel shut down
When a notebook is opened, its “computational engine” (called the kernel) is automatically started. Closing the
notebook browser tab, will not shut down the kernel, instead the kernel will keep running until is explicitly shut down.
To shut down a kernel, go to the associated notebook and click on menu File -> Close and Halt. Alternatively, the
Notebook Dashboard has a tab named Running that shows all the running notebooks (i.e. kernels) and allows shutting
them down (by clicking on a Shutdown button).

Summary: First close and halt the notebooks running.

1.3.2 Shut down the Jupyter Notebook App
Closing the browser (or the tab) will not close the Jupyter Notebook App. To completely shut it down you need to
close the associated terminal.
In more detail, the Jupyter Notebook App is a server that appears in your browser at a default address
(http://localhost:8888). Closing the browser will not shut down the server. You can reopen the previous address
and the Jupyter Notebook App will be redisplayed.
You can run many copies of the Jupyter Notebook App and they will show up at a similar address (only the number
after “:”, which is the port, will increment for each new copy). Since with a single Jupyter Notebook App you can
already open many notebooks, we do not recommend running multiple copies of Jupyter
Notebook App.

Summary: Second, quit the terminal from which you fired Jupyter.

First step is to save all open notebooks. And then think about shutting down your running Jupyter Notebook. You can use this simple command:

$ jupyter notebook stop 
Shutting down server on port 8888 ...

Which also takes the port number as argument and you can shut down the jupyter notebook gracefully.

For eg:

jupyter notebook stop 8889 
Shutting down server on port 8889 ...

Additionally to know your current jupyter instance running, check below command:

shell> jupyter notebook list 
Currently running servers:
http://localhost:8888/?token=ef12021898c435f865ec706de98632 :: /Users/username/jupyter-notebooks [/code]

These commands worked for me:

jupyter notebook list # shows the running notebooks and their port-numbers
                      # (for instance: 8080)
lsof -n -i4TCP:[port-number] # shows PID.
kill -9 [PID] # kill the process.

This answer was adapted from here.

Step 1 – On shell just do control+z (control+c)
Step 2 _ close the web browser

Option 1

Open a different console and run

jupyter notebook stop [PORT]

The default [PORT] is 8888, so, assuming that Jupyter Notebooks is running on port 8888, just run

jupyter notebook stop

If it is on port 9000, then

jupyter notebook stop 9000

Option 2 (Source)

1. Check runtime folder location

   jupyter --paths
   

2. Remove all files in the runtime folder

   rm -r [RUNTIME FOLDER PATH]/*
   

3. Use top to find any Jupyter Notebook running processes left and if so kill their PID.

   top | grep jupyter &
   kill [PID]
   

One can boilt it down to

TARGET_PORT=8888
kill -9 $(lsof -n -i4TCP:$TARGET_PORT | cut -f 2 -d " ")

Note: If one wants to launch one’s Notebook on a specific IP/Port

jupyter notebook --ip=[ADD_IP] --port=[ADD_PORT] --allow-root &

The best way now is to use the "Quit" button that is just to the left of the "Logout" button. I have to admit that I do not understand the utility of the Logout button. However, I am glad that they have added the exceedingly useful Quit button.

If you are on mac and using Jupyter lab you can do the following in terminal

jupyter list

Above will give you all the running servers. Once you get to know the post just use jupyter lab stop. For example if the server was running on 8888 just execute

jupyter lab stop 8888