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I've installed Jupyter Notebook on AWS (Ubuntu 14.04). The notebook runs, however, does not connect to kernels:

kernel

The shell output:

[I 15:00:22.857 NotebookApp] Kernel interrupted: 805928a8-674d-458f-b990-d86bd3c26711
[I 15:01:24.459 NotebookApp] Saving file at /Notebooks/R Example.ipynb
[I 15:01:37.533 NotebookApp] Creating new notebook in /Notebooks
[W 15:01:38.626 NotebookApp] 404 GET /nbextensions/nbpresent/js/nbpresent.deps.min.js.js (35.211.41.196) 1.86ms referer=https://22.133.12.196:8888/notebooks/Notebooks/Untitled.ipynb?kernel_name=python3
[I 15:01:38.656 NotebookApp] Kernel started: 0a9a882e-1e55-4913-8640-8213c1aae88f
[I 15:01:58.721 NotebookApp] Kernel restarted: 0a9a882e-1e55-4913-8640-8213c1aae88f

What may the cause?

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2 Answers 2

Reset to default
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Changed Browser from Safari to Chrome and everything worked fine. Read in other posts, that Safari don't like my self made certificate.

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  • Q: What may the cause? A: Safari does not 'like' self made certificate.
    – mrtaste
    Commented Jun 16, 2017 at 7:29
  • Confirmed that this solution works. The kernel connects after changing from Safari to Chrome or Firefox.
    – Scott
    Commented Aug 30, 2017 at 16:57
  • After hours of looking around, this has something to do with the websockets. All notebooks have some sort of websockets that connect to a backend service. If you are using a load balancer in front of your notebook server, make sure to use TCP instead of HTTP/HTTPS.
    – deppfx
    Commented Aug 30, 2018 at 21:28
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It is possible to add the missing Python kernel in Jupyter Notebook in Ubuntu 14.04 with ipykernel.

Jupyter Notebook on my Ubuntu runs only Python 3 by default. If you're running Jupyter on Python 3, you can set up a Python 2 kernel like this:

python2 -m pip install ipykernel
python2 -m ipykernel install --user

Start the notebook server from the terminal:

jupyter notebook

You should see Jupyter Notebook open in your web browser. If you're running Jupyter on Python 2, you can set up a Python 3 kernel like this:

python3 -m pip install ipykernel
python3 -m ipykernel install --user

After you have done this, you will get to choose between either of the two kernels in the Jupyter Notebook interface.

Ubuntu 20.04 and later

Open the terminal and type:

sudo apt install python3-notebook jupyter jupyter-core

Ubuntu 18.04-19.10

Open the terminal and type:

sudo apt install python3-notebook jupyter jupyter-core python-ipykernel

To start the notebook server run the following command:

jupyter notebook

You should see Jupyter Notebook open in your web browser.

Alternatively you can use Google Colaboratory instead of Jupyter Notebook. Google Colaboratory is Google's free Jupyter notebook environment that requires no setup and runs entirely in the cloud.

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