title: jupyter: no kernel available
body: <p>Could someone please advise on why I am <em>not</em> getting the option to choose <em>python3</em> as a kernel ?</p>
  
  <pre><code># python3 -m ipykernel install --user
  Installed kernelspec python3 in /root/.local/share/jupyter/kernels/python3
  
  # python3 -m pip install ipykernel
  Requirement already satisfied: ipykernel in /usr/lib/python3.4/site-packages
  Requirement already satisfied: tornado&gt;=4.0 in /usr/lib64/python3.4/site-packages (from ipykernel)
  Requirement already satisfied: ipython&gt;=4.0.0 in /usr/lib/python3.4/site-packages (from ipykernel)
  Requirement already satisfied: jupyter-client in /usr/lib/python3.4/site-packages (from ipykernel)
  Requirement already satisfied: traitlets&gt;=4.1.0 in /usr/lib/python3.4/site-packages (from ipykernel)
  Requirement already satisfied: backports_abc&gt;=0.4 in /usr/lib/python3.4/site-packages (from tornado&gt;=4.0-&gt;ipykernel)
  Requirement already satisfied: pexpect; sys_platform != "win32" in /usr/lib/python3.4/site-packages (from ipython&gt;=4.0.0-&gt;ipykernel)
  Requirement already satisfied: pickleshare in /usr/lib/python3.4/site-packages (from ipython&gt;=4.0.0-&gt;ipykernel)
  Requirement already satisfied: decorator in /usr/lib/python3.4/site-packages (from ipython&gt;=4.0.0-&gt;ipykernel)
  Requirement already satisfied: pygments in /usr/lib64/python3.4/site-packages (from ipython&gt;=4.0.0-&gt;ipykernel)
  Requirement already satisfied: setuptools&gt;=18.5 in /usr/lib/python3.4/site-packages (from ipython&gt;=4.0.0-&gt;ipykernel)
  Requirement already satisfied: simplegeneric&gt;0.8 in /usr/lib/python3.4/site-packages (from ipython&gt;=4.0.0-&gt;ipykernel)
  Requirement already satisfied: prompt-toolkit&lt;2.0.0,&gt;=1.0.3 in /usr/lib/python3.4/site-packages (from ipython&gt;=4.0.0-&gt;ipykernel)
  Requirement already satisfied: jupyter-core in /usr/lib/python3.4/site-packages (from jupyter-client-&gt;ipykernel)
  Requirement already satisfied: pyzmq&gt;=13 in /usr/lib64/python3.4/site-packages (from jupyter-client-&gt;ipykernel)
  Requirement already satisfied: ipython-genutils in /usr/lib/python3.4/site-packages (from traitlets&gt;=4.1.0-&gt;ipykernel)
  Requirement already satisfied: six in /usr/lib/python3.4/site-packages (from traitlets&gt;=4.1.0-&gt;ipykernel)
  Requirement already satisfied: ptyprocess&gt;=0.5 in /usr/lib/python3.4/site-packages (from pexpect; sys_platform != "win32"-&gt;ipython&gt;=4.0.0-&gt;ipykernel)
  Requirement already satisfied: wcwidth in /usr/lib/python3.4/site-packages (from prompt-toolkit&lt;2.0.0,&gt;=1.0.3-&gt;ipython&gt;=4.0.0-&gt;ipykernel)
  </code></pre>
  
  <p>From the command-line I can see indeed that the python3 kernel is installed</p>
  
  <pre><code># jupyter kernelspec list
  [ListKernelSpecs] WARNING | Native kernel (python2) is not available
  [ListKernelSpecs] WARNING | Native kernel (python2) is not available
  Available kernels:
    python3    /root/.local/share/jupyter/kernels/python3
  </code></pre>
  
  <p>But jupyter does not to be able to understand it:
  <a href="https://i.stack.imgur.com/uTjTg.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/uTjTg.png" alt="enter image description here"></a>
  Could someone please advise on how to resolved this issue?</p>