How can I remove a kernel from jupyter notebook?
I have R kernel on my jupyter notebook. Recently kernel always dies right after I open a new notebook.
This question is related to
r
jupyter-notebook
Run jupyter kernelspec list to get the paths of all your kernels.
Then simply uninstall your unwanted-kernel
jupyter kernelspec uninstall unwanted-kernel
Old answer
Delete the folder corresponding to the kernel you want to remove.
The docs has a list of the common paths for kernels to be stored in: http://jupyter-client.readthedocs.io/en/latest/kernels.html#kernelspecs
In jupyter notebook run:
!echo y | jupyter kernelspec uninstall unwanted-kernel
In anaconda prompt run:
jupyter kernelspec uninstall unwanted-kernel
jupyter kernelspec remove now exists, see #7934.
So you can just.
# List all kernels and grap the name of the kernel you want to remove
jupyter kernelspec list
# Remove it
jupyter kernelspec remove <kernel_name>
That's it.
Just for completeness, you can get a list of kernels with jupyter kernelspec list, but I ran into a case where one of the kernels did not show up in this list. You can find all kernel names by opening a Jupyter notebook and selecting Kernel -> Change kernel. If you do not see everything in this list when you run jupyter kernelspec list, try looking in common Jupyter folders:
ls ~/.local/share/jupyter/kernels # usually where local kernels go
ls /usr/local/share/jupyter/kernels # usually where system-wide kernels go
ls /usr/share/jupyter/kernels # also where system-wide kernels can go
Also, you can delete a kernel with jupyter kernelspec remove or jupyter kernelspec uninstall. The latter is an alias for remove. From the in-line help text for the command:
uninstall
Alias for remove
remove
Remove one or more Jupyter kernelspecs by name.
There two ways, what I found either go to the directory where kernels are residing and delete from there. Secondly, using this command below
List all kernels and grap the name of the kernel you want to remove
jupyter kernelspec list
to get the paths of all your kernels.
Then simply uninstall your unwanted-kernel
jupyter kernelspec remove kernel_name
If you are doing this for virtualenv, the kernels in inactive environments might not be shown with jupyter kernelspec list, as suggested above. You can delete it from directory:
~/.local/share/jupyter/kernels/
You can delete it in the terminal via:
jupyter kernelspec uninstall yourKernel
where yourKernel is the name of the kernel you want to delete.
Source: Stackoverflow.com