How can I display line numbers in Jupyter notebook code cells by default?

[Keir Lockridge]

There is probably a global configuration file for the Jupyter notebook where this setting can be changed, but I'm not sure where it is.

In a code cell in the Jupyter notebook, line numbers may be turned on by typing ESC-L. This effect seems to be temporary (when I save the notebook and reload it, the line numbers disappear). I am wondering if there is some way to have the notebook display line numbers by default.

Thanks --

Keir

[Harald Schilly]

Good question, I just did this and it worked:
http://stackoverflow.com/a/29916445/54236

use jupyter --config-dir to get the config dir, which should be
~/.jupyter in SMC and hence it's the file ~/.jupyter/custom/custom.js
where you have to put that startup code in.

-- harald

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[Keir Lockridge]

Thanks! It worked for me as well.

--Keir