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2020-01-28 18:33:49 +0200 commented answer Notebook access from remote computer does not work

You could try the ssh solution stated here: (

2020-01-17 00:23:43 +0200 commented question "UserWarning: Matplotlib is building the font cache using fc-list." never resolves

I experienced the same problem. I first tried to upgrade matplotlib by launching the sagemath shell running pip install --upgrade matplotlib. Then I use the following command to try the plotting function P = matrix_plot(matrix(2,[1,1,3,3])) and then P. If for the first time the console hangs at the message "Matplotlib is building the font cache using fc-list.", then press ctrl+c to break it and try the plot function again. Since I cannot replicate the problem now I am not sure if this is the solution to the problem. Good luck.