Matplotlib cannot find basic fonts
To get it to work, I had to combine the two current top answers. Here's what worked for me:
$ sudo apt install msttcorefonts -qq$ rm ~/.cache/matplotlib -rf
I had this exact same problem on a Vagrant VM running Ubuntu Xenial 64-bit. No matter how many fonts I had already installed, matplotlib was having a problem with the "system" font name "sans-serif". I fixed it by:
- Stopping Jupyter
- Installing font-manager:
sudo apt install font-manager - Cleaning the matplotlib cache directory:
rm ~/.cache/matplotlib -fr - Restarting Jupyter.
No more error messages about sans-serif.