I've renewed my subscription with O'Reilly Online Learning. A subscription would set you back at US$399 per year. I got their Cyber Monday promo so I got it for $200 off. Before they only have online access to technical books but now they are now offering video courses and sandboxes!
I was looking for something to read and I just discovered these new features. I think they call them Interactive Sandboxes.
They have now have sandboxes for Ubuntu, Kubernetes, Python and TensorFlow. Below are some screenshots I took.
Disclaimer: I am not paid by O'Reilly for this post. Just wanted to share since these new features can be useful for learning while reading a technical book without having to bring up an environment to code in.