Learn by doing
Ubuntu:
https://killercoda.com/playgrounds/scenario/ubuntu
k8s:
https://killercoda.com/playgrounds/scenario/kubernetes
41、DeepCode - http://deepcode.ai
42、10Web - http://10web.io
43、Akkio - http://akkio.com
44、Replit - http://replit.com
45、Durable AI - http://durable.ai