HTML5 Tutorials - an introduction
Get productive in HTML5 app development with these tutorials that guide you through creating an app with step-by-step procedures and explanations of key points:
If you want to create pure HTML5 apps running on Ubuntu:
If you want to develop a Cordova app, targeting Ubuntu, and which can also be cross-platform, check out the Cordova tutorial:
Also be sure to check out the example apps. These provide app source trees with targeted discussion of critical coding points:
When you are ready, read about how to ensure your new HTML5 application is a quality one: