To install node in Ubuntu click here
For other platforms click here
npm install node-inspector (and optional npm install v8-profiler) will install
the node-inspector module,
perfect for step-by-step debug of node.js programs
Now run node-inspector & and start your node app as node --debug-brk app.js; open
the page http://127.0.0.1:8080/debug?port=5858 on a webkit-based browser
and see the magic.
If you want, you can use my nodebug that launch node-inspector, the application and google chrome in debug mode