Truffle is a development environment (providing a command-line tool to compile, deploy, test, and build), framework (providing various packages to make it easy to write tests, deployment code, build clients, and so on) and asset pipeline (publishing packages and using packages published by others) to build ethereum-based DApps.
Truffle works on OS X, Linux, and Windows. Truffle requires you to have Node.js version 5.0+ installed. At the time of writing this, the latest stable version of truffle is 3.1.2, and we will be using this version. To install truffle, you just need to run this command:
npm install -g truffle
Before we go ahead, make sure you are running testrpc with network ID 10. The reason is the same as the one discussed earlier.