install truffle and ganache Truffle use to compile, deploy Solidity source code Ganache use to testing

npm install -g truffle
npm install -g ganache-cli

Initial truffle into a project folder

mkdir truffle-demo
truffle init

Config truffle-config.js as below

module.exports = {
  networks: {
    development: {
      host: '127.0.0.1',
      port: 8545,
      network_id: '*' // match any netwrok id
    }
  }
};

Write a smart contract

truffle create contract HelloWorld

Write a migration, to deploy on blockchain

truffle create migration deploy_hello_world
truffle migrate

truffle compile

truffle create test HelloWorld
geneche-cli