sudo add-apt-repository ppa:webupd8team/java

sudo apt-get update

sudo apt-get install oracle-java8-installer

- curl -sL https://deb.nodesource.com/setup_6.x | sudo -E bash -
- sudo apt-get install jq nodejs curl -qy
- npm install -g geckodriver
- npm install -g chromedriver

npm install -g protractor
webdriver-manager update  -- Update webdriver
webdriver-manager start -- Execute selenium server

exports.config = {
  seleniumAddress: 'http://localhost:4444/wd/hub',
  specs: ['todo-spec.js']
};

protractor conf.js

http://www.protractortest.org/#/api?view=webdriver.By.css

References:

https://github.com/angular/protractor/blob/master/docs/tutorial.md