I added the chromedriver path and still receive this error when i load chromedriver via selenium.
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pry(main)> browser=Watir::Browser.new(:chrome)
Selenium::WebDriver::Error::WebDriverError: Unable to find chromedriver. Please download the server from <http://chromedriver.storage.googleapis.com/index.html> and place it somewhere on your PATH. More info at <https://github.com/SeleniumHQ/selenium/wiki/ChromeDriver>.
from /home/roberto/.rvm/gems/ruby-2.4.1/gems/selenium-webdriver-3.12.0/lib/selenium/webdriver/common/service.rb:57:in `binary\_path'

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so i already have the chromedriver and i can access it via cmd direct but not via selenium using ruby 

what i missing here.. can someone highlight it ?