I am using selenium with python and have downloaded the chromedriver for my windows computer from this site: http://chromedriver.storage.googleapis.com/index.html?path=2.15/
When you unzip chromedriver, please do specify an exact location so that you can trace it later. Below, you are getting the right chromedriver for your OS, and then unzipping it to an exact location, which could be provided as argument later on in your code.
wget http://chromedriver.storage.googleapis.com/2.10/chromedriver_linux64.zip
unzip chromedriver_linux64.zip -d /home/virtualenv/python2.7.9/