Install unzip

sudo apt-get install unzip

Download last version of ChromeDriver and unzip it

wget -N http://chromedriver.storage.googleapis.com/2.9/chromedriver_linux64.zip -P ~/Downloads

unzip ~/Downloads/chromedriver_linux64.zip -d ~/Downloads

Make it executable and move to /usr/local/share

chmod +x ~/Downloads/chromedriver

sudo mv -f ~/Downloads/chromedriver /usr/local/share/chromedriver

Create symbolic links

sudo ln -s /usr/local/share/chromedriver /usr/local/bin/chromedriver

sudo ln -s /usr/local/share/chromedriver /usr/bin/chromedriver