How to install Google Chrome in Ubuntu

First add the signing key and the repository:

wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | sudo apt-key add -
sudo sh -c 'echo "deb http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list'
sudo apt-get update

Then to install the stable release:

sudo apt-get install google-chrome-stable

If you want to instal the unstable release:

sudo apt-get install google-chrome-unstable

And for the beta version:

sudo apt-get install google-chrome-beta

To uninstall Chromium:

sudo apt-get remove chromium-browser

Source: http://www.howopensource.com/2011/10/install-google-chrome-in-ubuntu-11-10-11-04-10-10-10-04/