This turorial shows how to install Chromium browser quickly with three commands in Ubuntu 10.04 (Lucid) by adding the PPA.

Open terminal from Applications->Accessories menu,execute following commands:

sudo add-apt-repository ppa:chromium-daily/ppa
sudo apt-get update
sudo apt-get install chromium-browser

this also works in Ubuntu 9.10 and Ubuntu 10.10 (Maverick).Launch Google Chrome from Applications->Internet menu.

In addition,if you’re using Ubuntu 9.04 or earlier,you can install Google Chrome by:
edit /etc/apt/sources.list:

gksudo gedit /etc/apt/sources.list

add the following lines and save the file:

deb http://ppa.launchpad.net/chromium-daily/ppa/ubuntu YOUR_UBUNTU_VERSION_HERE main 
deb-src http://ppa.launchpad.net/chromium-daily/ppa/ubuntu YOUR_UBUNTU_VERSION_HERE main 

replace “YOUR_UBUNTU_VERSION_HERE” with jaunty or hardy

add gpg key:

sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 4E5E17B5

update system and install Google Chrome:

sudo apt-get update
sudo apt-get install chromium-browser

PPA for Ubuntu Chromium:https://launchpad.net/~chromium-daily/+archive/ppa