install opera/chrome browser on ubuntu

Environment: ubuntu 9.10

opera:
1. add source list in your /etc/apt/sources.list file:
sudo gedit /etc/apt/sources.list
add
deb http://deb.opera.com/opera/ stable non-free

2. import GPG package signing key
wget -O - http://deb.opera.com/archive.key | sudo apt-key add -
3. update & install
sudo apt-get update
sudo apt-get install opera



google chrome:
1. add source list in your /etc/apt/sources.list file:
sudo gedit /etc/apt/sources.list
add
deb http://ppa.launchpad.net/chromium-daily/ppa/ubuntu karmic main
deb-src http://ppa.launchpad.net/chromium-daily/ppa/ubuntu karmic main

2. import GPG package signing key
(for karmic user) sudo add-apt-key ppa:chromium-daily/ppa  
(for lucid user)sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 0xfbef0d696de1c72ba5a835fe5a9bf3bb4e5e17b5

3. update & install
sudo apt-get update
sudo apt-get install chromium-browser