How can I install the Opera browser on Ubuntu?

sudo bash -c 'echo "deb http://deb.opera.com/opera/ stable non-free" > /etc/apt/sources.list.d/opera.list'
sudo apt-get install debian-archive-keyring
wget -O - http://deb.opera.com/archive.key | sudo apt-key add -
sudo apt-get update
sudo apt-get install opera