install opera with ppa ubuntu

Setup key with:

wget -O - http://deb.opera.com/archive.key | sudo apt-key add -

Setup repository with:

sudo sh -c 'echo "deb http://deb.opera.com/opera-stable/ stable non-free" >> /etc/apt/sources.list.d/opera.list'

Update:

apt-get update

Installl

apt-get install opera