New Opera for Ubuntu

Today when I started-up Opera in Ubuntu I was notified of a new update which I duly downloaded. I uninstalled the old version using the Synaptics Package Manager. But I probably could have removed it with the following command

sudo apt-get remove --purge opera

Anyway in order to install the new version that I'd downloaded to my Desktop, I did the following.

cd ~/Desktop
sudo dpkg -i opera_9.51.2061.gcc4.qt3_i386.deb