Install Opera from the command line.

Just came across this which might save me some time as I seem to be continually installing this web browser.
The version is very old but that's easily rectified.
Just two steps:

wget http://get.opera.com/pub/opera/linux/926/final/en/i386/shared/opera_9.26-20080218.6-shared-qt_en_i386.deb

and

sudo dpkg -i opera_9.26-20080218.6-shared-qt_en_i386.deb