harddian.com

Opera is one of the bests web browsers, and you can download it for your Linux Distro from its website

But if you would like to be able to upgrade your opera using apt with your Debian or Ubuntu you better use repositories.

Debian

You have to edit your /etc/apt/sources.list, and add this line.

For Etch

deb http://deb.opera.com/opera etch non-free

For Sid

deb http://deb.opera.com/opera sid non-free

For Lenny

deb http://deb.opera.com/opera lenny non-free

Now you need to import the gpg-key.

gpg –keyserver subkeys.pgp.net –recv-key 6A423791
gpg –fingerprint 6A423791
gpg –armor –export 6A423791| apt-key add -

and the update de database

apt-get update

Ubuntu

Just like with Debian you first need to edit the file

/etc/apt/sources.list

And add one of these two lines depending on which source you prefer, canonical or opera.

for canonical source

deb http://archive.canonical.com/ubuntu feisty-commercial main
or
deb http://archive.canonical.com/ubuntu edgy-commercial main
or
deb http://archive.canonical.com/ubuntu dapper-commercial main

depending if you are using Dapper, Edgy or Feisty

for opera source

deb http://deb.opera.com/opera/ stable non-free

Install the gpg-key

sudo gpg –keyserver subkeys.pgp.net –recv-key 6A423791
sudo gpg –fingerprint 6A423791
sudo gpg –armor –export 6A423791| sudo apt-key add -

update the database

sudo apt-get update

Debian or Ubuntu

Now you have your source installed and your database updated you can install opera.

sudo apt-get install opera

(from http://www.go2linux.org/opera-from-repository-for-ubuntu-or-debian)