How to install opera?

[Peng Yu]

On Wed, Jun 2, 2010 at 3:36 PM, Allan Javier Aguilar Castillo
<elleuthe at gmail.com> wrote:
> 2010/6/2 Peng Yu <pengyu.ut at gmail.com>
>> I have the latest ubuntu LTS. But I don't find opera. How to
>> install opera?
>    Hello! You may add the Opera repository for Debian (it
> installs DEB packages and run very well). Modify (with
> privileges) the '/etc/apt/sources.list' file:
>       Alt F2
>       gksudo gedit /etc/apt/sources.list
>    Add the following line at the end:
>       deb http://deb.opera.com/opera/ lenny non-free
>    From the terminal, run these commands:
>       sudo wget -O - http://deb.opera.com/archive.key | sudo apt-key add -
>       sudo aptitude update
>       sudo aptitude install opera
>    And that is it. Enjoy!

I'm wondering if editing system files may cause problems when I want
to upgrade the operating systems in the future.

-- 
Regards,
Peng