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If you prefer Opera over the Firefox browser, then you should read this article. To install the Opera 11 browser on Ubuntu 11.10 Oneiric Ocelot you need to use a couple simple commands through Terminal.
Steps
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To add Opera’s public key, first press Ctrl+Alt+T on your keyboard to open Terminal. When it opens, type or use copy/paste method to add following command: sudo sh -c 'wget -O - http://deb.opera.com/archive.key | apt-key add -' and hit Enter. -
When it asks password, type password and hit Enter again.Advertisement -
Now to add Opera repository type or use copy/paste method to add following command: sudo gedit /etc/apt/sources.list.d/opera.list and hit Enter. -
When Gedit show's up, copy this line to Opera list: deb http://deb.opera.com/opera/ stable non-free then save it and close Gedit. -
After you close Gedit, type or copy/paste following command to the Terminal, to update your system: sudo apt-get update and hit Enter. -
To install Opera, type or use copy/paste method to add following command: sudo apt-get install opera-stable and hit Enter. -
When it asks you that do you want to continue, type 'Y' to the Terminal and hit Enter. -
After Opera browser are installed, now close your Terminal. -
To run Opera browser, press window key (key beside Alt key) to open Dash and type 'op' to search function, then click with your mouse on icon. -
If you want, read Opera Software End-User License, then click on 'I Agree' button with your mouse. -
Now, you're ready to use Opera 56 browser.
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