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Installation problem with Opera on HP-2133 running Ubuntu 12.04

Posted 05-24-2013 at 11:04 PM by flshope

I recently installed Ubuntu 12.04 on my HP 2133 Mini-note PC, a small laptop. Gradually I have been installing the applications software that I use on my desktops. Today, I installed the Opera browser, but with considerable difficulty. As of this date, the current stable version of Opera is 12.15. Opera is not an application that Ubuntu offers from its repository; so installation is not just a matter of running the Software Center (SC) and clicking on an install button, since Opera does not appear on the software listing.

So, I downloaded the Debian package for version 12.15 from Usually, just clicking on the downloaded file from Nautilus starts SC and installs the package. But SC declined to install the package, indicating some sort of unrecoverable problem. So I downloaded 12.14 with the intention of upgrading if 12.14 installed. SC did install Opera 12.14 and it operated as expected.

However, when I proceeded to install the 12.15 update with the Update Manager (UM), UM failed to run and put up a dialog box indicating an erroneous entry in /etc/apt/sources.list and giving the line number where the problem occurred. With this error, UM declined to run further, so a few other scheduled updates could not be made either. Apparently, UM is totally disabled by any error in sources.list. So I commented out the erroneous line in sources.list, and then UM proceeded to install the other updates, but not Opera, of course.

I compared the sources.list line with that on my other machines and found no differences. The problematical line was

deb stable

So I looked at the web site The instructions for Opera installation there said to enter the line:

deb stable non-free #Opera Browser (final releases)

When I inserted this in sources.list, UM proceeded to install the 12.15 update without further problems.
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