I tried to follow a poorly explained tutorial on how to install the Opera browser from the terminal. After this failed, I have not been able to get to the Software Center or the Software Updater. I also get this error message:
An error occurred, please run Package Manager from the right-click menu or apt-get in a terminal to see what is wrong. The error message was: 'Error: Opening the cache (E:Malformed line 1 in source list /etc/apt/sources.list.d/opera.list (dist), E:The package lists or status file could not be parsed or opened.)'. This usually means that your installed packages have unmet dependencies.
Yes, I've seen all the other "malformed line" threads, but nothing is helping. Any help would be greatly appreciated. I am running 13.04.