I am a total newbie to Ubuntu, and any Linux distro for the matter. So far I have been able to watch videos and research on google how to install all the programs I need but when I run sudo apt-get update I get the following messages.
W: Target Packages (Packages) is configured multiple times in /etc/apt/sources.list:54 and /etc/apt/sources.list:55
W: Target Translations (en_US) is configured multiple times in /etc/apt/sources.list:54 and /etc/apt/sources.list:55
W: Target Translations (en) is configured multiple times in /etc/apt/sources.list:54 and /etc/apt/sources.list:55
E: The method driver /usr/lib/apt/methods/https// could not be found.
W: The repository 'http://downloads.sourceforge.net/project/xenlism-wildfire/repo deb/ Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Failed to fetch https//://deb.opera.com/opera-stable/dists/stable/InRelease
E: Some index files failed to download. They have been ignored, or old ones used instead.
W: Target Packages (Packages) is configured multiple times in /etc/apt/sources.list:54 and /etc/apt/sources.list:55
W: Target Translations (en_US) is configured multiple times in /etc/apt/sources.list:54 and /etc/apt/sources.list:55
W: Target Translations (en) is configured multiple times in /etc/apt/sources.list:54 and /etc/apt/sources.list:55
I have tried apt-get clean and read this link here but that didn't help.
How can I fix it?
