E: The repository 'http://http.debian.net/debian jessie-backports Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: Target Packages (main/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list:22 and /etc/apt/sources.list:23
W: Target Packages (main/binary-i386/Packages) is configured multiple times in /etc/apt/sources.list:22 and /etc/apt/sources.list:23
W: Target Packages (main/binary-all/Packages) is configured multiple times in /etc/apt/sources.list:22 and /etc/apt/sources.list:23
W: Target Translations (main/i18n/Translation-en_US) is configured multiple times in /etc/apt/sources.list:22 and /etc/apt/sources.list:23
W: Target Translations (main/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list:22 and /etc/apt/sources.list:23
Error executing command, exiting