i installed a new Debian on a small VPS and now when i try to install sudo i just get this message. I also tried to add FTP-Server into the list and i still get that error.
root@srv45758:~# vi /etc/apt/sources.list
deb http://ftp.de.debian.org/debian/ jessie main contrib non-free
deb http://ftp.de.debian.org/debian/ main contrib non-free
deb http://security.debian.org jessie/updates main contrib non-free
Does any one maybe know the problem?