We know it is deprecated but there are still systems that are running Debian 8, or at least applications that used old packages such as PHP5 that you may need an environment to stage testing/updates for it. Here is a working sources.list for Debian 8 Jessie: deb http://archive.debian.org/debian/ jessie main contrib non-free deb http://archive.debian.org/debian-security jessie/updates main contrib non-free If you are in Docker there i........