Package: debian-handbook Version: 8.20170323 Severity: important Hi,
In ยง6.1.3, debian-handbook encourages users of testing/unstable to include stable, testing and unstable in their sources.list. # Unstable deb http://ftp.debian.org/debian unstable main contrib non-free deb-src http://ftp.debian.org/debian unstable main contrib non-free # Testing deb http://ftp.debian.org/debian testing main contrib non-free deb-src http://ftp.debian.org/debian testing main contrib non-free # Stable deb http://ftp.debian.org/debian stable main contrib non-free deb-src http://ftp.debian.org/debian stable main contrib non-free # Security updates deb http://security.debian.org/ stable/updates main contrib non-free deb http://security.debian.org/ testing/updates main contrib non-free deb-src http://security.debian.org/ stable/updates main contrib non-free deb-src http://security.debian.org/ testing/updates main contrib non-free This sets users up for some very spectacular problems. Mixed stable/testing systems are supported only in the sense that the upgrade should be possible. Mixed stable/unstable systems are completely unsupported. Users will also install packages from stable but be unable to get security updates either to those packages or to other packages from testing/unstable owing to the particular mix they have -- conflicts/breaks will leave them held back. (It probably should have s/ftp.debian.org/deb.debian.org/ applied throughout too) thanks for fixing Stuart
