source.list debian 8 jessie

Segue uma sugestão:

deb http://ftp.br.debian.org/debian/ jessie main non-free contrib
deb-src http://ftp.br.debian.org/debian/ jessie main non-free contrib

deb http://ftp.br.debian.org/debian/ jessie-updates main non-free contrib
deb-src http://ftp.br.debian.org/debian/ jessie-updates main non-free contrib

deb http://ftp.br.debian.org/debian/ jessie-backports main non-free contrib
deb-src http://ftp.br.debian.org/debian/ jessie-backports main non-free contrib

deb http://security.debian.org/ jessie/updates main contrib non-free
deb-src http://security.debian.org/ jessie/updates main contrib non-free