merci de me confimer que mes sources on l’air correct ?
# Debian Stretch, dépôt principal + paquets non libres
deb http://deb.debian.org/debian/ stretch main contrib non-free
# Debian Stretch, mises-à-jour de sécurité + paquets non libres
deb http://security.debian.org/ stretch/updates main contrib non-free
# Debian stretch, mises-à-jour "volatiles" + paquets non libres
deb http://deb.debian.org/debian/ stretch-updates main contrib non-free
#deb cdrom:[Debian GNU/Linux 9.1.0 _Stretch_ - Official amd64 xfce-CD Binary-1 20170722-11:29]/ stretch main
deb http://security.debian.org/debian-security stretch/updates main contrib non-free
deb-src http://security.debian.org/debian-security stretch/updates main contrib non-free