apt-get update
Atteint:1 http://security.debian.org stretch/updates InRelease
Ign:2 http://deb.debian.org/debian stretch InRelease
Atteint:3 http://deb.debian.org/debian stretch-updates InRelease
Atteint:4 http://deb.debian.org/debian stretch Release
Ign:5 http://ftp.debian.org/debian jessie-backports InRelease
Err:6 http://ftp.debian.org/debian jessie-backports Release
404 Not Found [IP : 130.89.148.12 80]
Lecture des listes de paquets… Fait
E: The repository ‘http://ftp.debian.org/debian jessie-backports Release’ does no longer have a Release file.
N: Updating from such a repository can’t be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
Merci pour votre aide