Error message:
Ign:39 http://cdn-fastly.deb.debian.org/debian-security stretch/updates/non-free Sources Ign:40 http://cdn-fastly.deb.debian.org/debian-security stretch/updates/contrib Sources Ign:41 http://cdn-fastly.deb.debian.org/debian-security stretch/updates/main amd64 Packages Ign:42 http://cdn-fastly.deb.debian.org/debian-security stretch/updates/main all Packages Ign:43 http://cdn-fastly.deb.debian.org/debian-security stretch/updates/main Translation-en Ign:44 http://cdn-fastly.deb.debian.org/debian-security stretch/updates/main Translation-en_US Ign:45 http://cdn-fastly.deb.debian.org/debian-security stretch/updates/contrib all Packages Ign:46 http://cdn-fastly.deb.debian.org/debian-security stretch/updates/contrib amd64 Packages Ign:47 http://cdn-fastly.deb.debian.org/debian-security stretch/updates/contrib Translation-en_US Ign:48 http://cdn-fastly.deb.debian.org/debian-security stretch/updates/contrib Translation-en Reading package lists... Done W: The repository 'http://cdn-fastly.deb.debian.org/debian-current stretch-backports Release' does not have a Release file. N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use. N: See apt-secure(8) manpage for repository creation and user configuration details. W: The repository 'http://cdn-fastly.deb.debian.org/debian-current stretch Release' does not have a Release file. N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use. N: See apt-secure(8) manpage for repository creation and user configuration details. W: The repository 'http://cdn-fastly.deb.debian.org/debian-security stretch/updates Release' does not have a Release file. N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use. N: See apt-secure(8) manpage for repository creation and user configuration details. E: Failed to fetch http://cdn-fastly.deb.debian.org/debian-current/dists/stretch-backports/main/source/Sources 404 Not Found E: Failed to fetch http://cdn-fastly.deb.debian.org/debian-current/dists/stretch/non-free/source/Sources 404 Not Found E: Failed to fetch http://cdn-fastly.deb.debian.org/debian-security/dists/stretch/updates/main/source/Sources 404 Not Found E: Some index files failed to download. They have been ignored, or old ones used instead.
