Today I get this message when trying to run
apt update on my Debian:
Hit:1 http://security.debian.org stretch/updates InRelease Ign:2 http://mirrors.digitalocean.com/debian stretch InRelease Hit:3 http://mirrors.digitalocean.com/debian stretch-updates InRelease Hit:4 http://mirrors.digitalocean.com/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: 22.214.171.124 80] Get:7 http://deb.goaccess.io stretch InRelease [2,520 B] Get:8 https://packages.sury.org/php stretch InRelease [6,760 B] Hit:9 https://download.docker.com/linux/debian stretch InRelease Get:10 https://deb.nodesource.com/node_6.x stretch InRelease [4,635 B] Hit:11 https://repos.sonar.digitalocean.com/apt main InRelease Err:8 https://packages.sury.org/php stretch InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B188E2B695BD4743 Reading package lists... Done 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. W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://packages.sury.org/php stretch InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B188E2B695BD4743
Any help will be much appreciated :)
This textbox defaults to using Markdown to format your answer.
You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!
These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.
Join our DigitalOcean community of over a million developers for free! Get help and share knowledge in Q&A, subscribe to topics of interest, and get courses and tools that will help you grow as a developer and scale your project or business.
Click below to sign up and get $200 of credit to try our products over 60 days!