Debian Jessie is expired. Update to a new OS. If you cannot do this, there is a workaround with the freexian LTS repo. wget https://deb.freexian.com/extended-lts/pool/main/f/freexian-archive-keyring/freexian-archive-keyring_2022.06.08_all.deb && sudo dpkg -i freexian-archive-keyring_2022.06.08_all.deb After this, comment out all your sources in /etc/apt/sources.list and only use: deb http://deb.freexian.com/extended-lts jessie main contrib non-free Then apt update && apt upgrade should […]
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