Или как использовать Debian 7 Wheezy и Debian 8 Jessie в 2019 году.

Ничто не вечно, все Debian пакеты попадают в рай архив, подробнее здесь Removal of Wheezy and Jessie (except LTS) from mirrors

❌ При запуске apt update ошибка

E: Some index files failed to download. They have been ignored, or old ones used instead.

❌ Если подключен backports, то будет еще ошибка

W: Failed to fetch http://ftp.debian.org/debian/dists/jessie-backports/main/binary-amd64/Packages  404  Not Found [IP: 130.89.148.12 80]

W: Failed to fetch http://ftp.debian.org/debian/dists/jessie-backports/contrib/binary-amd64/Packages  404  Not Found [IP: 130.89.148.12 80]

W: Failed to fetch http://ftp.debian.org/debian/dists/jessie-backports/non-free/binary-amd64/Packages  404  Not Found [IP: 130.89.148.12 80]

✅ Новый /etc/apt/sources.list выглядит так

deb http://security.debian.org/ jessie/updates main
deb-src http://security.debian.org/ jessie/updates main

deb http://archive.debian.org/debian/ jessie main contrib non-free
deb-src http://archive.debian.org/debian/ jessie main contrib non-free

deb http://archive.debian.org/debian/ jessie-backports main
deb-src http://archive.debian.org/debian/ jessie-backports main

❌ Ошибка с включенным backports репозиторием

E: Release file for http://archive.debian.org/debian/dists/jessie-backports/InRelease is expired (invalid since 188d 17h 37min 57s). Updates for this repository will not be applied.

✅ Запускаем apt с дополнительным ключом для отключения проверки срока действия репозитория

# apt-get -o Acquire::Check-Valid-Until=false update

или

✅ можно создать файл настроек apt

# echo 'Acquire::Check-Valid-Until no;' > /etc/apt/apt.conf.d/99-no-check-valid-until

UPD wheezy

deb http://archive.debian.org/debian/ wheezy main
deb-src http://archive.debian.org/debian/ wheezy main
deb http://security.debian.org/ wheezy/updates main contrib
deb-src http://security.debian.org/ wheezy/updates main contrib