deb http://archive.debian.org/debian-archive/debian/ squeeze main contrib non-free
deb http://archive.debian.org/debian-archive/debian/ squeeze-lts main contrib non-free
Для обновления
# aptitude -o Acquire::Check-Valid-Until=false update
Убрать уведомление об ошибке:
echo 'Acquire::Check-Valid-Until "false";' >/etc/apt/apt.conf.d/90ignore-release-date
Использовал 27.12.2016
Источник: http://stackoverflow.com/questions/36080756/archive-repository-for-debian-squeeze
