debian 
Updating Packages Using Apt On Old Debian Installs
When attempting to install a new package or update an existing package if you are presented with the error E: Release file expired, ignoring http://archive.debian.org/debian-archive/debian/dists/squeeze-lts/Release (invalid since 189d 0h 42min 32s) You will need to execute the following command as root: $ echo ‘Acquire::Check-Valid-Until “false”;’ > /etc/apt/apt.conf.d/90ignore-release-date And then perform… Read more…