The H-Online: The Debian developers have pointed out, in an announcement on the debian-announce mailing list, that – three years after it was released –Debian GNU/Linux 5.0 (Lenny) has reached its “End of Life”. Debian GNU/Linux 5.0 was originally released in February 2009 and on 6 February 2012, the developers stopped providing security updates for that version of the distribution.
Users have now had a year to update their systems to Lenny’s successor, Squeeze, which was released on 6 February 2011. The Debian developers recommend that any installations that are still using Debian 5.0 should be updated to version 6 of the distribution immediately. The Debian community recently released version 6.0.4 of Debian Squeeze which includes all the updates that have been released for Squeeze since its release.