If you're using Debian Stable aka Debian GNU/Linux 8 Jessie, it's time to update it. Debian has just released a new version, (Debian GNU/Linux 8.7), which includes over 170 fixes and security updates.
Debian GNU/Linux 8.7 update is the latest and most advanced build of the Debian Jessie series, and brings fixes for all issues security που ανακαλύφθηκαν και επιδιορθώθηκαν μετά την κυκλοφορία του Debian 8.6 στα μέσα Σεπτεμβρίου του περασμένου έτους. Φέρνει επίσης και δεκάδες ενημερωμένες εκδόσεις εφαρμογών.
Of course, if you already use Debian GNU / Linux 8 Jessie on a personal computer or your server, and you have all the latest updates installed, then you do not have to do something as you are already running Debian 8.7.
If you want to install the distribution from scratch, you can download the ISO files that have not yet been uploaded to official Debian repositories.
The upcoming ISOs will help you install Debian Jessie without having to download hundreds of updates after the installation.
To download new ISO as soon as they appear, you can check the official repository in the next hours from the following link
http://cdimage.debian.org/debian-cd/
Read the official announcement describing all changes