===== Basic steps =====
Step zero - change you ''/etc/apt/sources'' to new release
First the list of available packages for the new release needs to be fetched.
   aptitude update

Before any change try //dry run//
   aptitude -y -s -f --with-recommends dist-upgrade

Now you have a chance to eliminate problematic packages, especially when you don't need them.
   EXAMPLE: aptitude remove libldap2

Then upgrade packaging system
   aptitude upgrade

Finaly upgrade the whole distribution
   aptitude dist-upgrade


===== Links =====
  * [[http://www.debian.org/releases/stable/amd64/release-notes/]] Upgrade Debian amd64