i will show in this small tutorial how to upgrade debian to latest release .in this example i will update my debian 8.2 to 8.3 . but also i will show you how to upgrade Debian 7 to 8 o maybe later major version of 8 release .
Lets show you my actual release :
Upgrade Debian 7 to 8
Edit /etc/apt/sources.list
vi /etc/apt/sources.list deb http://ftp.de.debian.org/debian wheezy main contrib non-free deb-src http://ftp.de.debian.org/debian wheezy main contrib non-free deb http://ftp.de.debian.org/debian wheezy-updates main contrib non-free deb http://ftp.de.debian.org/debian-security wheezy/updates main contrib non-free
change the words wheezy with jessie
save and exit
Now run to update the new packages database
apt-get update
then
apt-get upgrade
now start the upgrade to the new release
apt-get dist-upgrade
Please before to reboot check if any packages stay blocking in the queue
dpkg --audit dpkg --get-selections | grep hold
Reboot your machine and Enjoy
Upgrade debian 8.0 to 8.x
the bellow commands are sufficient to go to latest version of your installed release
apt-get update apt-get upgrade
Reboot
