Debian 7.6 has been released. This version of Debian has important security fixes so upgrading is a good idea that can help protect your data. You can get a complete list of changes in the Debian 7.6 announcement.
Here's how to upgrade your Debian system to 7.6:
1. Open a terminal window.
2. Type in the following commands then hit Enter after each:
sudo apt-get update
sudo apt-get dist-upgrade
Source: Linux G
Additional Debian Resources