What is Debian
Debian GNU/Linux is the underlying operating system used for our ISO appliances. Debian is the only operating system that we officially support and are capable of providing assistance with regarding upgrades and maintenance.
Debian releases a new stable version of their operating system every 2-3 years and they use a semi-rolling development model. This means that you will be provided with patches to the stable base but you are also able to upgrade to newer versions without a fresh install. That said, if you are many versions behind it is often easier and less hassle to install fresh and then migrate.
Finding Your Debian Version
In order to determine which version of Debian your system is running, you can run the following command:
This will output the numberic version which correspond to the following codenames:
- 9.x - stretch -- Still unstable. This will be the next version.
- 8.x - jessie -- The current stable version provided in our ISOs.
- 7.x - wheezy -- Old-stable. Still supported with regular updates.
- 6.x - squeeze -- Supported with priority security patches only.
- 5.x - lenny -- Not supported. We back-port *some* patches.
The code name should also be present in the /etc/apt/sources.list file which tell the package manager which version of packages to install. If you need to add additional repositories file you *must* use the codename which corresponds to your current version. Different versions have different dependency requirements which may not exist in other versions, or which may break other packages that are already on the system.
We now have a dedicated article for Debian Upgrades.