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
There is a universal location for your Linux distribution name available with:
Debian also lists the version number with the point release here:
Either will give you the information you need as only the integer value matters. The numberic version displayed corresponds to the following code names:
- 9.x - stretch -- The current stable version distributed as our ISO appliance.
- 8.x - jessie -- The old-stable version. Still supported.
- 7.x - wheezy -- The old-old-stable version. Still supported.
- 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 Install Non-RP Packages you *must* use the code name which corresponds to your current version (the same one listed for the rest of the sources).
We now have a dedicated article for Debian Upgrades.