What Kinds of Firmware Releases Are There?

Code-level maintenance for software releases is typically delivered in form of Major Version updates, Stable Releases, or Private Builds.

Private Builds are minor updates of the Major VersionStable Releases are publicly available interim releases. A base for both kinds is the latest released Major Version. When an updated Major Version is released, it will replace all the previous firmware versions unless otherwise noted by IGEL.

A special case is a Dead End Release, which is a special kind of Private Build. Support for this version is given and will be handled like usual Private Builds.*


Supported by IGEL support

Passed quality assurance run

Can be used in productive environment

Download from public server / UMS update mechanism possible

Guarantee for subsequent releases

Major Version

Stable Release

Private Build

only if scheduled for the public download

only if it fixes a general problem

Dead End Release

Important: No support for the upgrade from IGEL Linux 10 to IGEL OS 11

Release Candidate

Technology Preview

See also What is the Meaning of IGEL Release Names?