This document describes how to upgrade any number of thin clients (UD) or zero clients (IZ) from IGEL Linux v5.x to IGEL Linux 10.

If you have IGEL Linux v5.11 or higher, you can upgrade directly to IGEL OS. If you have an older version of IGEL Linux v5, you need to update to IGEL Linux v5.11 or higher first, preferably IGEL Linux v5.13.110. However, it is possible to combine these two steps; see Mass Upgrading Your Devices.