In order to install the ETS Inside server, you have to either buy a license from MyKNX if you would like the full functionality, or download it from the Downloads section of MyKNX, if you only need the demo version.
Once the download of the setup file is complete, copy it to the device where the ETS Inside server is to be installed, making sure that the hardware requirements are met.
Locate the ETS Inside setup file that you have downloaded from MyKNX. Usually, this is under your personal Downloads, however the download location is user-specific and maybe different. In this example, the setup file is stored on the Ubuntu default Downloads.
Uncompress the tarball and choose your CPU architecture, In this example the Ubuntu distro runs on a x86_64 Intel i7 Core.
Uncompress the tarball of the ETS Inside server, then open the INSTALLATION.txt file, which guides you through the installation procedure step-by-step, with dependencies and all the system setups (folders, users, rights, ...) needed for the target system.
Please note, that there is no icon on the desktop shown or an entry in the Linux Start Menu once the ETS Inside server is installed. ETS Inside server is a Linux daemon that runs in the background of your computer and you need one of the ETS Inside clients to be able to work with it.