On Mac or Windows, the License Server is installed by double-clicking the setup application. On Linux, it is installed by downloading the installation archive and extracting it in a folder of your choice.
The License Server has no external dependencies, the complete application is contained in the folder where it is installed.
By default, the License Server will be installed in a folder named "callas License Server", with the name of the executable "licenseServer". The License Server has no user interface, you can only use it through command-line interaction (using terminal or command prompt), or through some sort of scripting.