MathLM is the license-managing software for Mathematica and Wolfram SystemModeler. MathLM can be installed on Windows-, Mac- and Linux-based servers.
The Mathematica System Administration page contains guides for installing MathLM:
If you already have a version of MathLM installed and want to upgrade to a later version, you may be interested in the following articles:
Note that simply updating the product license information on your existing MathLM installation does not require reinstalling MathLM: