The easiest way to get started using the Mininet network simulator is to use the Mininet virtual machine. It is based on the Ubuntu Linux Server operating system and comes with all the software and tools required to support Mininet already installed.
The Mininet web site provides detailed setup notes, describing how to download and use the Mininet virtual machine. While I was following the procedure described in these notes, I found a few points where some more information would have been helpful. For my own reference, and to help anyone else who will install Mininet, I list the procedure I followed in the post, below.