Mono

Linux/Unix ONLY. Windows users don’t need mono
© Crista Lopes. All rights reserved.

There isn’t one single set of instructions for installing mono on your
Linux/Unix machine — the installation depends on your flavour of
Linux/Unix. With luck, you will find the mono installer for the exact
version of your operating system here:
http://www.go-mono.com/mono-downloads/download.html

The mono community provides additional installers beyond those
available by the Mono project. Use Google or your favorite site for
information about how to install mono on your operating system.

Important things to keep in mind:

• OpenSim requires mono 2.10.8.1 or higher. Older versions of mono will
  not run OpenSim.

• Some of the most recent versions of mono may not run OpenSim
  well. Please research and ask around to find out about other
  people’s experiences with mono and OpenSim.

• The mono project consists of the Mono framework itself, along with
  several other components such as monodevelop, monodoc, etc. If you
  don’t plan to develop further applications with mono, the only thing
  you need to run OpenSim is the mono framework itself.

Once you install mono, type this:
$ mono —version

Make sure you have the right version installed.