Dependencies
From OpenSimulator
In addition to the OpenSim code itself, certain other packages need to be installed on different platforms in order to get OpenSim binaries to run.
As well as the information on this page (which should be expanded), you may find more information on dependencies in Build Instructions though this will also contain dependencies required only for building. This are also more hints in Troubleshooting
Windows
I don't believe any extra packages need to be installed to get the binaries running. More information on this would be most welcome
When using OpenSim on Windows XP, you need to have sp2 installed along with the newest version of the .net framework Google knows where to find it Here
When using OpenSim on Windows Vista, You need to have the newest version of the .net framework, and run the program as administrator. (right click run as a administrator)
Some other errors occur if some other program is using port 80.
Linux
The easiest plaform to get running on the Linux side is Ubuntu 8.10, 32bit. This is what most of the developers running Linux use. If you are looking for the quick path, start there.
Note: For people who have mono 2.0.1 or later installed, it may not be necessary to install the libmono-oracle2.0-cil package detailed below separately.
Ubuntu 8.04 (Hardy) / 8.10 (Intrepid) / 9.04 (Jaunty)
sudo apt-get install subversion nant mono-gmcs libmono-microsoft8.0-cil \ libmono-system-runtime2.0-cil libgdiplus libmono-i18n2.0-cil libmono-oracle2.0-cil ruby
Note for Ubuntu 8.04 (Hardy) users: You can use the built in packages for mono. However, for better performance, you may want to upgrade mono to 1.9.1 (Other simple method)
CentOS 5.2 (Final)
You made need to include libmono-oracle2.0-cil will check tonight - Kane
yum install subversion nant mono-gmcs libmono-microsoft8.0-cil \ libmono-system-runtime2.0-cil libgdiplus libmono-i18n2.0-cil ruby