Build Instructions

This page covers building OpenSim from source code on multiple platforms. Please help us keep this page up to date as the project progresses.

Download OpenSim
Check out the Download page for instructions on obtaining an OpenSim source release.

General notes
Although this page is long, building is generally quite simple. See the BUILDING.txt file in the distribution itself for simplified instructions.

MS Windows
UPDATED: Jan.23.2011

OpenSim requires either the .Net Framework version 3.51, or Mono 2.4.2.3 or newer. It supports the following compilers:

Net Framework is available from here: www.microsoft.com/downloads/details.aspx

New URL: http://www.microsoft.com/express/Windows/ ( The Visual Studio® 2010 Express )
 * Microsoft Visual C# Express Edition (note: not Visual C++)
 * mono

Additional note: If you like IDE's you will need C# express 2008 or VS 2008.

Additional note: Microsoft C# Express v9 may install .Net 3.5 with resultant path error.


 * 1) To avoid install .Net framework version 2.0 (installed by default in Windows XP &amp; newer)

Additional note: It is possible to develop on Windows Vista 64 bits with the following tweaks:


 * 1) Select OpenSim project properties from solution and choose platform to be x86. Rebuild solution.
 * 2) Select OpenSim.exe properties under solution bin folder and choose windows xp sp 2 compatibility mode + run as administrator.

Additional note: It is possible to develop with Visual Studio 2010 - C# Express with the following tweaks:


 * 1) In the top-level directory, run the 'runprebuild.bat' file. This will create a VS2008 solution file.
 * 2) Open the VS2008 solution file in VS 2010 Express and run the conversion wizard to crease a VS2010 solution file.
 * 3) In the solution explorer of the resulting project, right click on each project (there are 91) and select properties. Under the Application tab, set the Target framework to .NET Framework 3.5.
 * 4) In the solution explorer, under the OpenSim project select "app.config".
 * 5) Copy the contents of bin\OpenSim.exe.config into the app.config file

Building

 * In the top-level directory, run the 'runprebuild.bat' file. This will create a VS2008 solution file, a nant build file and a 'compile.bat' file.


 * Open the resulting sln file with visual studio and build it there, or
 * Run the 'compile.bat' file. This will build the executable using MSBuild.
 * if you prefer to use nant, run nant in the same top-level directory. This will build the executables.

Note that only a limited number of directories and files are actually required for a working system,the rest are just used for source code and the build process: addon-modules bin doc share ThirdParty ThirdPartyLicences BUILDING.txt CONTRIBUTORS.txt LICENSE.txt README.txt TESTING.bat

Running
Copy the bin/OpenSim.ini.example file to bin/OpenSim.ini before making any changes.

Assuming you initially want to create an Opensim Standalone setup, the example Opensim.ini already has the appropriate [Architecture] setting for that in place referring to an include file at bin/config-include/StandaloneCommon.ini.example.

Copy the bin/config-include/StandaloneCommon.ini.example file to bin/config-include/StandaloneCommon.ini</tt> before making any changes to that too. A cache is recommended to make Opensim run in a more stable and efficient manner. Choose a cache as described in bin/config-include/StandaloneCommon.ini</tt>.

Double-click on the OpenSim.exe</tt> executable file in the bin</tt> directory. This will start up OpenSim in standalone mode.

The debugger in VS2008 C# may be used to step through the code. For those that use a Cygwin shell, you may find that one or more dll's have permissions that cause problems running. Most find that a "chmod 777 *</tt>" from the bin</tt> directory solves this.

Windows Vista

Some people have reported that to run on Windows Vista, you must first disable Windows Firewall. Under the new "Start" button of Vista, select "Control panel". Then double-click "Windows Firewall". In the window that pops up, on the left column, select "Turn Windows Firewall on or off". You will have to give permission for this to run, then select the option "Off (not recommended)". Click "OK" and exit from the Windows Firewall window.

If you have McAfee SecurityCenter, see the description below.

Once all the security features are disabled, right click on OpenSim.exe</tt> and select "Run as administrator". This will pop up a window asking permission, select "Allow". Your OpenSim server should run in a DOS-like window and accept connections.

McAfee Security

McAfee Security does not allow applications to listen on ports not explicitly specified. You have two options: 1) disable firewall protection all together, 2) enable OpenSim.exe</tt> to be able to open ports.

Disable firewall

Open McAfee SecurityCenter. Select "Internet &amp; Network". In the lower left corner is a small link to "Configure...". Select this. In the right side of the window, select the bar that says "Firewall protection is enabled". Here you can select "Off".

Enable OpenSim.exe</tt> to open ports

Open McAfee SecurityCenter. Select "Internet &amp; Network". In the lower left corner is a small link to "Configure...". Select this. In the right side of the window, select the bar that says "Firewall protection is enabled". Select the "Advanced..." button. This will pop up a new window.

In the new window, on the left side, select "Program Permissions." In the middle on the right side of the window, select the "Add Allowed Program" button. Use the browser that pops up to find the OpenSim executable and select it.

Finally, select "OK" and exit the McAfee SecurityCenter window.

Linux/Mac OS X/FreeBSD
The easiest platform to get running on the Linux side is Ubuntu 10.04, 32bit. This is what most of the developers running Linux use. If you are looking for the quick path, start there.

Many distros (including Ubuntu) ship with only the "mono-runtime" package installed, however you need to install "mono-complete" for some OpenSimulator features such as LSL script commands.

Ubuntu
For Ubuntu users on older distributions (7.10, 8.04, etc.) you need to upgrade your version of mono to at least 2.4. For anyone who needs to upgrade their Mono, see Update Mono on Ubuntu.

Ubuntu Karmic (9.10) includes mono 2.4.2.3 packages.

Ubuntu Lucid (10.04) includes mono 2.4.4 packages

Ubuntu Maverick (10.10) includes mono 2.6.7 packages

To build:

sudo apt-get install nant mono-gmcs libmono-microsoft8.0-cil \ libmono-system-runtime2.0-cil libgdiplus libmono-i18n2.0-cil libmono-oracle2.0-cil Download opensim cd opensim ./runprebuild.sh nant

openSUSE 10.3/11/11.1
Install an openSUSE 11.1, 11 or 10.3 with its default options, add the online repositories when finished installing do an online update with all the latest packages.

In yast install these packages, for running Opensim in standalone mode. (there is a slight diffrence between 10.3 and 11/11.1 but following should be same) subversion nant mono-jscript - check that mono-core is installed

just in case you do not already have it installed

sudo zypper install mono-data-oracle

A tip for OpenSuSE 11.1 users - you can install packages from the command line using the 'zypper' tool. For example, to install 'nant', use this command:

sudo zypper install nant

If you just want to use SQLite then jump to last section within this post.

Install these mysql packages via yast mysql mysql-client mysql-administrator mysql-gui-tools mysql-query-browser
 * Optional mysql - for Opensim running in Grid mode:

(note that selecting mysql in the Yast2 Installer will select the other packages automatically)

Before building create the mysql database. /etc/init.d/mysql start mysql -u root -p -h localhost (when asked for password just hit enter)

mysql> create database opensim; mysql> use opensim; mysql> create user 'opensim'@'localhost' identified by 'thePassword'; mysql> grant all on *.* to 'opensim'@'localhost'; mysql> quit


 * note that the grant all command may differ if you're adding the opensim database to an existing mysql installation.

On current builds set the connection string inside bin/OpenSim.ini after coppying the OpenSim.ini.example file. If you are changing to MySQL from SQLite, the connection string for mysql also exists in the bin/Region/*xml files.
 * It is important to remember this if you start out using the built-in SQLite database engine.

Build after installation of above in bash terminal. I save it in /opt

su - cd /opt Download opensim cd opensim ./runprebuild.sh nant

Or, if you have a current (0.6+), you can simply execute:

make

After this you should be able to continue on starting the diffrent Servers, look in the mysql-config section,or just run your OpenSim as a Standalone.

Mac OS X 10.4/10.5 on PowerPC
OpenSim can run on PowerPC Macs (such as G4, G5). These instructions were tested on 10.5.8. Note that two libraries must also be built from source. Caveat: the OpenSim app was only briefly tested in self-contained mode. There may well be issues with this build. Feel free to note any issues you find below (or in a new wiki page? discussion?).

Unfortunately, the OpenSim version used here must be compiled on one version of Mono (2.6.7) and run on another (2.8.2). This means either upgrading Mono after the build, or having both versions installed and accessing the older version when you want to build. These instructions let you have both versions installed.


 * Install Xcode 3.1.4 Developer Tools from from http://developer.apple.com/. You must have a free Apple developer account to access the downloads. 3.1.4 was the last PowerPC Xcode.

export OSIM_HACK_ORIG_PATH=$PATH export PATH=$PATH:/Library/Frameworks/Mono.framework/Versions/Current/bin:/usr/local/mysql/bin export PKG_CONFIG_PATH=/Library/Frameworks/Mono.framework/Versions/2.6.7/lib/pkgconfig alias oldpath="export PATH=$OSIM_HACK_ORIG_PATH:/Library/Frameworks/Mono.framework/Versions/2.6.7/bin" oldpath ./runprebuild.sh nant
 * (10.4 only) Install X11 from the Optional Install (or see if it's a Customize option when you install Xcode). 10.5 gets X11 by default (from OS X or dev tools?).
 * Install Mono 2.6.7 PowerPC Framework from here: http://www.go-mono.com/mono-downloads/download.html (binary OS X Framework, no need to build from source)
 * Then install Mono 2.8.2 PowerPC framework. For these instructions to work, you must first install 2.6.7, THEN 2.8.2. (The old framework is not deleted, but "Current" symlinks are updated).
 * Download OpenSim 0.7.0.2 source tarball: http://dist.opensimulator.org/opensim-0.7.0.2-source.tar.gz Expand to a suitable folder for development and running.
 * Feel free to try a newer version of OpenSim (the repository is on git now).
 * If you used a newer OpenSim version, check BUILDING.txt for any changes to build instructions (we fall under "Linux")
 * Edit or create .profile or .bash_profile in your OS X home folder, with the following lines:
 * 1) remember real PATH
 * 1) normal path for running OpenSim
 * 1) Just for nant:
 * Open a new Terminal window, and cd to your uncompressed OpenSim source folder (shortcut: type "cd " then drag the folder to the Terminal window). The enter these commands:

svn co http://libopenmetaverse.googlecode.com/svn/libopenmetaverse/trunk/openjpeg-dotnet libopenmetaverse-read-only cd libopenmetaverse-read-only mono OpenSim.exe Here are the earlier instructions for PowerPC, and others for Intel:
 * nant should take around 10 minutes to compile your OpenSim. If you get through that without errors, you're halfway there! (I did get 234 warnings).
 * *Important* Before we forget, open a new Terminal window (necessary to avoid the effects of "oldpath").
 * Now we need PowerPC versions of two libraries. Build each one and replace the compiled .dylib files in the opensim/bin folder.
 * libode.dylib http://cdnetworks-us-1.dl.sourceforge.net/project/opende/ODE/0.11.1/ode-0.11.1.zip
 * libopenjpeg-dotnet-2.1.3.0-dotnet-1.dylib (checked out with svn:)
 * To build, remove the Makefile file, which is for Linux, and rename Makefile.osx to just Makefile, then give the command: make )
 * Remove the other versions of the two libraries (similar names, different extensions, like "libode-x86_64.so". Two libode's and three libopenjpeg's).
 * Configure your sim: Copy OpenSim.ini.example to OpenSim.ini and customize it per its comments.
 * Likewise copy and customize StandaloneCommon.ini in bin/config-include
 * Note that the comments say that the current SQLite plugin doesn't work on OS X. Either solve that, or install MySQL, which requires no compiling and is relatively easy to set up:
 * From http://downloads.mysql.com/archives.php?p=mysql-5.1&v=5.1.40, download MySQL 5.1.40 for 10.5 PowerPC (installer, not 64-bit)
 * Run the installer. (which installs to /usr/local)
 * Install MySQL.prefPane into System Preferences by double-clicking it.
 * Open the pref pane and start MySQL.
 * (Optional:) For unattended startup, install MySQLStartupItem (doesn't always work for me).
 * (Recommended:) In Terminal, do the one-time setup of MySQL with this command: mysql_secure_installation
 * In MySQL, create the opensim user per the comments in OpenSim.ini. Give it all the create privileges.
 * Since this is a Mac, you could use Sequel Pro (donationware) to do that in a nice GUI. Standard connection, host: 127.0.0.1 (if on the same Mac)
 * You're ready to run OpenSim. In that new Terminal window, cd to your OpenSim-source/bin folder.
 * If all is well, you will be prompted "New region name []: "
 * Turn to "Running OpenSim for the first time" on wiki page Configuration - OpenSim
 * When fully up and running, the prompt is "Region (<region-name>) #"

export PKG_CONFIG_PATH="/Library/Frameworks/Mono.framework/Versions/Current/lib/pkgconfig/:${PKG_CONFIG_PATH}" svn co http://opensimulator.org/svn/opensim/tags/0.5.0-release opensim cd opensim ./runprebuild.sh nant
 * OpenSim is now working on PowerPC Macs! Thanks to DrScofield and those who helped him. Current nightly builds for PowerPC are not working, not sure about Intel so use the 0.5 Build. OpenSim works on Intel Macs. I'm testing on PowerBook G4. Tested these step on 10.5, but not 10.4 but should work (Works on iMac G5 with OS 10.4.11, including expanding to local grid mode.
 * Install XCode Developers Tools from DVD/CD Installation Disk or download from http://developer.apple.com/. You have to create an Apple account to access the downloads if you don't have an Apple account.
 * Install X11 for 10.4 from the Optional Install from the DVD/CD Installation Disk. X11 for 10.5 is installed by default.
 * Install Mono 1.2.5 from http://ftp.novell.com/pub/mono/archive/1.2.5/macos-10-universal/5/MonoFramework-1.2.5_5.macos10.novell.universal.dmg (The more recent releases Mono 1.2.6, 1.9.1 and 2.0.1 do not appear to work with these installation instructions And in Terminal or X11 edit the .profile file and add the following line:
 * Compile OpenSim

svn co http://opensimulator.org/svn/opensim-libs/old/libsl1550 opensim-libs cd opensim-libs/openjpeg-libsl make -f Makefile.osx cp libopenjpeg-libsl-2.1.2.0.dylib ../../bin
 * Download and Compile libopenjpeg-libsl-2.1.2.0.dylib and libsecondlife.dll
 * libopenjpeg-libsl-2.1.2.0.dylib:
 * Note: The Makefile that creates the libopenjpeg-libsl-2.1.2.0.so does not compile on PowerPC, but works properly on Intel Macs. Looks like a gcc issue with compile options. (It appears to work on iMac G5 with OS X 10.4.11.

cd .. (back into opensim-libs) nant cp bin/libsecondlife.dll ../bin
 * libsecondlife.dll: (for PowerPC Only, see details on this step installing OpenSim on PowerPC…or: of eggs and virtual worlds)


 * Edit the libsecondlife.dll.config (PowerPC Only). Remove the cpu="x86" tag in the last dllmap line.

Mac OS X 10.5 and later, Intel
You might find it work for your environment (OS X 10.5.7, Intel):

export PKG_CONFIG_PATH="/Library/Frameworks/Mono.framework/Versions/Current/lib/pkgconfig/:${PKG_CONFIG_PATH}" svn co http://opensimulator.org/svn/opensim/tags/0.6.5-post-fixes opensim cd opensim ./runprebuild.sh nant You might find it work for your environment (OS X 10.5.7 and 10.6, Intel) on (8/9/09):
 * make sure you have X11 installed
 * grab the Apple Dev Tools from
 * install Mono Framework 2.4 from
 * Recent versions of Mono/Nant seem to require an adjustment to PkgConfig. And in Terminal or X11 edit the .profile file and add the following line:
 * Get OpenSim source:
 * Compile OpenSim:

Mono includes nant, so it should not be necessary to build nant with MacPorts, but others have done so and left these intructions: sudo port -v selfupdate sudo port install nant cd opensim ./runprebuild.sh nant This release had some bugs with default automatic configuration on the first startup of OpenSim.exe. bin/Regions/default.xml (region configuration file) is not automatically created in the main directory. Therefore, you must manually create this file. Here is an example. <Root> <Config sim_UUID="UUID" sim_name="NAME" sim_location_x="1000" sim_location_y="1000" internal_ip_address="IP_ADDRESS_OF_SERVER" internal_ip_port="9000" allow_alternate_ports="false" external_host_name="DNS_NAME_OF_SERVER" master_avatar_uuid="00000000-0000-0000-0000-000000000000" estate_covanant_uuid="00000000-0000-0000-0000-000000000000" master_avatar_first="FIRST_NAME" master_avatar_last="SECOND_NAME" master_avatar_pass="PASSWORD" /> </Root> You must change UUID, NAME, IP_ADDRESS_OF_SERVER, DNS_NAME_OF_SERVER, FIRST_NAME, SECOND_NAME and PASSWORD to your own values. (I noticed than IP_ADDRESS_OF_SERVER should be set to real IP not to 127.0.0.1)
 * make sure you have X11 installed (installed by default on 10.5 and 10.6)
 * Very important to grab the latest Apple Dev Tools (3.2.1 on 8/9/09) (from - You will need a developer account, it is free.
 * install Mono Framework 2.4 (version 2.4.2.3 on 8/9/09) from Or perhaps the latest stable release.
 * install Mac Ports from
 * Mac Ports should update its packages on install, but to be safe, type the following at the Terminal:
 * Use mac ports to install nant. (This should pull in everything you need. I think this will also try to install mono, but since I already had it installed, that errored on me. Don't worry about it though, it should install everything else you need.) At the Terminal type:
 * Get OpenSim source. I downloaded 0.6.6 from
 * Uncompress the download.
 * Compile OpenSim:
 * Then of course the issue with the 0.6.6 release.

Summary:


 * Run OpenSim0.6.6Setup.exe and install OpenSim in Windows
 * Run OpenSim.exe and enter default values - record them!
 * Shutdown simulator (command: shutdown)
 * Create default.xml with copy of above
 * Change values in default.xml with recoded values
 * Be sure default.xml be in main directory (same with OpenSim.ini)
 * Run again OpenSim.exe
 * Connect with viewer

FreeBSD 6.2
su cd /usr/ports/devel/subversion/ && make install clean (you may also need to rebuild apr-svn if this step fails) cd /usr/ports/lang/mono/ && make install clean cd /usr/ports/devel/nant/ && make install clean cd /usr/ports/databases/sqlite3/ && make install clean cd /usr/ports/x11-toolkits/libgdiplus/ && make install clean cd /opensim/installation/directory/ Download opensim cd opensim ./runprebuild.sh nant

Note: Follow the instructions on the FAQ to fix the "System.DllNotFoundException: ./libopenjpeg-libsl-2.1.2.0.so" issue, but use "gmake" instead of "make"

For ODE Physics you must do the following: cd /usr/ports/graphics/libGL/ && make install clean cd /usr/ports/graphics/libGLU/ && make install clean cd /opensim/installation/directory/ svn co http://opensimulator.org/svn/opensim-libs/trunk opensim-libs cd opensim-libs/unmanaged/OpenDynamicsEngine2/ sh autogen.sh ./configure --enable-shared --enable-release --disable-demos make mv ./ode/src/.libs/libode.so /opensim/installation/directory/opensim/bin/

RedHat Enterprise Linux 4
sudo vi /etc/yum.repos.d/mono.repo

[mono] name=Mono for rhel-4-i386 (stable) baseurl=http://ftp.novell.com/pub/mono/download-stable/rhel-4-i386/ enabled=1 gpgcheck=0

sudo yum install mono-complete monodoc-core nant Download opensim cd opensim ./runprebuild.sh nant

RedHat Enterprise Linux 5
The instructions below also work on other RedHat Linux flavors such as CentOS or maybe Fedora.

1. Put the Mono.repo file in the /etc/yum.repo.d/ directory: $ sudo su - $ cd /etc/yum.repos.d/ $ wget http://download.opensuse.org/repositories/Mono/RHEL_5/Mono.repo Naturally use the most up-to-date link for your distribution.

2. Install Mono and related tools with yum: $ yum install mono nant mono-jscript mono-nunit Make sure to use nunit-console2 to run your tests.

Fedora 12 &amp; 13
Fedora 12 and 13 installs are fairly simple. Nant and Mono now work out of the box with OpenSim. Incase you are completley new to this, here is a complete step by step guide to run OpenSim on a base install of Fedora (bare minimum of packages). It will also work on GUI installs.

1. yum install wget nano nant libgdiplus mono-devel mono-jscript

2. Download opensim (wget http://dist.opensimulator.org/opensim-0.7.0.1-source.tar.gz)

3. tar -xf opensim-0.7.0.1-source.tar.gz

4. mv opensim-0.7.0.1-source opensim

5. cd opensim

6. ./runprebuild.sh

7. nant

8. cd /bin

9. cd /config-include/

10. cp StandaloneCommon.ini.example StandaloneCommon.ini

11. cd ..

12. cp OpenSim.ini.example OpenSim.ini

13. mono OpenSim.exe

Fedora 5

 * I needed to build latest mono and nant from sources to build OpenSim successfully, the ones available in yum repository didn't work so I had to uninstall and build and configure the packages.

For detailed instructions go here

Debian 4
For detailed instructions please see Debian 4 Build Instructions

Debian 5
1. Install Debian in the usual way. In the package list choose just the last option - 'Standard system' Leave all other install options unchecked unless you have other reason to install them.

2. Log in as your root user make sure it works.

3. type: aptitude update (or apt-get update)

4. type: aptitude install nant and answer 'y' to 'Do you want to continue'- This will install nant and all of its dependancies.

5. type: apt-get install git-core and answer 'y' to 'Do you want to continue'.

6. type: aptitude install build-essential swig autoconf gawk mono-common binfmt-support bison libglib2.0-dev gettext and answer 'y' to 'Do you want to continue'

7. type: wget http://ftp.novell.com/pub/mono/sources/mono/mono-2.4.3.tar.bz2 to download mono

8. type: tar xf mono-2.4.3.tar.bz2 to extract the mono source code to a directory (substitute the latest build)

9. type: cd mono-2.4.3 to change int the directory you just created

10. type: ./configure --with-libgdiplus=yes - wait for it to finish

11. type: make - and wait some more as this takes a bit - moreso on older machines

12. type: make install

13. type: cd /

14 type: git clone git://opensimulator.org/git/opensim

15 type: cd opensim

16. type: git checkout -b 0.6.8-post-fixes origin/0.6.8-post-fixes (substitute the latest build)

17. type: git pull

18. type: apt-get -u upgrade and answer 'y' to 'do you want to continue?'. This will update all packages to their latest versions via apt (it will not upgrade opensim or mono as they were compiled seperately)

19. Reboot, just to make sure it all comes up cleanly (type: shutdown -r now)

20. Login, type: cd /

21. type: cd opensim

22. type: ./runprebuild.sh

23 type: nant - wait for this to finish

24. type: cd bin

25. type: cp OpenSim.ini.example OpenSim.ini

26. type: mono OpenSim.exe

27. Answer the onscreen wizard promts and Opensim will start in standalone mode.

To add MySql support type: apt-get install mysql-server and answer 'y' to 'Do you want to Continue'. You will be prompted for a password for the MySQL root user, enter it twice as requested. Edit OpenSim.ini to use MySql as directed elsewhere.

Debian testing/unstable (will be Debian 7)
Updated 2011 March 21

1. Install Debian see http://www.debian.org/. This is the most difficult and longest step in our list, but there are many resources to help you through if this is your first time.

2. Log in as your root user make sure it works.

3. type: `aptitude update' (or `apt-get update')

4. type: `aptitude install nant git build-essential swig autoconf gawk mono-complete binfmt-support bison gettext' and answer 'y' to 'Do you want to continue'

5. type: `apt-get -u upgrade' and answer 'y' to 'do you want to continue?'. This will update all packages to their latest versions via apt. You can run this command again later to keep your system up to date. This will not upgrade OpenSim as you will be compiling that separately. Later, when you need to know more about running a Debian system, install debian-reference `apt-get install debian-reference' and point a web browser at /usr/share/doc/debian-reference-common/html/index.en.html This document is book length.

6. Reboot, just to make sure it all comes up cleanly (type: `shutdown -r now')

7. Login, type: `cd /usr/src'

8. type: `git clone git://opensimulator.org/git/opensim'

9. type: `cd opensim'

10. type: `git branch -r' will show you the available branches in the remote repository. You want the most recent release which will be listed as something like "origin/0.7.0.2-release"

11. type: `git checkout -b 0.7.0.2-release origin/0.7.0.2-release'

12. type: `git pull'

13. type: `./runprebuild.sh'

14. type: `nant' - wait for this to finish

15. type: `cd bin'

16. type: `cp OpenSim.ini.example OpenSim.ini' (The [Architecture] section is what determines if you will be running standalone or grid server.  You want the standalone variant.)

17. type: `cd config-include'

18. type: `cp StandaloneCommon.ini.example StandaloneCommon.ini' See http://opensimulator.org/wiki/Configuration for more information about configuring OpenSim

19. type: `mono OpenSim.exe'

20. The startup wizard will ask you a number of questions. The defaults are fine but you can fill these in to your taste:

region name, estate name, owner first name, owner last name, owner password, and owner email

Opensim will then finish starting and leave you at a prompt which looks like:

Region (regionName) #

You can now connect to your server using a client.

CentOS 5.2 32bit
For detailed instructions please see CentOS 5.2 Build Instructions

CentOS 5.3 32bit
For detailed installation and configuration instructions please see this blog

Running
Recent versions of OpenSim come without an OpenSim.ini</tt> file. Copy the OpenSim.ini.example</tt> file to OpenSim.ini</tt> before making any changes.

Note: if you are running a 64 bit Windows OS serveryou need the alternative launcher: