Let's Make A Dir For VRS:

mkdir vrs
cd vrs

Now Let's Download And Unpack The Following Software:
Run Each Line One At A Time:

wget http://www.virtualradarserver.co.uk/Files/VirtualRadar.tar.gz
wget http://www.virtualradarserver.co.uk/Files/VirtualRadar.LanguagePack.tar.gz
wget http://www.virtualradarserver.co.uk/Files/VirtualRadar.WebAdminPlugin.tar.gz

Now Unpack The Software:
Run Each Line One At A Time:

tar xvf VirtualRadar.tar.gz
tar xvf VirtualRadar.LanguagePack.tar.gz
tar xvf VirtualRadar.WebAdminPlugin.tar.gz

To Fix The Mono 4 Error:

cd vrs

nano VirtualRadar.exe.config

Paste The Following And Save:

<?xml version="1.0"?>
<configuration>
    <configSections>
    </configSections>
    <startup>
        <supportedRuntime version="v2.0.50727"/>
    </startup>
    <runtime>
        <assemblyBinding  xmlns="urn:schemas-microsoft-com:asm.v1">
            <dependentAssembly>
                <assemblyIdentity name="Mono.Data.Sqlite"
                                  publicKeyToken="0738eb9f132ed756"
                                  culture="neutral" />
                <bindingRedirect oldVersion="2.0.0.0"
                                 newVersion="4.0.0.0" />
            </dependentAssembly>
        </assemblyBinding>
    </runtime>
</configuration>


Run The Following Command And Edit Username And Password:

mono VirtualRadar.exe -nogui -createAdmin:user -password:passwd

To Start VRS:

GUI:
mono VirtualRadar.exe

No GUI:
mono VirtualRadar.exe -nogui