Getting-Started/Installation-and-Testing.md

@@ -65,6 +65,27 @@ to verify that the installation works and the native libraries are in place. Fur
 * On Windows: `$BOSSS_INSTALL/bin/native/win/amd64`
 * On Linux: `$BOSSS_INSTALL/bin/native/linux/amd64-openmpi`
 
+If something fails one should first test that `dotnet` is working
+```
+flori@Stormbreaker MINGW64 /
+$ dotnet --list-runtimes
+ ...
+Microsoft.NETCore.App 2.1.26 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
+Microsoft.NETCore.App 3.1.13 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
+Microsoft.NETCore.App 5.0.1 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
+Microsoft.NETCore.App 5.0.4 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
+Microsoft.NETCore.App 5.0.9 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
+Microsoft.NETCore.App 6.0.1 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
+ ...
+
+flori@Stormbreaker MINGW64 /
+$ dotnet --list-sdks
+5.0.101 [C:\Program Files\dotnet\sdk]
+5.0.201 [C:\Program Files\dotnet\sdk]
+6.0.101 [C:\Program Files\dotnet\sdk]
+```
+For both components (runtime and SDK) at least some version 5.* is required.
+
 ## Installing Jupyter
 
 In order to use BoSSS properly, a working installation of [**Jupyter**](https://jupyter.org/) (aka. Jupiterlab, Jupyter-Notebkook, etc.) **with support for** [**dotnet-interactive**](https://github.com/dotnet/interactive) is required. Prior to the migration to .NET5, BoSSS used its own custom notebook format (`bws`, for BoSSS work sheet) and featured a notebook/worksheet editor embedded in [BoSSSpad](/bosss1/experimental/-/wikis/Getting-Started/BoSSSpad). Since Mid-2020, [dotnet-interactive](https://github.com/dotnet/interactive) is supported by Jupyter and reached a level of maturity so that it can replace the custom BoSSSpad solution. Although a dependency on an additional software component is a drawback (e.g. the user has to install and configure it) the advantages of a widely-used of-the-shelf solution with a large user-basis such as Jupyter outweigh the disadvantages.