Getting-Started/Installation-and-Testing.md

@@ -49,6 +49,7 @@ The steps for installing BoSSS on Linux are:
 1.  Obtain [.NET5 SDK](https://dotnet.microsoft.com/download/dotnet/5.0), 
     see also https://docs.microsoft.com/de-de/dotnet/core/install/linux for the 
     most recent versions of BoSSS. 
+    See also [here](./NET5-Upgrade#installation-of-.net-5-in-linux:)
     <del> Obtain [Mono](https://fdy-tuda.openproject.com/www.mono-project.com) (version 6.0 or higher), either by installing a [pre-built package](https://fdy-tuda.openproject.com/www.mono-project.com/download/) or by [compiling](https://fdy-tuda.openproject.com/www.mono-project.com/docs/compiling-mono/linux/) it from a [tarball](https://download.mono-project.com/sources/mono/). </del>
 2.   Obtain/install/load OpenMPI 
 3.   Obtain/install/load native libraries `libBoSSSnative_seq.so`, `libBoSSSnative_omp.so` and `libBoSSSnative_mpi.so`