I've ran by steps in
https://grandnode.com/how-to-install-grandnode-on-linux-ubuntu-1604#linux-source-code-installation
once plugin  Plugins/Grand.Plugin.Widgets.FacebookPixel   stucked on

  
  Restore completed in 323.48 ms for /home/opc/source/grandnode/Grand.Core/Grand.Core.csproj.
  Restore completed in 327.04 ms for /home/opc/source/grandnode/Grand.Api/Grand.Api.csproj.
  Restore completed in 6.12 ms for /home/opc/source/grandnode/Grand.Framework/Grand.Framework.csproj.
  Restore completed in 13.76 ms for /home/opc/source/grandnode/Grand.Services/Grand.Services.csproj.
  Restore completed in 4.57 ms for /home/opc/source/grandnode/Grand.Web/Grand.Web.csproj.
  Restore completed in 4.37 ms for /home/opc/source/grandnode/Plugins/Grand.Plugin.Widgets.FacebookPixel/Grand.Plugin.Widgets.FacebookPixel.csproj.
  Grand.Core -> /home/opc/source/grandnode/Grand.Core/bin/Debug/netcoreapp3.1/Grand.Core.dll
  Grand.Services -> /home/opc/source/grandnode/Grand.Services/bin/Debug/netcoreapp3.1/Grand.Services.dll
  Grand.Framework -> /home/opc/source/grandnode/Grand.Framework/bin/Debug/netcoreapp3.1/Grand.Framework.dll
  Grand.Api -> /home/opc/source/grandnode/Grand.Api/bin/Debug/netcoreapp3.1/Grand.Api.dll

  Next plugin also stucked with no message:

  
  Restore completed in 419.25 ms for /home/opc/source/grandnode/Grand.Core/Grand.Core.csproj.
  Restore completed in 420.17 ms for /home/opc/source/grandnode/Grand.Framework/Grand.Framework.csproj.
  Restore completed in 7.34 ms for /home/opc/source/grandnode/Grand.Services/Grand.Services.csproj.
  Restore completed in 4.74 ms for /home/opc/source/grandnode/Plugins/Grand.Plugin.Widgets.GoogleAnalytics/Grand.Plugin.Widgets.GoogleAnalytics.csproj.
  Grand.Core -> /home/opc/source/grandnode/Grand.Core/bin/Debug/netcoreapp3.1/Grand.Core.dll
  Grand.Services -> /home/opc/source/grandnode/Grand.Services/bin/Debug/netcoreapp3.1/Grand.Services.dll
  Grand.Framework -> /home/opc/source/grandnode/Grand.Framework/bin/Debug/netcoreapp3.1/Grand.Framework.dll

Also it is stucked on publishing

$ sudo dotnet publish Grand.Web -c Release -o /var/webapps/grandnode
Microsoft (R) Build Engine version 16.4.0+e901037fe for .NET Core
Copyright (C) Microsoft Corporation. All rights reserved.

  Restore completed in 741.57 ms for /home/opc/source/grandnode/Grand.Core/Grand.Core.csproj.
  Restore completed in 699.21 ms for /home/opc/source/grandnode/Grand.Api/Grand.Api.csproj.
  Restore completed in 4.57 ms for /home/opc/source/grandnode/Grand.Framework/Grand.Framework.csproj.
  Restore completed in 135.31 ms for /home/opc/source/grandnode/Grand.Services/Grand.Services.csproj.
  Restore completed in 29.56 ms for /home/opc/source/grandnode/Grand.Web/Grand.Web.csproj.

I've tried it on two differend VPS (RHEL and Oracle Linux) using dnf instead of apt-get - the same result.

It may be something directly related to the Linux Distribution. On Ubuntu, we haven't noticed similar problems. We will investigate it.

Edit/ Grigory, can you check the memory usage? I suppose after some time waiting in the place where you took the last screenshot, you will receive the error code 137. This means that process has been killed because it ran out of the memory.