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Like as dotnet/dotnet-docker#1537 but I have same error on CenOS 8 (not Docker) on standalone machine. Clean new CentOS 8 with latest updates on 23 dec 2020. in console:

sudo dnf install aspnetcore-runtime-3.1 - OK

dotnet - OK (shows using manual)

dotnet --info - error:

A fatal error occurred, the folder [/usr/share/dotnet/host/fxr] does not contain any version-numbered child folders

dotnet --list-runtimes - error: A fatal error occurred, the folder [/usr/share/dotnet/host/fxr] does not contain any version-numbered child folders

dotnet *.dll - error: A fatal error occurred, the folder [/usr/share/dotnet/host/fxr] does not contain any version-numbered child folders

the folder /usr/share/dotnet/host/fxr is really empty. Trying to install SDK - no effect

Zhivov.Oleg
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2 Answers2

3

If the dotnet sdk is version 5.0

step 1.- Remove sdk

sudo dnf remove dotnet-sdk-5.0

step 2.- remove folders

sudo rm -rf /usr/share/dotnet
sudo rm -rf /usr/bin/dotnet
sudo rm -rf /etc/yum.repos.d/microsoft-prod.repo

step 4.- Clean and upgrade.

sudo dnf clean all
sudo dnf upgrade

step 5.- Reboot system

sudo init 6

step 6.- Finally

sudo dnf install dotnet-sdk-5.0
Jhonny Ramirez Zeballos
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1

I had the same problem after updating my system to Fedora 32. The problem was, that I had installed dotnet-runtime-2.1 before, but Fedora 32 comes with 3.1 included.

If your dotnet application is compatible with 3.1, you can simply uninstall the old runtime. That's how I did it:

  1. Check installed dotnet runtimes:
$ rpm -qa | grep dotnet
dotnet-runtime-2.1-2.1.12-1.x86_64
dotnet-runtime-deps-2.1-2.1.12-1.x86_64
dotnet-hostfxr-2.1-2.1.12-1.x86_64
dotnet-host-3.1.10-1.fc32.x86_64

In my case, version 2.1 was installed by myself. 3.1 was installed by the system (tagged with fc32)

  1. Remove the old version:
dnf remove dotnet-runtime-2.1
  1. To install 2.1, I had to add the microsoft repo before, which is not needed anymore:
rm /etc/yum.repos.d/microsoft-prod.repo
  1. For some unknown reason, uninstalling 2.1 also uninstalled 3.1. Install it as you usually would:
 dnf install dotnet-runtime-3.1
  1. dotnet --info should work again.

For more information or if your application requires dotnet 2.1:

https://github.com/dotnet/core/issues/4655

ZuBsPaCe
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