.net 8 - dontet-ef doesn't work in Ubuntu

Question

I installed dotnet-sdk using snap in Ubuntu v.22.04. When I run dotnet --info here are the details:

    dotnet --info
.NET SDK:
 Version:           8.0.100
 Commit:            57efcf1350
 Workload version:  8.0.100-manifests.6c33ef20

Runtime Environment:
 OS Name:     ubuntu
 OS Version:  22.04
 OS Platform: Linux
 RID:         linux-x64
 Base Path:   /snap/dotnet-sdk/233/sdk/8.0.100/

.NET workloads installed:
 Workload version: 8.0.100-manifests.6c33ef20
There are no installed workloads to display.

Host:
  Version:      8.0.0
  Architecture: x64
  Commit:       5535e31a71

.NET SDKs installed:
  8.0.100 [/snap/dotnet-sdk/233/sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.App 8.0.0 [/snap/dotnet-sdk/233/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 8.0.0 [/snap/dotnet-sdk/233/shared/Microsoft.NETCore.App]

Other architectures found:
  None

Environment variables:
  DOTNET_ROOT       [/snap/dotnet-sdk/current]

the latest dotnet-sdk isn't available in ubuntu's feed; therefore, I had to install it using snap. I also have the DOTNET_ROOT env. variable setup because this is a known issue and the solution is outlined in this post.

After installing dotnet-ef by running dotnet tool install --global dotnet-ef, when I run dotnet ef, I get the following exception:

You must install or update .NET to run this application.

App: /home/akhakpouri_linux/.dotnet/tools/dotnet-ef
Architecture: x64
Framework: 'Microsoft.NETCore.App', version '8.0.1' (x64)
.NET location: /snap/dotnet-sdk/233

The following frameworks were found:
  8.0.0 at [/snap/dotnet-sdk/233/shared/Microsoft.NETCore.App]

Learn more:
https://aka.ms/dotnet/app-launch-failed

I've exhausted all resources and not sure what else to do.

Answer 1

For the record, if you're installing dotnet-sdk-8.0.xx using snap, you'll run into this issue no matter what you've set the DOTNET_ROOT to. The problem is that snap installs the sdk in /snap/dotnet-sdk instead of $home/.dotnet/sdk.

The only way I've been able to get both .net-sdk and dotnet-ef to work is to perform the followings:

• remove dotnet-sdk by snap remove dotnet-sdk
• remove .dotnet directory by rm ~/.dotnet
• remove rm /snap/dotnet or /rm /snap/dotnet-sdk if they exist.

You want to install the dotnet-sdk using script installation mentioned on microsfot's documentation. After running through the installation, make sure to follow the steps in Set environment variables system-wide here.