Executing mlnet can't locate dotnet

System Information (please complete the following information):

• Model Builder or CLI Version:
• Visual Studio Version (if applicable): N/A

Describe the bug

• On which page of the tutorial did you run into an issue (URL): ML.NET Tutorial - Get started in 10 minutes
• Clear description of the problem: Running mlnet at the command line returns:

You must install .NET to run this application.

App: /home/dhild/.dotnet/tools/mlnet
Architecture: x64
App host version: 8.0.0
.NET location: Not found

When I run 'which dotnet' I get '/usr/bin/dotnet', so both this and the reporting of the App host version says that .NET is properly installed.
To Reproduce
Steps to reproduce the behavior:

1. Go to bash console
2. Enter 'mlnet classification --dataset "yelp_labelled.txt" --label-col 1 --has-header false --name SentimentModel --train-time 60'
3. See error

Expected behavior
Shown in Progress at https://dotnet.microsoft.com/en-us/learn/ml-dotnet/get-started-tutorial/train

Screenshots
N/A

Additional context
None

Start by reproducing the reported command in a bash console with the tutorial's yelp_labelled.txt dataset, then compare the result with the expected progress shown in the linked ML.NET tutorial. The issue names no source file or test; done means mlnet can locate the installed .NET runtime and run the classification command successfully.