How to fix dotnet ef tool, .NET Location not found

Question

I created a .net core 7 project using the entity framework core. Well, at that time I installed .net core 6 so my global ef tool was still version 6, then I updated to version 7. Here I had a problem, it said that I had not installed the framework. I decide to uninstall dotnet. Then I reinstalled sdk 7 and global ef tools. And new error appear. I try reinstall many times. But still like this, now I can't use the ef tool.

This is dotnet --info

    .NET SDK:
 Version:   7.0.101
 Commit:    bb24aafa11

Runtime Environment:
 OS Name:     ubuntu
 OS Version:  22.04
 OS Platform: Linux
 RID:         ubuntu.22.04-x64
 Base Path:   /usr/share/dotnet/sdk/7.0.101/

Host:
  Version:      7.0.1
  Architecture: x64
  Commit:       97203d38ba

.NET SDKs installed:
  7.0.101 [/usr/share/dotnet/sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.App 7.0.1 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 7.0.1 [/usr/share/dotnet/shared/Microsoft.NETCore.App]

Other architectures found:
  None

Environment variables:
  DOTNET_ROOT       [/usr/lib/dotnet]

global.json file:
  Not found

Learn more:
  https://aka.ms/dotnet/info

Download .NET:
  https://aka.ms/dotnet/download

And this is the error,

You must install .NET to run this application.

App: /home/apriza/.dotnet/tools/dotnet-ef
Architecture: x64
App host version: 7.0.1
.NET location: Not found

Learn about runtime installation:
https://aka.ms/dotnet/app-launch-failed

Download the .NET runtime:
https://aka.ms/dotnet-core-applaunch?missing_runtime=true&arch=x64&rid=ubuntu.22.04-x64&apphost_version=7.0.1

Answer 1

I found the answer; I change the Root dotnet env which is in /usr/share/dotnet for dotnet 7.

export `DOTNET_ROOT=/usr/share/dotnet`