Why does "dotnet ef migrations add" throw a Win32Exception? - .net-core

Question

I have a dotnet core v3.1 project with an entity framework DbContext.
when I try to run:
dotnet ef migrations add someMigrationName
this Exception will be thrown:
System.ComponentModel.Win32Exception (2): No such file or directory
at System.Diagnostics.Process.ForkAndExecProcess(String filename, String[] argv, String[] envp, String cwd, Boolean redirectStdin, Boolean redirectStdout, Boolean redirectStderr, Boolean setCredentials, UInt32 userId, UInt32 groupId, UInt32[] groups, Int32& stdinFd, Int32& stdoutFd, Int32& stderrFd, Boolean usesTerminal, Boolean throwOnNoExec)
at System.Diagnostics.Process.StartCore(ProcessStartInfo startInfo)
at System.Diagnostics.Process.Start()
at System.Diagnostics.Process.Start(ProcessStartInfo startInfo)
at Microsoft.EntityFrameworkCore.Tools.Exe.Run(String executable, IReadOnlyList`1 args, String workingDirectory, Boolean interceptOutput)
at Microsoft.EntityFrameworkCore.Tools.Project.FromFile(String file, String buildExtensionsDir, String framework, String configuration, String runtime)
at Microsoft.EntityFrameworkCore.Tools.RootCommand.Execute(String[] _)
at Microsoft.EntityFrameworkCore.Tools.Commands.CommandBase.<>c__DisplayClass0_0.<Configure>b__0(String[] args)
at Microsoft.DotNet.Cli.CommandLine.CommandLineApplication.Execute(String[] args)
at Microsoft.EntityFrameworkCore.Tools.Program.Main(String[] args)
No such file or directory
My development environment is a Linux elementary os (Ubuntu 18.04.4 LTS) and rider IDE.
It may be irrelevant but when I try to debug my xunit tests it returns this warning and cannot start execution.
All of these commands work properly and show all options:
dotnet
dotnet ef
dotnet ef migrations
but when I use these options Exception raised:
dotnet ef migrations add
dotnet ef migrations list
Also, I run my command with verbose option and this is the output:
Using project '/media/navid/9bf0167c-d789-4e06-9e23-4023ec551745/Stuff/Work/SabaCell/venus/Venus.CustomerProfileManagement/Venus.CustomerProfileManagement.csproj'.
Using startup project '/media/navid/9bf0167c-d789-4e06-9e23-4023ec551745/Stuff/Work/SabaCell/venus/Venus.CustomerProfileManagement/Venus.CustomerProfileManagement.csproj'.
Writing '/media/navid/9bf0167c-d789-4e06-9e23-4023ec551745/Stuff/Work/SabaCell/venus/Venus.CustomerProfileManagement/obj/Venus.CustomerProfileManagement.csproj.EntityFrameworkCore.targets'...
dotnet msbuild /target:GetEFProjectMetadata /property:EFProjectMetadataFile=/tmp/tmpUud0Xf.tmp /verbosity:quiet /nologo /media/navid/9bf0167c-d789-4e06-9e23-4023ec551745/Stuff/Work/SabaCell/venus/Venus.CustomerProfileManagement/Venus.CustomerProfileManagement.csproj
System.ComponentModel.Win32Exception (2): No such file or directory
at System.Diagnostics.Process.ForkAndExecProcess(String filename, String[] argv, String[] envp, String cwd, Boolean redirectStdin, Boolean redirectStdout, Boolean redirectStderr, Boolean setCredentials, UInt32 userId, UInt32 groupId, UInt32[] groups, Int32& stdinFd, Int32& stdoutFd, Int32& stderrFd, Boolean usesTerminal, Boolean throwOnNoExec)
at System.Diagnostics.Process.StartCore(ProcessStartInfo startInfo)
at System.Diagnostics.Process.Start()
at System.Diagnostics.Process.Start(ProcessStartInfo startInfo)
at Microsoft.EntityFrameworkCore.Tools.Exe.Run(String executable, IReadOnlyList`1 args, String workingDirectory, Boolean interceptOutput)
at Microsoft.EntityFrameworkCore.Tools.Project.FromFile(String file, String buildExtensionsDir, String framework, String configuration, String runtime)
at Microsoft.EntityFrameworkCore.Tools.RootCommand.Execute(String[] _)
at Microsoft.EntityFrameworkCore.Tools.Commands.CommandBase.<>c__DisplayClass0_0.<Configure>b__0(String[] args)
at Microsoft.DotNet.Cli.CommandLine.CommandLineApplication.Execute(String[] args)
at Microsoft.EntityFrameworkCore.Tools.Program.Main(String[] args)
No such file or directory
this is the result of running dotnet --info in my environment:
.NET Core SDK (reflecting any global.json):
Version: 3.1.405
Commit: 3fae16e62e
Runtime Environment:
OS Name: elementary
OS Version: 5.1.7
OS Platform: Linux
RID: linux-x64
Base Path: /usr/share/dotnet/sdk/3.1.405/
Host (useful for support):
Version: 3.1.11
Commit: f5eceb8105
.NET Core SDKs installed:
3.1.405 [/usr/share/dotnet/sdk]
.NET Core runtimes installed:
Microsoft.AspNetCore.App 3.1.11 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 3.1.11 [/usr/share/dotnet/shared/Microsoft.NETCore.App]
To install additional .NET Core runtimes or SDKs:
https://aka.ms/dotnet-download

Answer 1

This helped me,
I deleted dotnet symlink in /usr/local/bin/ (macOS)

Answer 2

It didn't work for me removing the symlink.
I had to reinstall the dotnet-ef tool:
dotnet new tool-manifest
dotnet tool install dotnet-ef
That fixed the issue :)

Answer 3

I was able to solve this issue with #bjorn answer. there was a symlink in my /usr/local/bin pointing to /snap/..., back when I tried to install .net sdk with snap, which was not successful, so I tried a different approach. Just complementing #bjorn answer, this is what I did :
Check if you have a symlink :
ls -l /usr/local/bin/
It will look something like this :
lrwxrwxrwx 1 root root 54 jul 22 09:46 dotnet -> /snap/...
Then remove it :
sudo rm /usr/local/bin/dotnet