dotnet new not working

Steps to reproduce

1. Create a new directory
2. Go to it with command prompt
3. Launch “dotnet new”

Expected behavior

A C# “hello world” program is generated

Actual behavior

Errors during nuget cache population (?)

C:\Users\fano\Documenti\test_dotnet_new>dotnet new

Welcome to .NET Core!
---------------------
Learn more about .NET Core @ https://aka.ms/dotnet-docs. Use dotnet --help to see available commands or go to https://aka.ms/dotnet-cli-docs.

Telemetry
--------------
The .NET Core tools collect usage data in order to improve your experience. The data is anonymous and does not include command-line arguments. The data is collected by Microsoft and shared with the community.
You can opt out of telemetry by setting a DOTNET_CLI_TELEMETRY_OPTOUT environment variable to 1 using your favorite shell.
You can read more about .NET Core tools telemetry @ https://aka.ms/dotnet-cli-telemetry.

Configuring...
-------------------
A command is running to initially populate your local package cache, to improve restore speed and enable offline access. This command will take up to a minute to complete and will only happen once.

Unhandled Exception: System.Exception: input .lzma is too short
   at Microsoft.DotNet.Archive.CompressionUtility.Decompress(Stream inStream, Stream outStream, IProgress`1 progress)
   at Microsoft.DotNet.Archive.IndexedArchive.Extract(String compressedArchivePath, String outputDirectory, IProgress`1 progress)
   at Microsoft.DotNet.Configurer.NuGetPackagesArchiver.ExtractArchive()
   at Microsoft.DotNet.Configurer.NuGetCachePrimer.PrimeCache()
   at Microsoft.DotNet.Configurer.DotnetFirstTimeUseConfigurer.Configure()
   at Microsoft.DotNet.Cli.Program.ConfigureDotNetForFirstTimeUse(INuGetCacheSentinel nugetCacheSentinel)
   at Microsoft.DotNet.Cli.Program.ProcessArgs(String[] args, ITelemetry telemetryClient)
   at Microsoft.DotNet.Cli.Program.Main(String[] args)

Environment data

.NET Command Line Tools (1.0.4)

Product Information: Version: 1.0.4 Commit SHA-1 hash: af1e6684fd

Runtime Environment: OS Name: Windows OS Version: 10.0.15063 OS Platform: Windows RID: win10-x64 Base Path: C:\Program Files\dotnet\sdk\1.0.4

I have used dotnet before without problems so you this “welcome” as if I never used it?

[fanoI]

Yes ‘dotnet new console’ creates the classical C# “hello world” for example.

[RZProf]

I have an error Failed to load �P�U, error: /usr/lib/libm.so.6: version GLIBC_2.27’ not found (required by /opt/dotnet/shared/Microsoft.NETCore.App/2.1.1/libcoreclr.so) Failed to bind to CoreCLR at ‘/opt/dotnet/shared/Microsoft.NETCore.App/2.1.1/libcoreclr.so’ i dont know what is it!!!