Installing the dotnet 7 SDK on Ubuntu Jammy seems to only install the runtime.

Describe the bug

On Ubuntu 22.04 LTS, dotnet build stopped working after the latest package updates. I removed the SDK and when reinstalling it, it seems to install the runtime and not the SDK, is it possible a package is mistagged?

Edit: it does install it, but in the wrong location (or missing an environment var).

To Reproduce

Have a ubuntu 22.04 (Jammy Jellyfish), without dotnet installed (in my case, after sudo apt remove 'dotnet*' 'aspnet*' 'netstandard*'). (I’ve never installed dotnet 6 on here, in case that matters).

Then attempt to install the latest dotnet 7 SDK

wget https://packages.microsoft.com/config/ubuntu/22.04/packages-microsoft-prod.deb -O packages-microsoft-prod.deb
&& dpkg -i packages-microsoft-prod.deb
&& rm packages-microsoft-prod.deb
&& apt update
&& apt install -y dotnet-sdk-7.0

Then run dotnet --info and see that No SKDs were found (but there is a runtime).

Exceptions (if any)

Before attempting to remove and reinstall the SDK, when running dotnet build I got an error that went something like “You must install or update .NET to run this application.”.

Further technical details

Running dotnet --info gives:

Host:
  Version:      7.0.5
  Architecture: x64
  Commit:       8042d61b17

.NET SDKs installed:
  No SDKs were found.

.NET runtimes installed:
  Microsoft.AspNetCore.App 7.0.5 [/usr/lib/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 7.0.5 [/usr/lib/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

I’m running this from the command line (bash).

[fhintsch]

The SDK is in the package but the search path used by dotnet is wrong.

I helped myself with this line

for f in /usr/share/dotnet/* ; do ln -s $f /usr/lib/dotnet ; done

[Mattias1]

Ah, that explains things. So if I understand it correctly this is what happened for me:

• I installed dotnet 7 on ubuntu jammy, using the ms package, as that was the only option for dotnet 7 back then. I didn’t do any of the ‘special multiple sources things’, as there was only one source.
• Now, dotnet 7 is released via ubuntu’s feed, and so there are now two sources, which means I need to do the ‘multiple sources things’
• I didn’t because I wasn’t aware of this, and boom

So uninstalling dotnet again, removing the ms package source and reinstalling via the ‘normal’ ubuntu source and everything works as expected. Slightly confusing as I don’t check twitter often anymore these days, but very cool that it’s available via the offical feed now!

For as far as I’m concerned this issue can be closed. Not sure if this is the same for any of the other people commenting though.

Thanks to Rich Lander and Chet Husk for looking into this.