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3

How can I install dotnet Core 3.1 runtime on Ubuntu 22.04?

rated 0 times [ 3] [ 0] / answers: 1 / hits: 6395 / 1 Year ago, fri, march 31, 2023, 2:30:02

I have two Ubuntu 22.04 systems with Dotnet 6.0. The one that has been continuously upgraded from older versions of Ubuntu runs my Dotnet Core 3.1 app without any trouble -- because it still has the old runtime (and libssl1.1) that are no longer available for 22.04.

The one running in WSL (i.e., Ubuntu under Windows) has the dotnet6.0 package, libssl1.1 downloaded from packages.ubuntu.com/focus, and aspnetcore-runtime-3.1 from microsoft .

But dotnet --info:

.NET SDK (reflecting any global.json):

 Version:   6.0.108

 Commit:    4e3a463d2b



Runtime Environment:

 OS Name:     ubuntu

 OS Version:  22.04

 OS Platform: Linux

 RID:         ubuntu.22.04-x64

 Base Path:   /usr/lib/dotnet/dotnet6-6.0.108/sdk/6.0.108/



global.json file:

  Not found



Host:

  Version:      6.0.8

  Architecture: x64

  Commit:       55fb7ef977



.NET SDKs installed:

  6.0.108 [/usr/lib/dotnet/dotnet6-6.0.108/sdk]



.NET runtimes installed:

  Microsoft.AspNetCore.App 6.0.8 [/usr/lib/dotnet/dotnet6-6.0.108/shared/Microsoft.AspNetCore.App]

  Microsoft.NETCore.App 6.0.8 [/usr/lib/dotnet/dotnet6-6.0.108/shared/Microsoft.NETCore.App]

Even though the runtime shows at /usr/share/dotnet/shared/Microsoft.NETCore.App/3.1.28/

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answered 1 Year ago rvousnove · Accepted Answer

It turns out the Ubuntu choices for SDK and runtime location are incompatible with Microsoft's. So, it's nice to have the dotnet6 package to pull in all the packages, but the ones you want are actually Microsoft's! The key is to first create an apt preferences file:

derbro@L21PS773:~$ cat /etc/apt/preferences.d/dotnet.pref

Package: *                                                                                                                                                                                  

Pin: origin "packages.microsoft.com"                                                                                                                                                        

Pin-Priority: 1001

(which my working system already had based on instructions for making Dotnet 6.0 work, at Why don't any of these methods work for installing .Net Core SDK & runtime on 22.04 (Jammy Jellyfish)?. I actually didn't have a problem getting Dotnet 6 to work on this WSL installation, I just couldn't make it find the 3.1 runtime)

Now, install the 3.1 runtime or SDK per MS instructions:

wget https://packages.microsoft.com/config/ubuntu/20.04/packages-microsoft-prod.deb -O packages-microsoft-prod.deb

sudo dpkg -i packages-microsoft-prod.deb

rm packages-microsoft-prod.deb

sudo apt-get update

sudo apt-get install -y aspnetcore-runtime-6.0

#or

sudo apt-get install -y dotnet-sdk-3.1

(if either fail to install because you're missing libssl1.1, you'll have to get that from https://packages.ubuntu.com/focal/libssl1.1 and install with dpkg --install)

Then upgrade your MS sources:

wget https://packages.microsoft.com/config/ubuntu/22.04/packages-microsoft-prod.deb -O packages-microsoft-prod.deb

sudo dpkg -i packages-microsoft-prod.deb

rm packages-microsoft-prod.deb

sudo apt-get update

and install (or reinstall) dotnet6

sudo apt install dotnet6