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Installing .NET 6 on Ubuntu 22.04 (Jammy) · Issue #7699 · dotnet/core · GitHub

Installing .NET 6 on Ubuntu 22.04 (Jammy)

We announced support for .NET 6 on Ubuntu 22.04 with our May 2022 Updates. At that time, the supported installation methods were manual installation via a tarball or a .deb package via packages.microsoft.com (PMC). .NET 6 is now available natively via Jammy feeds, which can cause conflicts with PMC feeds. You need to apply the following guidance to install .NET 6 reliably and correctly on Ubuntu 22.04+.

More information will be shared shortly on .NET 6 being available natively in the jammy-updates feed. In general, we recommend that you use the native packages from this feed since it is much easier and simpler.

You can use one of the following scenarios:

The first two scenarios assume a clean machine. You want .NET 6 packages and haven't installed them before.
The second two scenarios assume you're machine is in a mixed-state, that you've installed .NET 6 packages before and don't have the ones you want or are in a bad state.

Installing Powershell and .NET 6 on Ubuntu 22.04 (Jammy) #7713

Clean machine scenario 1: Use .NET 6 Package via Jammy feed

The easiest approach is to use the .NET 6 package available in Jammy feeds. In this scenario, just install dotnet6 and don't register the PMC feed.

You can do that via the following commands:

sudo apt update && sudo apt -y install dotnet6

You can see this demonstrated with Docker:

$ docker run --rm -it ubuntu:jammy
root@4c9d58f507a3:/# apt update && apt install -y dotnet6
root@444999ffd672:/# dotnet --version
6.0.108

Note: This build of .NET 6 is for the 6.0.1xx band. 6.0.4xx builds are available via PMC. That difference matters most to Windows users. Both builds are supported.

Clean machine scenario 2: Use .NET 6 Package via PMC

You can install .NET 6 on Ubuntu 22.04 from packages.microsoft.com using the following steps:

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

Configure apt preferences, to prioritize PMC repository, by creating the following file: /etc/apt/preferences

To create the file:

sudo touch /etc/apt/preferences

with contents:

Package: *
Pin: origin "packages.microsoft.com"
Pin-Priority: 1001

Update your APT information:

sudo apt update

Install .NET SDK 6.0:

sudo apt install dotnet-sdk-6.0

Mixed state scenario 1: Use native Jammy packages after installing a previous .NET release from PMC

You may want to switch to using the .NET 6 package available in Jammy after installing .NET 6 from PMC.

Do the following:

Remove all .NET packages

sudo apt remove --purge dotnet*
sudo apt remove --purge aspnetcore*

Delete PMC repository from APT, using any of the typical methods, for instance by deleting the repo .list file

sudo rm /etc/apt/sources.list.d/microsoft-prod.list

Update APT

sudo apt update

Install .NET SDK 6.0

sudo apt install dotnet-sdk-6.0

Mixed state scenario 2: Use PMC packages after installing native Jammy packages

You may want to switch to using packages.microsoft.com packages after installing native packages, potentially because you want to use 6.0.4xx builds.

Do the following:

Remove all .NET packages

sudo apt remove --purge dotnet*
sudo apt remove --purge aspnetcore*

Create apt preferences file as specified in the section above
Install .NET SDK 6.0

sudo apt install dotnet-sdk-6.0

How to identify which packages you'd installed

We'll install .NET 6 with both feeds, from a clean state, and then point the various ways you can identify which feed you installed the package from.

First, let's install the native Jammy packages using the "Clean machine scenario 1" guidance.

rich@kamloops:~$ docker run --rm -it ubuntu:jammy
root@db7fd8ec177e:/# apt update && apt install -y dotnet6
Get:18 http://archive.ubuntu.com/ubuntu jammy-updates/universe amd64 dotnet6 amd64 6.0.108-0ubuntu1~22.04.1 [20.5 kB]
root@db7fd8ec177e:/# 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]

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

Learn about .NET Runtimes and SDKs:
  https://aka.ms/dotnet/runtimes-sdk-info

Notice that we've installed .NET SDK 6.0.108, installed to /usr/lib/dotnet/, and that the dotnet6 package is being installed from http://archive.ubuntu.com/ubuntu jammy-updates/universe. That's expected for the native packages.

Let's try the same thing with PMC, but with the "Clean machine scenario 2" guidance.

rich@kamloops:~$ docker run --rm -it ubuntu:jammy
root@626dcadc888b:/# apt update && apt install -y wget 
root@626dcadc888b:/# wget https://packages.microsoft.com/config/ubuntu/22.04/packages-microsoft-prod.deb -O packages-microsoft-prod.deb
root@626dcadc888b:/# dpkg -i packages-microsoft-prod.deb
root@626dcadc888b:/# rm packages-microsoft-prod.deb
root@626dcadc888b:/# touch /etc/apt/preferences
root@626dcadc888b:/# echo "Package: *" >> /etc/apt/preferences
root@626dcadc888b:/# echo "Pin: origin \"packages.microsoft.com\"" >> /etc/apt/preferences
root@626dcadc888b:/# echo Pin-Priority: 1001 >> /etc/apt/preferences
root@626dcadc888b:/# cat /etc/apt/preferences
Package: *
Pin: origin "packages.microsoft.com"
Pin-Priority: 1001
root@626dcadc888b:/# apt update && apt -y install dotnet-sdk-6.0
Get:11 https://packages.microsoft.com/ubuntu/22.04/prod jammy/main amd64 dotnet-sdk-6.0 amd64 6.0.400-1 [86.4 MB]
root@626dcadc888b:/# dotnet --info
.NET SDK (reflecting any global.json):
 Version:   6.0.400
 Commit:    7771abd614

Runtime Environment:
 OS Name:     ubuntu
 OS Version:  22.04
 OS Platform: Linux
 RID:         ubuntu.22.04-x64
 Base Path:   /usr/share/dotnet/sdk/6.0.400/

global.json file:
  Not found

Host:
  Version:      6.0.8
  Architecture: x64
  Commit:       55fb7ef977

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

.NET runtimes installed:
  Microsoft.AspNetCore.App 6.0.8 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 6.0.8 [/usr/share/dotnet/shared/Microsoft.NETCore.App]

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

Learn about .NET Runtimes and SDKs:
  https://aka.ms/dotnet/runtimes-sdk-info

Notice that we've installed .NET SDK 6.0.400, installed to /usr/share/dotnet/, and that the dotnet6 package is being installed from https://packages.microsoft.com/ubuntu/22.04/prod jammy/main. That's expected for PMC packages.

We can also tell if the Microsoft PMC feed is registered:

root@626dcadc888b:/# ls /etc/apt/sources.list.d/
microsoft-prod.list
root@626dcadc888b:/# cat /etc/apt/sources.list.d/microsoft-prod.list 
deb [arch=amd64,arm64,armhf] https://packages.microsoft.com/ubuntu/22.04/prod jammy main

If you are using native packages, that file won't and shouldn't be present.

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