With the release of .NET 9, Ubuntu users can now take advantage of improved performance, better cloud-native support, and updated tooling. In this guide, you’ll learn how to install .NET 9 SDK and .NET 9 Runtime on any Ubuntu-based system using Snap, script installation, or APT.

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🔍 Why Install .NET 9?

.NET 9 brings major improvements, including:

• Faster execution performance
• Enhanced container support
• New C# features
• Better cross-platform compatibility

If you’re building modern APIs, microservices, or cloud applications, .NET 9 is the recommended version.

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⭐ Method 1: Install .NET 9 Using Snap (Fast & Easy)

Snap packages are the simplest way to install .NET on Ubuntu since they come directly from Microsoft.

Step 1 — Install the .NET 9 SDK

sudo snap install dotnet-sdk --classic --channel=9.0
sudo snap alias dotnet-sdk.dotnet dotnet

You should see something like:

dotnet-sdk (9.0/stable) from Microsoft .NET Core installed

Step 2 — Install the .NET 9 Runtime

sudo snap install dotnet-runtime-90 --classic
sudo snap alias dotnet-runtime-90.dotnet dotnet

Step 3 — Export DOTNET_ROOT

export DOTNET_ROOT=/snap/dotnet-sdk/current

Step 4 — Check Installation

dotnet --info

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⭐ Method 2: Scripted Install (Perfect for CI/CD or Non-Sudo Use)

The official install script lets you install .NET 9 locally without needing root access.

Step 1 — Download the Script

wget https://dot.net/v1/dotnet-install.sh

Step 2 — Install .NET 9

bash dotnet-install.sh -c 9.0

This installs .NET 9 inside your user directory.
No system-wide changes needed.

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⭐ Method 3: Install .NET 9 Using APT (Recommended Traditional Method)

Step 1 — Add Required Repository

sudo add-apt-repository universe

Step 2 — Enable HTTPS Transport

sudo apt-get install apt-transport-https

Step 3 — Add Microsoft Package Repository

wget https://packages.microsoft.com/config/ubuntu/$(lsb_release -rs)/packages-microsoft-prod.deb
sudo dpkg -i packages-microsoft-prod.deb

Step 4 — Update Package List

sudo apt-get update

Step 5 — Install .NET 9 SDK

sudo apt-get install dotnet-sdk-9.0

To install only the runtime:

sudo apt-get install dotnet-runtime-9.0

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⭐ Alternative: Manual Download

You can manually download .NET 9 from the official site:

➡️ https://dotnet.microsoft.com/en-us/download/dotnet/9.0

Useful for offline machines or portable development environments.

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Final Thoughts

Installing .NET 9 on Ubuntu is straightforward once you choose the right method:

Method	Best For
Snap	Quick install, beginners
Script	CI/CD, no-sudo environments
APT	Stable production setups

With .NET 9 installed, you’re ready to build modern cloud-native apps on Ubuntu!