Open a terminal.

Use snap install to install the .NET Runtime snap package. For example, the following command installs the .NET 8 runtime.

sudo snap install dotnet-runtime-80
Each .NET Runtime is published as an individual snap package. The following table lists the packages:
.NET version
Snap package
.NET version supported by Microsoft
2. Enable the dotnet command
When the .NET runtime snap package is installed, the dotnet command isn't automatically configured. Use the snap alias command to use the dotnet command from the terminal. The command is formatted as: sudo snap alias {package}.{command} {alias}. The following example maps the dotnet command:
sudo snap alias dotnet-runtime-90.dotnet dotnet
3. Export the install location
The DOTNET_ROOT environment variable is often used by tools to determine where .NET is installed. When .NET is installed through Snap, this environment variable isn't configured. You should configure the DOTNET_ROOT environment variable in your profile. The path to the snap uses the following format: /snap/{package}/current. For example, if you installed the dotnet-runtime-90 snap, use the following command to set the environment variable to where .NET is located:
export DOTNET_ROOT=/snap/dotnet-runtime-90/current
Export the environment variable permanently
The preceding export command only sets the environment variable for the terminal session in which it was run.
You can edit your shell profile to permanently add the commands. There are a number of different shells available for Linux and each has a different profile. For example:
Bash Shell: ~/.bash_profile, ~/.bashrc
Korn Shell: ~/.kshrc or .profile
Z Shell: ~/.zshrc or .zprofile
Edit the appropriate source file for your shell and add export DOTNET_ROOT=/snap/dotnet-runtime-90/current.
Troubleshooting
The dotnet terminal command doesn't work
Can't install Snap on WSL2
The dotnet terminal command doesn't work
Snap packages can map an alias to a command provided by the package. The .NET Runtime snap packages don't automatically lias the dotnet command. To alias the dotnet command to the snap package, use the following command:
sudo snap alias dotnet-runtime-90.dotnet dotnet
Substitute dotnet-runtime-90 with the name of your runtime package.
Can't install Snap on WSL2
systemd must be enabled on the WSL2 instance before Snap can be installed.
Open /etc/wsl.conf in a text editor of your choice.
Paste in the following configuration:
[boot]
systemd=true
Save the file and restart the WSL2 instance through PowerShell. Use the wsl.exe --shutdown command.
4. Use the .NET CLI
Open a terminal and type dotnet.
dotnet
You'll see output similar to the following:
Usage: dotnet [options]
Usage: dotnet [path-to-application]
Options:
  -h|--help         Display help.
  --info            Display .NET information.
  --list-sdks       Display the installed SDKs.
  --list-runtimes   Display the installed runtimes.
path-to-application:
  The path to an application .dll file to execute.
To learn how to use the .NET CLI, see .NET CLI overview.
Related content
.NET CLI overview
How to enable TAB completion for the .NET CLI.