Setup

This tutorial runs in your local terminal. Install the .NET 10 SDK first, then install the B2R2 launcher as a .NET global tool.

Install .NET SDK

B2R2 tutorial scripts and tools require the .NET 10 SDK. Installing the SDK is enough; you do not need a separate runtime installation.

Use Microsoft’s official pages for the current installer and OS-specific instructions:

• .NET 10 download page
• .NET install documentation

Check the SDKs available on your machine:

dotnet --info
dotnet --list-sdks

Install the latest .NET SDK with dotnet-install

If your package manager provides an older SDK than the latest .NET 10 SDK, you can install the latest SDK directly with Microsoft’s dotnet-install.sh script:

curl -sSL https://dot.net/v1/dotnet-install.sh -o dotnet-install.sh
bash dotnet-install.sh --channel 10.0 --quality GA

The script installs dotnet under $HOME/.dotnet. Add both the SDK directory and the .NET global tools directory to PATH:

export DOTNET_ROOT="$HOME/.dotnet"
export PATH="$HOME/.dotnet:$HOME/.dotnet/tools:$PATH"

Then verify the installed SDK:

dotnet --info
dotnet --list-sdks

Install the B2R2 CLI Tool

Install the B2R2 launcher from NuGet as a .NET global tool:

dotnet tool install --global B2R2.RearEnd.Launcher

If B2R2 is already installed, update it instead:

dotnet tool update --global B2R2.RearEnd.Launcher

PATH Notes

.NET global tools are installed into your user profile. If b2r2 is not found after installation, make sure the global tool directory is on PATH.

Windows PowerShell:

$env:PATH += ";$env:USERPROFILE\.dotnet\tools"

macOS and Linux:

export PATH="$PATH:$HOME/.dotnet/tools"

For a permanent setup, add the matching line to your shell profile.

Verify B2R2

Run the launcher help command from any local terminal:

b2r2 --help

Download Tutorial Files

Download the tutorial archive from the setup page:

Download tutorial.zip

After extracting the archive, you should have these directories:

cli/
findme/
evalme/
loginme/

The CLI tools page uses the cli/ directory. Each problem page uses the matching findme/, evalme/, or loginme/ directory.

Troubleshooting

dotnet not found: restart the terminal after installation, then confirm that the SDK install directory is on PATH.

b2r2 not found: add the .NET global tool directory to PATH, or reinstall the tool with dotnet tool install --global B2R2.RearEnd.Launcher.