Sure, here is a tutorial in markdown format for installing Klaus on NetBSD:

How to Install Klaus on NetBSD

Klaus is a simple, easy-to-set-up Git web viewer that can be used to browse Git repositories. In this tutorial, we will walk you through the process of installing Klaus on NetBSD.

Prerequisites

Before we get started with the installation, make sure you have the following prerequisites:

A NetBSD server or virtual machine
Git installed on the server

Step 1: Installing Klaus

Open up the terminal on the NetBSD machine.
Install Python and pip package management tool, by running the following command:
```
pkgin install python37 py37-pip
```
Once the installation is finished, run the following command to install Klaus using pip:
```
pip3.7 install klaus
```
Wait for Klaus to download and complete the installation.

Step 2: Configuring Klaus

After Klaus installation is complete, create a directory named klaus inside the /var/git/ directory:
```
mkdir /var/git/klaus
```
In the klaus directory, create a file named klaus.cfg:
```
touch /var/git/klaus/klaus.cfg
```
Edit the klaus.cfg file and add the following configuration parameters:
```
REPO_HOME = '/var/git'
USE_SMART_HTTP = True
```

Step 3: Running Klaus

Once the configuration is complete, run Klaus using the following command:
```
klaus --host 0.0.0.0 --port 8000 /var/git/klaus
```
Klaus should now be accessible on port 8000 on the server's IP address. If you are running NetBSD inside a virtual machine, you may need to forward port 8000 to access Klaus from your local machine.

Congratulations, you have successfully installed Klaus on NetBSD! You can now browse your Git repositories using Klaus.