Rudder

You are right, this part of the documentation should be improved.

Basically, yes you must do it via git, the quick'n'dirty way which is:

cd /var/rudder/configuration-repository/techniques
cp -a /opt/rudder/share/techniques/* .
git add .
git commit -m "Dennis: Upgrade the Rudder Techniques" 

And then, in the Rudder interface, in the "Configuration Policy -> Techniques" pane, click on the big "Reload" button.

This is to be done ONLY if you did not customize any technique in the standard Rudder tree, if not please tell me the ones you did modify so I can adapt the commands.

I will also update the documentation with this procedure so there is no confusion anymore.

This is documented in http://www.rudder-project.org/rudder-doc-2.10/rudder-doc.html#_about_technique_upgrades