Hello @johannes,
johannes The same applies to the following commands, as they produce the same errors.
Sure, thanks for your feedback.
This documentation was changed. We changed this documentation by adding info that the commands need to be run using root
user account.
On Ubuntu with default user settings, it will be for example:
sudo -i
and after logging in all commands can be executed.
Please let us know if you experience any problem with it.
Thanks.
Best regards,
Marcin Haba (gani)