Hassio command not available in hass.io installation

Hello.
I have installed a hassio on Ubuntu Xenial host with the following installation procedure - https://www.home-assistant.io/hassio/installation/#preparation
It is about docker install and other software and then run curl -sL "https://raw.githubusercontent.com/home-assistant/hassio-installer/master/hassio_install.sh" | bash -s
hass.io got installed but the command line utility hassio is not available. Any suggestions how to fix?

Regards.

You need to install the SSH add-on, and the command will be available in there.

That is correct.