Hello,
I am not sure at which point you are asking this question.
What have you done so far?
1st you need to install privacyidea.
There are several ways to do this, this depends on your needs and
your taste.
You might take the ready made ubuntu packages
(
https://www.privacyidea.org/how-to-install-privacyidea-otp-server-on-ubuntu-14-04/)
or you can install it using PIP on any other system also using the
latest python modules.
You can then authenticate with the URL like this
https://server/openid/id/<user>
Unfortunately there is no step by step guide, but I am happy to
respond to more specific questions.
Kind regards
Cornelius