This 2nd `stage <https://github.com/iiab/iiab/wiki/IIAB-Contributors-Guide#ansible>`_ is for OS-level basics *common* to all platforms, i.e. core prerequisites to building up a functioning `Internet-in-a-Box (IIAB) <https://internet-in-a-box.org/>`_ server.
Recap: As with 0-init, 1-prep, 3-base-server, 4-server-options and 5-xo-services — this 2nd stage installs core server infra (that is not user-facing).