What does it mean all rights reserved?

It would have helped if you had provided a bit more information. It's hard to tell what the context is when you just quote a copyright from an anonymous file.

Anyhows, TurnKey is open source, not public domain. Yes we do reserve copyrights, and the licensing explains what you can or can't do. With most open source licenses you're not allowed to distribute closed source copies for example.

Anyhow, you can find the licensing for our custom packages under /usr/share/doc/<packagename>/copyright. I think most packages are GPL3.

You are right about the context. What I have quoted is the comment on hubservices.py . I would like to use it as a starting point for developing my own firstboot scripts. Since you say that everything is GPL, this is OK for me. Thanks for the clarification.