@till I got really confused. Witch part of the tutorial do I need to follow for all servers and witch part only on the ones with specific role (DNS, DB...)
@till So, this tutorial until step 7 (not including step 7): https://www.howtoforge.com/tutorial/perfect-server-debian-8-jessie-apache-bind-dovecot-ispconfig-3/ And then tutorial on the link you posted (only that page)? Also, what did @florian030 mean by 'merging the data' when converting from single server to multi server setup? I'm sorry for (probably) being pain in the ass but I just want to do it the right way.
You wanted to migrate 3 single-servers into 1 multiserver-setup (with 1 interface). you can merge the data in the database. but i don´t think (don´t get me wrong) that you have the knowledge.
@florian030 Don't you think that you got all this 'support' thing wrong? Aren't you supposed to explain how to do it? Please, don't get me wrong, but you should really look up to @till He has never missed the point (and, please, don't get me wrong) unlike you have, at almost every 'support' post you had towards me. I NEVER had to explain to @till one and the same thing (and again, PLEASE, don't get me wrong) more than once. And @till never forgot (yet again, don't get me wrong) to answer any of my questions, no matter how 'uneducated' they met be. So, please, ether start act like member of the support staff or (and now really don't get me wrong) stop engaging with solving problems. And let me explain, yet again: I didn't want to migrate 3 single servers into one multi server with one interface. I asked you if I will lose my data if I convert to a multi server environment - but answering that was, I'm guessing, beneath you.
My link was for the question on how to install a single dns node. The link that I posted contains all required instructions on one page to install a dns node. The starting point is a debian minimal server.