What are the wikis on basic linux setup?

Question

linux

Good afternoon!
I found a hosting provider on the Internet a long time ago (it seems German, but I'm not sure).
What attracted me was that there was a very detailed wiki on basic Linux setup for different systems and different situations (mail, web, firewall, databases). The wiki was in English, but written in a very accessible way.
Another of the features I remember is that the design of the site was in green colors, I don’t remember more details.
If anyone knows such a resource - or maybe a similar one - unsubscribe, I will be very grateful.

Answer 1

https://www.linode.com/wiki/index.php/Main_Page or is it?

Answer 2

https://digitalocean.com/community/articles/

Answer 3

Thank you!
It looks like it, but not really. Everything was more conveniently organized there, with its own structure on the left side of the screen

Answer 4

wiki.hetzner.de/index.php/Hauptseite/en isn't it?