Many people equate the word “daemon” with the word “demon”, implying some kind of satanic connection between UNIX and the underworld. This is an egregious misunderstanding. “Daemon” is actually a much older form of “demon”; daemons have no particular bias towards good or evil, but rather serve to help define a person’s character or personality. The ancient Greeks’ concept of a “personal daemon” was similar to the modern concept of a “guardian angel”—eudaemonia is the state of being helped or protected by a kindly spirit. As a rule, UNIX systems seem to be infested with both daemons and demons.

From https://en.wikipedia.org/wiki/Daemon_(computing)

Removed by mod

Obsidian + Syncthing has been working prefectly for several years now for me, across Windows, Android and Linux.

The systemd website itself seems quite information-rich: https://systemd.io/

Take a look at Bunny ( https://bunny.net/dns/ ), they’re based in Europe with worldwide coverage, and have a lot of other useful services as well.