I simply forgot to type /mnt at the end (actually didn’t see it because I was following with my smartphone and needed to slide the command to see the last part). If correctly done, I apparently should have had this outcome:
Started unit mnt.mount for mount point: /mnt
However, I got this and didn’t realise it was wrong:
Started unit run-media-system-Tales.mount for mount point /run/media/system/Tales
I moved on with all commands of the tutorial, including mv /home. The result is that I lost contact to my /home folder, not even know where it is now, if somewhere…
You’re still good to go. But I’m thinking of a way to write out what you can do to proceed with minimal risk, since to be fair (and not trying to be mean), you might not have a full grasp on certain *nix concepts.
(Unless someone else wants to jump in.)
EDIT: I really, really mean that with sincerity. Everyone, including myself, started out not knowing even a sliver of anything related to Linux.