Well, copy pasting is just that: copy, paste.
But typing them in manually is–in a terminal session–typing in each individual command, letter-by-letter. I’m writing these original sentences letter-by-letter, for example.
All that aside, I hope we can at least all agree that the steps for installation are all present–and have been–since your first attempt.
It’s no biggie–it really isn’t, but it seems more likely that just as you forgot Java, you potentially forgot other lines as well.
apt-get install -y git supervisor rdiff-backup screen build-essential
It’s possible that numerous packages in this line are already installed by default, e.g., git. Your initial post showed that Java and screen were missing, and it’s possible that the other dependencies are missing as well (explanation: it was just simply missed).
So the fact that you haven’t received any
supervisor errors isn’t indicative that “all is well”. It just means you haven’t used the functionality that requires it, and therefore haven’t seen the error.
I really recommend you go over the installation process again. There is no danger to repeatedly executing the installation steps because you’re at the point where all the configuration is default, anyway.