* "gcc-6" should just be "gcc"
gcc-6 isn't a valid package name
* It was `adduser mastodon` for a reason
making it with `--system and --disabled-password` breaks the rest of the guide where `su - mastodon` is used.
I use this method as it makes maintaining the Mastodon instance easier.
* eval "$(rbenv init -)" should be in ~/.bashrc as well
otherwise the correct ruby version isn't used
* Use sudo su - instead
fcab2b3c97