问题
What is the difference between a superuser and a root user?
回答1:
sudo means superuserdo and gives you the chance to execute/do thing that only high privileged profiles can do, nowadays looks like another meaning is comming to that word, and many others refers to that als "substitute user do"
来源：https://stackoverflow.com/questions/43898333/doubts-on-the-meaning-of-superuser-in-ubuntu