What is the benefits of using multi user?

Answer 1

Multi-user systems have two main benefits:

1. The information of different users is kept separate: each can have their own credentials, settings, personal files etc. On Unix-like sytems (Linux, BSD, OS X etc.), each user has their own home directory, generally found at /home/username and referred to as ~/ . This folder contains all data pertaining to that user so that user accounts can, in theory, be moved from one system to another more easily.
2. It is normally more secure; varying privileges can be assigned to different users. This means that users can be prevented from writing to any system files as well as being unable to read or write data belonging to other users on the same system.