There are three types of users in Linux: 1. Super User: It is a type of user with the highest level of permissions in the system; also known as the "root user" 2. Normal User: These types of users have restricted access to the commands and files along with a shell and a home directory. 3. System User: Also known as the "Non-login" user; they neither have access to a shell nor to a home directory. All they have access to is some specific commands they are allowed to run.