In Linux, root privileges (or root access) refers to a user account that has full access to all files, applications, and system functions.
Most basic Linux user accounts run with limited privileges. This keeps users from making mistakes or accidentally exposing the system to vulnerabilities.

In this guide, we are going to learn how to Configure SSH to use a different Port on CentOS 7.
Even though configuring SSH Server to listen on a different port other than the default port, 22, may not gain you much from security point of view, there are still some advantages that goes with it;