How to remotely copy files over SSH without entering a password

SSH (Secure Shell) is an encrypted protocol to connect with the remote device. By default, it works on TCP port 22. There are two methods to connect with the remote server using SSH, one is by using password authentication, and another way is to authenticate is by public key. In this tutorial, you will learn how to generate an SSH key and copy files over SSH (SCP) without entering a password in CentOS8.