Linux Hint published a tutorial about changing SSH port number in Linux.

How to Change SSH Port Number in Linux

SSH encrypts the connection between two computers. A port number is used to identify a process or an application that is communicating over a network. The default port can make the device vulnerable to brute force login attempts by bots. With a different port number, you can add an extra layer of security. The process of changing the SSH port is explained in this article.

How to Change SSH Port Number in Linux – Linux Hint