The chfn command in Linux allows you to change your username and other details easily. chfn stands for change finger. Basically, it is used to modify your finger information on Linux systems. This information is usually stored in the file /etc/passwd , which includes the user's original name, work phone number, etc.
syntax:
chfn [options] [login]
Example: In this example, we use the default "chfn" command without any options. In this system, users are required to change the values of some basic attributes themselves.