chfn is used to change your finger information. This information is stored in the /etc/passwd file, and is displayed by the finger program. The Linux finger command will display four pieces of information that can be changed by chfn : your real name, your work room and phone, and your home phone.
In interactive mode, chfn will prompt for each field. At a prompt, you can enter the new information, or just press return to leave the field unchanged. Enter the keyword “none” to make the field blank.
Specify your real name.
Specify your office room number.
Specify your office phone number.
Specify your home phone number.
Print a usage message and exit.
Print version information and exit.