Did I include this program under fun because body parts are funny? Indeed. The finger program is used to find out information about a specific user given their username. The command syntax is finger username. I’m sure you can think of the word that Unix uses to describe this incredibly appropriate action.

[euid123@talon3 ~]$ finger euid123
Login: euid123        			Name: Scrappy Student
Directory: /home/euid123           	Shell: /bin/bash
On since Thu Mar 29 08:03 (CDT) on pts/1 from some-computer.unt.edu
   13 minutes 37 seconds idle
On since Thu Mar 29 08:28 (CDT) on pts/2 from some-computer.unt.edu
New mail received Tue Mar 27 15:07 2018 (CDT)
     Unread since Thu Mar 22 14:38 2018 (CDT)
No Plan.

As you can see, you can use finger on your own username as a way to check to see if you have mail.

Additionally, you can update your personal information that appears with finger using chfn. Some system administrators block you from changing this information, though, so knowing this probably isn’t very helpful.