Unix-like systems are multiuser, and so you have your own electronic
identity as a user on the system. Type finger _yourusername_ to look
at some of the information about you that’s publically available. To
change the name and shell listed there, you can use the commands
chfn and chsh. Only the superuser can change your login (username)
and directory. You’ll notice that it says “No plan.” A “plan” is
just some information you can make available to others. To create a
plan, you put whatever information you want people to see in a file
called .plan. To do this you’ll use a text editor; see section 8.2
on page [*]. Then finger yourself to see your plan. Others can
finger you to see your plan and to check whether you’ve received new
mail or read your mail.
Note that this finger information is available to the entire
Internet by default. If you don’t want this, read about configuring
inetd and the file
/etc/services. Eventually the installation manual will describe this
configuration, but for now you might try the man pages or just put
nonsense in for your finger information.