Tab Completion

The bash shell can guess what filename or command you are trying to type
and automatically finish typing it for you. Just type the beginning of a
command or filename and press Tab. If bash finds a single unique
completion, it will finish the word and put a space after it. If it finds
multiple possible completions, it will fill out the part all completions
have in common and beep. You can then enter enough of the word to make it
unique and press Tab again. If it finds no completions, it will simply
beep.

Managing Your Identity

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.