Which file must I modified for my terminal services prompt

Question

When I Launch Terminal Bash the prompt I get is the following:
Firstname-Lastname-MacBook:~Username$
I just want to have $, which file must I change, and what changes must occur.
Thank you.

Answer 1

Just in case you are not familiar with shell scripting rules, you would use a utility such as
nano .bash_profile
and set PS1 to
PS1='$ '
It is important that you use single quotes to protect the $ from being seens as a bash substitution character.
It is also important that the PS1=' all be packed together. No spaces, tabs, or anything else between those characters.
If you actually know all of this, just consider it information for some future person asking this question.