CGI Problem (Score -1, Offtopic)

Sorry, haven't been on \. for awhile and can't remember where to post qestions... Having a problem w/ CGI (sort of starting new w/ cgi's). At the top of each page you need to put in #!/usr/bin/perl now do you actually type that, or do you type the user name and cgi-bin... wtf do you really type basically? Thanks for n e help upfront.