How do you get past the login screen on the linux OS ?

CentOS release 5.7 (Final)

Kernel 2.6.18-274.el5PAE on an i686

test login:

"We must reject the idea that every time a law is broken, society is guilty rather than the law breaker.It is time to restore the American precept that each individual is accountable for his actions." ~ Ronald Regan