So I downloaded a rpm file. The rpm was installed successfully. Once after installing a rpm file how do you run it? How do you run the program? Today is my first day using linux!! I was a window xp user

Generally the name of the program to run can be guessed from the filename of the rpm..
e.g : if the package is phex2.8.6.95.rpm the executable is phex

you can query the rpm package to find what are the files in installs to bin directories using

now you may try running these binary files..