Thanks for the help so far. Now I believe I have successfully used
sudo in the terminal window and have installed RealPlayer 10.0.8.805
for Linux on my Ubuntu Breezy Badger machine. However, when I try to
play earlier versions of RA files, RA 3.0 files to be exact, this is
the error message I get: "The content you are trying to play uses an
audio codec that is obsolete and no longer supported. Please contact
the content provider about using a supported codec."

I can play the same RA 3.0 files in Windoze with the newer or older
RealPlayer so what do I have to do to play the older RA files with the
new RealPlayer in Ubuntu? I have converted some analog audio into the
Real 3.0 format so I need to have a player that I can listen to these
older formats in RealAudio.