Note that these instructions are for RPM-based systems only.

Real makes it very difficult to find the download page for the free Linux Real player. It's at http://scopes.real.com/real/player/unix/unix.html. Go there and download the player.

Rename the mis-named RPM:

mv rp8_linux20_libc6_i386_cs2_rpm rp8_linux20_libc6_i386_cs2.rpm

Install the rpm as normal:

rpm -Uhv rp8_linux20_libc6_i386_cs2_rpm

Now we need to configure MIME types for Mozilla. Open Mozilla. Choose Edit --> Preferences --> Navigator --> Helper Applications. Select New Type. Enter the following:

Description of type: RealMedia
File extension: ra, ram, rm
MIME type: audio/x-pn-realaudio
Application to use: /usr/X11R6/bin/realplay %s

Description of type: RealMedia
File extension: rm
MIME type: audio/vnd.pn-realmedia
Application to use: /usr/X11R6/bin/realplay %s

Description of type: SMIL
File extension: smi
MIME type: application/smil
Application to use: /usr/X11R6/bin/realplay %s

Description of type: RealAudio
File extension: ra, ram
MIME type: audio/vnd.rn-realaudio
Application to use: /usr/X11R6/bin/realplay %s

Description of type: RealVideo
File extension: rv
MIME type: audio/vnd.rn-realvideo
Application to use: /usr/X11R6/bin/realplay %s

You probably need to restart Mozilla. That's it - you're done! You can now play Real files directly, using just the player, and you can also play them from Web sites as well.