>First you will need to make the file executable:

>Open a terminal and change to Desktop directory:

cd Desktop

>Then you will need to make the file executable:

chmod +x RealPlayer10GOLD.bin

>then if you want to install as the root user, use sudo:

sudo ./RealPlayer10GOLD.bin

>However, I would recommend you not install as root, just install as a
user in your user directory.

./RealPlayerGOLD.bin