I'm brand new to Linux (literally the only thing I know is basic UNIX commands for navigating directories/copying files) and I am trying to get Adobe Flash Player installed for FireFox on my CentOS 5.3/KDE desktop system I just set up.
After some googling, I typed the command "yum install firefox" and it magically downloaded and installed FireFox. I understand that YUM is the package manager but I don't really get the whole online repository thing. I guess my stock install of CentOS 5.3 has some default repository locations already configured and so it just knows which ones have FireFox? If someone could comment on this or point me towards an article/post that will explain it so I have a better understanding, I would appreciate it very much.
What I'm trying to do right now is get Flash installed so I can view flash websites. I went to NBA.com and clicked the embedded link that says Download Flash and it took me to an Adobe page where I eventually chose to download the version "YUM for Linux" which was a .RPM file (is this analogous to a .EXE file in Windows?). After downloading, a dialog box popped up and it started installing and afterwards it said it successfully installed - yet when I go to nba.com or other flash websites it still says I don't have flash. I have tried restarting my browser and rebooting the computer.
Any info/help on these questions would be greatly appreciated. Thanks so much.
EDIT: FYI, this is the file I downloaded/installed: