1. Change Root User

sudo -i
## OR ##
su -
 

2. Install Adobe YUM Repository RPM package

## Adobe Repository 32-bit x86 ##
rpm -ivh http://linuxdownload.adobe.com/adobe-release/adobe-release-i386-1.0-1.noarch.rpm
rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-adobe-linux
 
## Adobe Repository 64-bit x86_64 ##
rpm -ivh http://linuxdownload.adobe.com/adobe-release/adobe-release-x86_64-1.0-1.noarch.rpm
rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-adobe-linux
 

3. Update Repositories

yum check-update
 

4a. Install Adobe Flash Player 11.1 on Fedora 16/15/14/13/12, CentOS 6.2/6.1/6/5.7 and Red Hat (RHEL) 6.2/6.1/6/5.7

Fedora 16/15/14/13/12, CentOS 6 and Red Hat (RHEL) 6 32-bit and 64-bit version

yum install flash-plugin nspluginwrapper alsa-plugins-pulseaudio libcurl
 

4b. Install Adobe Flash Player 11.1 on CentOS 5.7 and Red Hat (RHEL) 5.7

CentOS and Red Hat 32-bit and 64-bit version

yum groupinstall "Sound and Video"
 
yum install flash-plugin nspluginwrapper curl
 

5. Verify that the Flash Player Plugin is working

Open Mozilla Firefox and write about:plugins on address bar. Results should look like following:

Adobe Flash Player 64-bit installed on Fedora 16 64-bit (x86_64)