Another quick one:
This is really basic, and there is help out there, but it did take me a little while to get everything simplified and correct, so here’s the procedure:
$ sudo yum install http://linuxdownload.adobe.com/adobe-release/adobe-release-x86_64-1.0-1.noarch.rpm -y $ sudo rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-adobe-linux $ sudo yum install flash-plugin -y
After that, restart Firefox and you’re good to go. The advantage of installing by this method is that you’ve added Adobe’s official Linux repository to your list of repositories, meaning that henceforth, yum will check the repository for updated software and you’ll receive it directly from Adobe. The GPG-KEY import command simply ensures that your system recognizes the GNU Privacy Guard key being used by Adobe to sign the packages released through their repository as a means by which to confirm that it is genuinely from them and has not been modified from the form in which it was released in any way en route to your computer.