Sólo debes tener el repositorio de Adobe configurado, habilitado, y ejecutar:
]# yum --enablerepo=adobe-linux install flash-plugin adobe-linux 100% |=========================| 951 B 00:00 primary.xml.gz 100% |=========================| 10 kB 00:01 adobe-linu: ################################################## 17/17 Setting up Install Process Parsing package install arguments Resolving Dependencies --> Running transaction check ---> Package flash-plugin.i386 0:9.0.115.0-release set to be updated --> Finished Dependency Resolution Dependencies Resolved ============================================================================= Package Arch Version Repository Size ============================================================================= Installing: flash-plugin i386 9.0.115.0-release adobe-linux 2.9 M Transaction Summary ============================================================================= Install 1 Package(s) Update 0 Package(s) Remove 0 Package(s) Total download size: 2.9 M Is this ok [y/N]: y Downloading Packages: (1/1): flash-plugin-9.0.1 100% |=========================| 2.9 MB 04:08 warning: rpmts_HdrFromFdno: Header V3 DSA signature: NOKEY, key ID f6777c67 Importing GPG key 0xF6777C67 "Adobe Systems Incorporated (Linux RPM Signing Key) <secure@adobe.com>" from /etc/pki/rpm-gpg/RPM-GPG-KEY-adobe-linux Is this ok [y/N]: y Running rpm_check_debug Running Transaction Test Finished Transaction Test Transaction Test Succeeded Running Transaction Installing: flash-plugin ######################### [1/1] Installed: flash-plugin.i386 0:9.0.115.0-release Complete!