We have Oracle Apps Server (Fusion Middleware) 10.1.3.4 installed on Red Hat Enterprise Linux 5 and Oracle Unbreakable Linux (i've never found the difference between those two) and Windows Server 2003.... I think that's it. They all run well enough. Lyall -----Original Message----- From: Roger Xu <wellmetus@xxxxxxxxx> To: oracle-l@xxxxxxxxxxxxx Sent: Thu, Jan 14, 2010 11:56 am Subject: Red Hat Linux vs Oracle Enterprise Linux What is your opinion on running Oracle Application Server (10g) on top of OEL or RHL? We have the option of one of the following two: Oracle Enterprise Linux Release 5 Update 4 Red Hat Linux Version AS/ES Release 5 Update 4 Thanks, Roger Xu